AnyBot/src/app.rs

// The window: bot list on the left, the chosen bot's chat on the right,
// plus the bot editor and the settings (look and AI providers).

use chrono::Datelike;
use eframe::egui::{self, vec2, Align, Color32, CornerRadius, Frame, Key, Layout, Margin, RichText, Stroke};
use std::collections::HashMap;
use std::path::PathBuf;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::mpsc::{channel, Receiver, Sender};
use std::sync::{Arc, Mutex};
use std::time::Instant;

use crate::agent;
use crate::appctl;
use crate::avatar;
use crate::notify;
use crate::policy;
use crate::web;
use crate::model::{Accent, Bot, Message, Role, State, Theme, ToolStatus, TurnOutcome, TurnSettlement};
use crate::providers::{self, AppCall, Approval, ApprovalAnswer, ApprovalKind, ChatRequest, ProviderKind, StreamEvent, ALL_PROVIDERS};
use crate::tools;
use crate::i18n::t;
use crate::theme::{Palette, DARK, LIGHT};

mod attach_ui;
mod channels_ui;
mod computers_ui;
mod chat_ui;
mod files_ui;
mod panel_ui;
mod remote_ui;
mod sidebar_ui;
mod menu_ui;
mod vault_ui;
mod markdown_ui;
mod welcome_ui;
mod mirror_ui;
mod pages_ui;

// Sidebar rules from index.eager-app: defaults `FT={expandedWidth:280}` (@912025),
// clamp `jT(..,240,400)` (@914394), and the drag rule in `QJe` (@969523):
// folds to an 88 px rail below 210 px, unfolds from the rail only past 220 px.
pub const SIDEBAR_DEFAULT_WIDTH: f32 = 280.0;
pub const SIDEBAR_MIN_WIDTH: f32 = 240.0;
pub const SIDEBAR_MAX_WIDTH: f32 = 400.0;
pub const SIDEBAR_RAIL_WIDTH: f32 = 88.0;
pub const SIDEBAR_COLLAPSE_BELOW: f32 = 210.0;
pub const SIDEBAR_EXPAND_FROM: f32 = 220.0;
/// `--sand-chat-min-width:424px` (index CSS, class sand-1fiktjy).
pub const CHAT_MIN_WIDTH: f32 = 424.0;
/// Transcript text: `--sand-transcript-prose-line-height:22px` pairs with `--sand-font-size-lg:15px`.
/// The original's type scale (renderer index.css `--sand-font-size-*`): xxs 11, xs 12, sm 13,
/// base 14, lg 15, xl 17, xxl 22, xxxl 26 px, with `--sand-line-height-*` 16/16/18/20/22/24/28/32.
pub const FONT_XS: f32 = 12.0;
pub const FONT_SM: f32 = 13.0;
pub const FONT_BASE: f32 = 14.0;
pub const FONT_LG: f32 = 15.0;
pub const FONT_XL: f32 = 17.0;
pub const LINE_HEIGHT_SM: f32 = 18.0;
pub const LINE_HEIGHT_LG: f32 = 22.0;
pub const LINE_HEIGHT_XL: f32 = 24.0;
/// Chat text uses the lg step (15 px on 22 px lines).
pub const TRANSCRIPT_FONT: f32 = FONT_LG;
pub const TRANSCRIPT_LINE_HEIGHT: f32 = LINE_HEIGHT_LG;
/// `--sand-transcript-prose-bubble-radius:18px`, one-line bubble `--sand-transcript-prose-one-line-height:36px`.
pub const BUBBLE_RADIUS: u8 = 18;
pub const BUBBLE_ONE_LINE_HEIGHT: f32 = 36.0;
pub const TRANSCRIPT_MAX_WIDTH: f32 = 720.0;
/// Space kept above and below Settings / Bot 設定 so they never run off the window (estimated).
const WINDOW_SCREEN_MARGIN: f32 = 80.0;
/// Provider names in Settings fit on one line (「自訂（OpenAI 相容）」) (estimated).
const PROVIDER_LIST_WIDTH: f32 = 180.0;
/// Settings: dialog width, its left-hand page list, and a steady height so tabs don't jump.
const SETTINGS_WIDTH: f32 = 760.0;
const SETTINGS_NAV_WIDTH: f32 = 150.0;
const SETTINGS_HEIGHT: f32 = 600.0;
/// Bot 設定 dialog width.
const EDITOR_WIDTH: f32 = 540.0;
/// The label column in form rows ("預設電腦", "模型可讀長度"…).
const FORM_LABEL_WIDTH: f32 = 96.0;
/// Tool steps under a reply start a little in from the bubble's edge.
pub const SCREENSHOT_FRAMES: u32 = 120;

#[derive(PartialEq, Clone, Copy)]
/// Like the original's seven panes (一般、整合、電腦、權限、保險庫、用量與帳單、更新); AnyBot has
/// 模型 (its own AI keys) where the original has 用量與帳單, and 帳戶 opens from 一般.
enum SettingsTab {
    General,
    Providers,
    Channels,
    Computers,
    Review,
    Vault,
    Updates,
    Remote,
}

pub struct App {
    state: State,
    pal: Palette,
    demo: bool,
    screenshot: Option<PathBuf>,
    frames: u32,
    shot_requested: bool,
    shot: Arc<Mutex<Option<Arc<egui::ColorImage>>>>,
    drafts: HashMap<u64, String>,
    search: String,
    streams: HashMap<u64, Live>,
    /// A tool waiting for the person's yes/no, per bot.
    approvals: HashMap<u64, Approval>,
    /// App actions (e.g. deleting a routine) waiting for that yes/no.
    app_pending: HashMap<u64, AppCall>,
    /// Messages that arrived as a turn ended: they start the next turn.
    pending_turns: Vec<(u64, Vec<String>)>,
    last_tick: Instant,
    /// The routines list for this bot is open.
    show_routines: Option<u64>,
    new_remote: (String, String),
    new_browser_profile: String,
    browser_note: std::sync::Arc<std::sync::Mutex<String>>,
    confirm_remove_profile: Option<String>,
    confirm_delete_routine: Option<(u64, u64)>,
    /// A short message shown above the message box (e.g. after a restart).
    notice: Option<String>,
    /// Requests whose pop-up the person put off ("稍後再決定"); the chat card stays.
    popup_hidden: std::collections::HashSet<u64>,
    /// "全部允許，之後直接操作" was clicked in a request.
    want_direct: std::cell::Cell<bool>,
    /// Admin locks (policy.rs), read at start and when Settings opens.
    managed: policy::Managed,
    settings_was_open: bool,
    /// When the program file this copy started from was built (its version).
    exe_built: Option<std::time::SystemTime>,
    /// A newer build has replaced the program file since this copy started.
    newer_build: Option<std::time::SystemTime>,
    last_build_check: Instant,
    /// Next time to consider switching to a newer build by itself (30 s after start, then hourly).
    next_update_apply: Instant,
    window_focused: bool,
    idle_secs: Option<f64>,
    last_presence: Instant,
    relaunching: bool,
    /// The sidebar's "new version" banner was clicked.
    relaunch_requested: bool,
    new_allow_rule: String,
    new_ask_rule: String,
    side_drag: Option<f32>,
    tx: Sender<(u64, StreamEvent)>,
    rx: Receiver<(u64, StreamEvent)>,
    show_settings: bool,
    settings_tab: SettingsTab,
    settings_provider: ProviderKind,
    edit_bot: Option<(Bot, bool)>,
    confirm_delete: Option<u64>,
    model_fetch: HashMap<ProviderKind, Receiver<Result<Vec<String>, String>>>,
    fetch_status: HashMap<ProviderKind, String>,
    dirty: bool,
    last_save: Instant,
    stick_bottom: bool,
    /// Bot 的電腦 viewer, rebuild dialog and the computers page.
    cu: computers_ui::ComputerUi,
    vault: vault_ui::VaultUi,
    md: markdown_ui::MdState,
    /// The page open large (頁面): its id, and an older revision when looking at one.
    page_view: Option<(u64, Option<u32>)>,
    /// Files and pictures waiting to go with the next message.
    att: attach_ui::AttachUi,
    /// 訊息管道 (Slack / Discord / Telegram).
    ch: channels_ui::ChannelUi,
    /// A shared bot file being picked.
    share_rx: Option<Receiver<Result<String, String>>>,
    /// 群組聊天: members still to answer in this round, and groups whose next member should start.
    group_queue: HashMap<u64, std::collections::VecDeque<u64>>,
    group_next: Vec<u64>,
    /// 引用: the message being quoted in the next message, per bot.
    quoting: HashMap<u64, String>,
    /// Index of the message being drawn (for reactions).
    msg_index: usize,
    /// 手機與帳號.
    rm: remote_ui::RemoteUi,
    /// Running as `anybot --serve` (no window; the phone is the screen).
    headless: bool,
    /// 右側面板 and its tab (None = closed).
    panel: Option<panel_ui::PanelTab>,
    /// When each emoji reaction appeared (for its pop) and when each message first showed (fade-in).
    popped: HashMap<(u64, usize, String), Instant>,
    appeared: HashMap<(u64, usize), Instant>,
    /// Messages whose steps / thinking are unfolded (⋯ › 顯示步驟).
    steps_open: std::collections::HashSet<(u64, usize)>,
    /// The file being previewed.
    file_view: Option<files_ui::FileView>,
    started_ms: i64,
    /// The message whose hover menu (表情 / ⋯) is open: its buttons stay while it is.
    menu_for: Option<(u64, usize)>,
    /// Each face's motion (gaze, blink, pokes).
    faces: HashMap<u64, sidebar_ui::Face>,
    search_open: bool,
    confirm_section_delete: Option<String>,
    /// A group being renamed: (old name, what is typed).
    renaming: Option<(String, String)>,
    /// The group whose ⋯ menu is open (its button stays while it is).
    group_menu_for: Option<String>,
    /// When the launch greeting started.
    splash_at: Option<f64>,
    /// 大腦: this window shows another AnyBot's bots (a screen), or answers screens (the brain).
    mir: mirror_ui::Mirror,
    scr: mirror_ui::Screens,
    ctx_handle: Option<egui::Context>,
}

impl App {
    pub fn new(ctx: &egui::Context, screenshot: Option<PathBuf>) -> Self {
        // ANYBOT_SHOT_REAL=1: a screenshot of the real data (and connections), not the demo.
        let demo = screenshot.is_some() && std::env::var("ANYBOT_SHOT_REAL").is_err();
        let state = if demo { State::demo() } else { State::load() };
        let (tx, rx) = channel();
        let mut app = App {
            state,
            pal: LIGHT,
            demo,
            screenshot,
            frames: 0,
            shot_requested: false,
            shot: Arc::new(Mutex::new(None)),
            drafts: HashMap::new(),
            search: String::new(),
            streams: HashMap::new(),
            approvals: HashMap::new(),
            app_pending: HashMap::new(),
            pending_turns: vec![],
            last_tick: Instant::now(),
            show_routines: None,
            new_remote: Default::default(),
            new_browser_profile: String::new(),
            browser_note: Default::default(),
            confirm_remove_profile: None,
            confirm_delete_routine: None,
            notice: None,
            popup_hidden: Default::default(),
            want_direct: Default::default(),
            managed: if demo { policy::Managed::default() } else { policy::read() },
            settings_was_open: false,
            exe_built: exe_modified(),
            newer_build: None,
            last_build_check: Instant::now(),
            next_update_apply: Instant::now() + std::time::Duration::from_secs(notify::UPDATE_FIRST_CHECK_SECS),
            window_focused: true,
            idle_secs: None,
            last_presence: Instant::now(),
            relaunching: false,
            relaunch_requested: false,
            new_allow_rule: String::new(),
            new_ask_rule: String::new(),
            side_drag: None,
            tx,
            rx,
            show_settings: false,
            settings_tab: SettingsTab::General,
            settings_provider: ProviderKind::Xai,
            edit_bot: None,
            confirm_delete: None,
            model_fetch: HashMap::new(),
            fetch_status: HashMap::new(),
            dirty: false,
            last_save: Instant::now(),
            stick_bottom: true,
            cu: Default::default(),
            vault: Default::default(),
            md: Default::default(),
            page_view: None,
            att: Default::default(),
            ch: Default::default(),
            share_rx: None,
            group_queue: HashMap::new(),
            group_next: vec![],
            quoting: HashMap::new(),
            msg_index: 0,
            rm: Default::default(),
            headless: false,
            panel: None,
            popped: HashMap::new(),
            appeared: HashMap::new(),
            steps_open: Default::default(),
            file_view: None,
            started_ms: crate::model::now_ms(),
            menu_for: None,
            faces: HashMap::new(),
            search_open: false,
            confirm_section_delete: None,
            renaming: None,
            group_menu_for: None,
            splash_at: None,
            mir: Default::default(),
            scr: Default::default(),
            ctx_handle: None,
        };
        crate::i18n::set(&app.state.language);
        app.computers_start();
        if demo {
            // The computer helper's pending step, so the picture shows the approval card.
            let (reply, _) = channel();
            // This Mac isn't allowed yet, so the bot's step pops up a request.
            app.state.local_execution = false;
            app.approvals.insert(5, Approval {
                call_id: "c2".into(),
                tool: "shell".into(),
                reason: "在你的電腦上執行任務，而不只是在它自己的電腦上：mkdir -p 2026-04 2026-05 2026-06 && mv IMG_04*.jpg 2026-04/\n（在 你的電腦 上）".into(),
                grant: "local:on".into(),
                reply,
                kind: ApprovalKind::EnableThisComputer,
            });
            app.streams.insert(5, Live {
                cancel: Arc::new(AtomicBool::new(false)),
                started: Instant::now(),
                last: Instant::now(),
                produced: true,
                status: None,
                paused: true,
                steer: Arc::new(Mutex::new(vec!["2026-06 的照片先不要動".into()])),
                direct: Arc::new(AtomicBool::new(false)),
                turn_id: "demo".into(),
            });
            // Optional view for checking the dialogs in a picture.
            match std::env::var("ANYBOT_SHOT_VIEW").as_deref() {
                Ok("chat") => app.state.selected = 1,
                // 頁面: a tracking page in the chat (pagecard), and opened (page).
                Ok(v @ ("pagecard" | "page")) => {
                    app.state.selected = 1;
                    app.approvals.clear();
                    app.streams.remove(&5);
                    let (pages, next, id) = crate::pages::demo(crate::model::now_ms());
                    app.state.pages = pages;
                    app.state.next_page_id = next;
                    if let Some(b) = app.state.bot_mut(1) {
                        b.messages.push(Message::user("幫我追蹤一下台灣 FSD 狀況"));
                        let mut m = Message::assistant("交通部今天對台灣 FSD 有新的官方說法，但你 12 月交車時多半還是不能用，現在先別花錢。\n\nNOWnews 今天專訪交通部監理司專門委員。他說 7 月和 9 月已經開過兩次專家審查會議，交通部希望年底前完成相關審查，但不保證年底開放，而且路測計畫還沒核定。來源和細節都更新在[台灣 Tesla FSD 追蹤](page:1)。", "Master · Custom · qwen3.8-flash-next");
                        m.tool_calls.push(crate::model::ToolCall { id: "pg1".into(), name: "write_page".into(), args: serde_json::json!({"id": id, "title": "台灣 Tesla FSD 追蹤"}).to_string(), status: crate::model::ToolStatus::Done });
                        b.messages.push(m);
                    }
                    if v == "page" {
                        app.page_view = Some((id, None));
                    }
                }
                Ok("settings") => {
                    app.show_settings = true;
                    app.settings_tab = SettingsTab::Providers;
                    app.settings_provider = ProviderKind::Anthropic;
                }
                Ok("editor") => {
                    app.edit_bot = app.state.bot(5).cloned().map(|mut b| {
                        b.allow_rules = vec!["edit_file".into(), "shell:npm install".into()];
                        (b, false)
                    })
                }
                Ok("menu") => app.state.selected = 4,
                Ok("rail") => app.state.sidebar_collapsed = true,
                Ok("routines") => {
                    app.state.selected = 2;
                    app.show_routines = Some(2);
                }
                Ok("viewer") => {
                    crate::cloudbox::start_background();
                    let _ = crate::cloudbox::ensure_running();
                    app.cu.demo_live = true;
                    app.cu.viewer_open = true;
                    app.cu.fit = true;
                }
                Ok("attach") => {
                    app.state.selected = 1;
                    let dir = std::env::temp_dir().join("anybot-shot-attach");
                    let _ = std::fs::create_dir_all(&dir);
                    let img = dir.join("行程截圖.png");
                    let mut pic = image::RgbImage::from_pixel(640, 400, image::Rgb([0xe8, 0xf0, 0xfb]));
                    for x in 40..600 { for y in 60..90 { pic.put_pixel(x, y, image::Rgb([0x16, 0x80, 0xf3])); } }
                    let _ = pic.save(&img);
                    let doc = dir.join("台南景點清單.md");
                    let _ = std::fs::write(&doc, "# 台南\n- 赤崁樓\n- 安平古堡\n");
                    for f in [&img, &doc] {
                        if let Ok(a) = crate::attach::store(1, f) {
                            app.att.pending.entry(1).or_default().push(a);
                        }
                    }
                }
                Ok("channels") => {
                    app.show_settings = true;
                    app.settings_tab = SettingsTab::Channels;
                    app.state.channels.push(crate::channels::Channel { id: 1, kind: crate::channels::Kind::Slack, name: "客服群".into(), bot_id: 2, token: "xoxb-demo".into(), target: "C0123ABCD".into(), enabled: true, client_id: String::new(), tenant: String::new() });
                }
                Ok("group") => {
                    let id = app.state.next_id;
                    app.state.next_id += 1;
                    let mut g = app.state.bots[0].clone();
                    g.id = id;
                    g.name = "旅遊小組".into();
                    g.description = "研究助理、寫作夥伴一起回答".into();
                    g.shape = "cloud".into();
                    g.members = vec![2, 3];
                    let mut m1 = Message::assistant("台南兩天：第一天安平、第二天府城老街。", "研究助理 · Claude · claude-opus-5-5");
                    m1.author = 2;
                    m1.reactions = vec!["👍".into()];
                    m1.tool_calls.push(crate::model::ToolCall { id: "card1".into(), name: "show_card".into(), args: serde_json::json!({"kind": "weather", "title": "台南 · 下週六", "subtitle": "中央氣象署預報", "rows": [{"label": "天氣", "value": "晴時多雲"}, {"label": "溫度", "value": "22–29°C"}, {"label": "降雨機率", "value": "10%"}], "link": "https://www.cwa.gov.tw"}).to_string(), status: crate::model::ToolStatus::Done });
                    let mut m2 = Message::assistant("補充一個寫遊記的角度：用「老屋裡的光」當主題，照片挑早上拍的。", "寫作夥伴 · OpenAI · gpt-5");
                    m2.author = 3;
                    g.messages = vec![Message::user("下個月去台南，大家給點建議"), m1, m2];
                    app.quoting.insert(id, "台南兩天：第一天安平、第二天府城老街。".into());
                    app.state.bots.push(g);
                    app.state.selected = id;
                }
                Ok("remote") => {
                    app.show_settings = true;
                    app.settings_tab = SettingsTab::Remote;
                    app.state.remote.password = "x$y".into();
                    app.state.remote.lan = true;
                    app.state.remote.relay_url = "https://anybot.example.com".into();
                    app.state.remote.relay_user = "daniel".into();
                    app.state.remote.host_token = "demo".into();
                    app.state.remote.host_name = "工作室 Mac".into();
                    app.state.remote.last_backup = chrono::Utc::now().timestamp() - 3_600;
                    app.state.remote.device_link = true;
                    app.state.remote.devices = vec![crate::remote::Device { name: "iPhone".into(), token_hash: String::new(), created: chrono::Utc::now().timestamp() - 86_400, last_seen: chrono::Utc::now().timestamp() - 600 }];
                }
                Ok("working") => {
                    // The computer helper mid-task with no pending request: the ring and phrase.
                    app.state.selected = 5;
                    app.approvals.remove(&5);
                    if let Some(b) = app.state.bot_mut(5) {
                        if let Some(m) = b.messages.iter_mut().rev().find(|m| m.role == Role::Assistant) {
                            for c in m.tool_calls.iter_mut() {
                                c.name = "read_file".into();
                                c.status = ToolStatus::Running;
                            }
                        }
                    }
                }
                Ok("files") | Ok("fileview") => {
                    for b in app.state.bots.iter_mut() {
                        if b.id == 2 || b.id == 3 {
                            b.folder = "工作".into();
                        }
                    }
                    let dir = std::env::temp_dir().join("anybot-shot-files");
                    let _ = std::fs::create_dir_all(&dir);
                    let csv = dir.join("orders_20261102_packages.csv");
                    let mut rows = String::from("訂單號,訂單時間,店鋪,商品名稱,數量\n");
                    for i in 0..22 {
                        rows.push_str(&format!("33165343590{:04},2026-10-29 20:13,{},特斯拉 Model Y 配件 {},{}\n", 5101 + i, ["3w旗艦店", "Tesla特斯拉官方", "特友之家旗艦店"][i % 3], i + 1, 1 + i % 3));
                    }
                    let _ = std::fs::write(&csv, rows);
                    let md = dir.join("台南兩天一夜.md");
                    let _ = std::fs::write(&md, "# 台南兩天一夜\n\n## 第一天\n- 赤崁樓\n- 國華街小吃\n\n## 第二天\n- 安平古堡\n- **四草綠色隧道**\n");
                    let html = dir.join("報價頁.html");
                    let _ = std::fs::write(&html, "<html><body><h1>報價</h1><p>總計 NT$ 12,800</p></body></html>");
                    let png = dir.join("行程地圖.png");
                    let mut pic = image::RgbImage::from_pixel(800, 500, image::Rgb([0xe8, 0xf0, 0xfb]));
                    for x in 100..700 { for y in 230..270 { pic.put_pixel(x, y, image::Rgb([0x16, 0x80, 0xf3])); } }
                    let _ = pic.save(&png);
                    let now = crate::model::now_ms();
                    let mut atts = vec![];
                    for f in [&csv, &md, &html, &png] {
                        if let Ok(a) = crate::attach::store(1, f) {
                            atts.push(a);
                        }
                    }
                    let mut u = Message::user("我有多了兩項訂單，請幫我更新，順便把行程整理成文件給我");
                    u.at = now - 26 * 3_600_000;
                    u.reactions = vec!["❤️".into()];
                    let mut a1 = Message::assistant("好，我去把新的兩張訂單抓下來，補進表格。", "");
                    a1.at = u.at + 4_000;
                    let mut a2 = Message::assistant("更新好了，兩張 10/31 的新訂單已經補在最上面。\n\n- 特友之家的車門垃圾桶（2 個裝）買 1 組\n- 特友黑洛第二代油門剎車踏板買 2 個\n\n行程和報價也整理好了：", "");
                    a2.at = u.at + 60_000;
                    a2.attachments = atts;
                    a2.reactions = vec!["👍".into()];
                    let mut u2 = Message::user("太好了，謝謝！");
                    u2.at = now - 60_000;
                    let mut b = app.state.bots[0].clone();
                    b.messages = vec![u, a1, a2, u2];
                    app.state.bots[0] = b;
                    app.state.selected = app.state.bots[0].id;
                    if std::env::var("ANYBOT_SHOT_VIEW").as_deref() == Ok("fileview") {
                        // ANYBOT_SHOT_FILE: preview that file instead of the sample spreadsheet.
                        match std::env::var("ANYBOT_SHOT_FILE") {
                            Ok(f) => {
                                let name = std::path::Path::new(&f).file_name().map(|n| n.to_string_lossy().to_string()).unwrap_or_default();
                                app.open_file(&name, &f);
                            }
                            Err(_) => app.open_file("orders_20261102_packages.csv", &csv.display().to_string()),
                        }
                    }
                }
                Ok("panel") => {
                    // The real box, so the 電腦 card shows its screen.
                    crate::cloudbox::start_background();
                    let _ = crate::cloudbox::ensure_running();
                    app.cu.demo_live = true;
                    app.state.selected = 1;
                    app.panel = Some(panel_ui::PanelTab::Activity);
                }
                Ok("general") => {
                    app.show_settings = true;
                    app.settings_tab = SettingsTab::General;
                }
                Ok("computers") => {
                    app.show_settings = true;
                    app.settings_tab = SettingsTab::Computers;
                }
                Ok("markdown") => {
                    // Every Markdown element the chat draws, in one reply.
                    let text = "## 出差流程整理\n先看重點，**下週三前**要送出申請；細節在 [公司內網](https://example.com/travel)。\n第二行直接換行，不用空一行。\n\n### 步驟\n1. 填出差單\n2. 主管核准\n   - 金額超過 3 萬要*總經理*簽\n   - ~~紙本~~ 改用線上表單\n3. 訂機票和住宿\n\n- [x] 護照效期確認\n- [ ] 換外幣\n\n> 提醒：發票抬頭要寫公司全名。\n\n| 項目 | 上限 | 備註 |\n|---|--:|---|\n| 住宿 | 3,500 | 每晚 |\n| 交通 | 實報實銷 | 留收據 |\n| 餐費 | 800 | `每日` |\n\n```python\n# 算總額\ndef total(days, rate=3500):\n    return days * rate + 800 * days\n```\n\n```mermaid\nflowchart LR\n  A[填出差單] --> B{超過 3 萬？}\n  B -->|是| C[總經理簽核]\n  B -->|否| D[主管簽核]\n  C --> E[訂機票住宿]\n  D --> E\n```\n\n---\n有問題再問我！";
                    let mut u = Message::user("幫我整理出差流程");
                    u.at = crate::model::now_ms() - 120_000;
                    let mut a = Message::assistant(text, "");
                    a.at = u.at + 5_000;
                    let mut b = app.state.bots[0].clone();
                    b.messages = vec![u, a];
                    app.state.bots[0] = b;
                    app.state.selected = app.state.bots[0].id;
                }
                Ok("vault") => {
                    app.show_settings = true;
                    app.settings_tab = SettingsTab::Vault;
                }
                Ok("review") => {
                    app.show_settings = true;
                    app.settings_tab = SettingsTab::Review;
                    app.state.auto_review = true;
                    app.state.review_allow_rules = vec!["在工作資料夾裡建立或修改文字檔".into()];
                    app.state.review_ask_rules = vec!["刪除任何檔案".into(), "花錢或付款".into()];
                }
                _ => {}
            }
            if let Ok(l) = std::env::var("ANYBOT_SHOT_LANG") {
                app.state.language = l.clone();
                crate::i18n::set(&l);
            }
            if std::env::var("ANYBOT_SHOT_DARK").is_ok() {
                app.state.theme = Theme::Dark;
            }
            // For checking each screen without the demo's waiting pop-up on top.
            if std::env::var("ANYBOT_SHOT_NOPOPUP").is_ok() {
                app.popup_hidden.extend(app.state.bots.iter().map(|b| b.id));
            }
        }
        app.apply_theme(ctx);
        // Real-data screenshots can open 設定 › 手機與帳號 (to press its buttons with ANYBOT_SHOT_CLICK).
        if app.screenshot.is_some() && !app.demo && std::env::var("ANYBOT_SHOT_VIEW").as_deref() == Ok("remote") {
            app.show_settings = true;
            app.settings_tab = SettingsTab::Remote;
        }
        app
    }

    fn apply_theme(&mut self, ctx: &egui::Context) {
        let dark = match self.state.theme {
            Theme::Light => false,
            Theme::Dark => true,
            Theme::System => ctx.input(|i| i.raw.system_theme) == Some(egui::Theme::Dark),
        };
        self.pal = if dark { DARK } else { LIGHT };
        let p = self.pal;
        let mut v = if dark { egui::Visuals::dark() } else { egui::Visuals::light() };
        v.panel_fill = p.pane;
        v.window_fill = p.elevated;
        v.extreme_bg_color = p.sidebar;
        v.text_edit_bg_color = Some(p.sidebar);
        v.faint_bg_color = p.hover;
        v.override_text_color = Some(p.text);
        v.window_stroke = Stroke::new(1.0, p.border);
        v.window_corner_radius = CornerRadius::same(14);
        v.menu_corner_radius = CornerRadius::same(10);
        v.selection.bg_fill = p.focus.gamma_multiply(0.35);
        v.selection.stroke = Stroke::new(1.0, p.focus);
        v.hyperlink_color = p.accent;
        for w in [&mut v.widgets.inactive, &mut v.widgets.hovered, &mut v.widgets.active, &mut v.widgets.open] {
            w.corner_radius = CornerRadius::same(8);
        }
        v.widgets.inactive.weak_bg_fill = p.hover;
        v.widgets.inactive.bg_fill = p.hover;
        v.widgets.hovered.weak_bg_fill = p.active;
        v.widgets.hovered.bg_fill = p.active;
        v.widgets.active.weak_bg_fill = p.active;
        v.widgets.inactive.bg_stroke = Stroke::NONE;
        v.widgets.hovered.bg_stroke = Stroke::NONE;
        v.widgets.noninteractive.bg_stroke = Stroke::new(1.0, p.border);
        ctx.set_visuals(v);
        ctx.all_styles_mut(|s| {
            // Menus like the original's: 16 px corners, 6 px inside, rows touching.
            s.visuals.menu_corner_radius = CornerRadius::same(16);
            s.spacing.menu_margin = Margin::same(6);
            s.spacing.menu_spacing = 0.0;
            s.visuals.popup_shadow = egui::epaint::Shadow { offset: [0, 10], blur: 30, spread: 0, color: Color32::from_black_alpha(70) };
            s.spacing.item_spacing = vec2(8.0, 6.0);
            s.spacing.button_padding = vec2(10.0, 5.0);
            s.text_styles.insert(egui::TextStyle::Body, egui::FontId::proportional(FONT_BASE));
            s.text_styles.insert(egui::TextStyle::Button, egui::FontId::proportional(FONT_BASE));
            s.text_styles.insert(egui::TextStyle::Small, egui::FontId::proportional(FONT_XS));
            s.text_styles.insert(egui::TextStyle::Heading, egui::FontId::proportional(FONT_XL));
            s.text_styles.insert(egui::TextStyle::Monospace, egui::FontId::monospace(FONT_SM));
        });
    }

    fn mark(&mut self) {
        self.dirty = true;
    }

    fn bot_color(&self, b: &Bot) -> Color32 {
        let c = avatar::color(&b.color);
        // A black avatar would vanish on the dark page: lift it to a dark grey there.
        if self.pal.pane != LIGHT.pane && (c.r() as u32 + c.g() as u32 + c.b() as u32) < 120 {
            return Color32::from_gray(0x4a);
        }
        c
    }

    fn user_bubble(&self, b: &Bot) -> Color32 {
        match self.state.accent {
            Accent::BotColor if b.color != "black" => self.bot_color(b),
            _ => self.pal.bubble_user,
        }
    }

    // ---------- chat ----------

    fn send(&mut self, ctx: &egui::Context, bot_id: u64) {
        let mut text = self.drafts.get(&bot_id).cloned().unwrap_or_default();
        if text.trim().is_empty() && !self.has_pending_attachments(bot_id) {
            return;
        }
        // 引用: the quoted words go first, as a Markdown quote.
        if let Some(q) = self.quoting.remove(&bot_id) {
            let quoted: String = q.lines().take(8).map(|l| format!("> {l}\n")).collect();
            text = format!("{quoted}\n{}", text.trim());
        }
        let attachments = self.take_attachments(bot_id);
        if self.mir.on {
            if self.mirror_send(bot_id, text.trim().to_string(), attachments) {
                self.drafts.insert(bot_id, String::new());
            }
            return;
        }
        self.drafts.insert(bot_id, String::new());
        // While it works, a new message steers the running turn (the original's `turnSteer`:
        // it doesn't count as a new turn) and reaches the model at its next step.
        if let Some(l) = self.streams.get(&bot_id) {
            let (extra, _) = crate::attach::for_model(&attachments);
            l.steer.lock().unwrap().push(format!("{}{extra}", text.trim()));
            return;
        }
        if let Some(b) = self.state.bot_mut(bot_id) {
            b.messages.push(Message { attachments, ..Message::user(text.trim()) });
        }
        self.start_reply(ctx, bot_id);
    }

    fn start_reply(&mut self, ctx: &egui::Context, bot_id: u64) {
        if self.mir.on {
            self.mirror_act(serde_json::json!({"bot": bot_id, "action": "reply"}));
            return;
        }
        let Some(conv) = self.state.bot(bot_id).cloned() else { return };
        // 群組聊天: the next member answers, with its own model, instructions and computers.
        let speaker = if conv.members.is_empty() {
            None
        } else {
            let q = self.group_queue.entry(bot_id).or_default();
            if q.is_empty() {
                q.extend(conv.members.iter().copied().filter(|m| *m != bot_id));
            }
            let mut next = None;
            while let Some(m) = q.pop_front() {
                if self.state.bot(m).is_some() {
                    next = Some(m);
                    break;
                }
            }
            match next {
                Some(m) => Some(m),
                None => return,
            }
        };
        let b = match speaker.and_then(|m| self.state.bot(m).cloned()) {
            Some(member) => member,
            None => conv.clone(),
        };
        let ps = self.state.provider(b.provider);
        // Computer tools are always offered; if they're off for this bot (or this Mac isn't
        // allowed yet), using one pops up a request instead of failing quietly.
        let computers = self.targets_for(&b);
        let names: Vec<String> = computers.iter().map(|t| t.name.clone()).collect();
        let default_computer = if names.contains(&b.default_computer) { b.default_computer.clone() } else { crate::model::BOT_COMPUTER_NAME.to_string() };
        let mut tool_specs = appctl::specs();
        tool_specs.extend(tools::specs_for(&names, &default_computer));
        let devices: Vec<String> = computers.iter().filter(|t| matches!(t.place, tools::Place::Device { .. })).map(|t| t.name.clone()).collect();
        tool_specs.extend(web::specs_for(&devices));
        // Screen tools: the bot's own desktop (when it has one) and this Mac.
        let mut screens = vec![];
        if crate::cloudbox::available() {
            screens.push(crate::model::BOT_COMPUTER_NAME.to_string());
        }
        if crate::computer::screen_supported() {
            screens.push(crate::model::THIS_COMPUTER_NAME.to_string());
        }
        // …and the account's other computers (手腳): their own AnyBot looks and clicks there.
        screens.extend(devices.iter().cloned());
        if cfg!(target_os = "macos") {
            tool_specs.extend(crate::macapps::specs().into_iter().filter(|t| self.state.messages_send || t["name"] != crate::macapps::SEND_MESSAGE));
        }
        tool_specs.extend(crate::mcp::specs());
        tool_specs.extend(crate::phone::specs());
        tool_specs.push(serde_json::json!({"name": "show_card", "description": "Show a tidy card in the chat for things like a flight, a restaurant or place, the weather, a product or an event (the original's life cards). Fill it from what you found; give the source link.",
            "parameters": {"type": "object", "properties": {
                "kind": {"type": "string", "enum": ["flight", "place", "weather", "product", "event", "other"]},
                "title": {"type": "string"}, "subtitle": {"type": "string"},
                "rows": {"type": "array", "items": {"type": "object", "properties": {"label": {"type": "string"}, "value": {"type": "string"}}, "required": ["label", "value"]}},
                "link": {"type": "string"}}, "required": ["kind", "title"]}}));
        tool_specs.push(serde_json::json!({"name": "react", "description": "Put an emoji reaction on the person's latest message, like a friend would (e.g. ❤️ for thanks or good news, 👍 for OK, 😂 for a joke, 🎉 for a win, 👀 when you'll look into it). Use it now and then where it fits; you can still answer in words.",
            "parameters": {"type": "object", "properties": {"emoji": {"type": "string", "description": "One emoji"}}, "required": ["emoji"]}}));
        tool_specs.push(serde_json::json!({"name": "send_file", "description": "Send a file you made (spreadsheet, document, Markdown, web page, picture, PDF…) into the chat as a file card the person can preview and download. Use this to hand over results instead of only saying where the file is.",
            "parameters": {"type": "object", "properties": {"path": {"type": "string", "description": "File path (relative to your folder)"}, "computer": {"type": "string", "enum": names.clone()}}, "required": ["path"]}}));
        tool_specs.push(serde_json::json!({"name": "open_for_person", "description": "Open a file you made (a web page, chart, report, picture, document) on the person's screen so they can see it, or a web address. From the bot's computer it is copied over first.",
            "parameters": {"type": "object", "properties": {"path": {"type": "string", "description": "File path (relative to your folder) or http(s) address"}, "computer": {"type": "string", "enum": names.clone()}}, "required": ["path"]}}));
        if !self.state.remote.host_token.is_empty() {
            tool_specs.push(serde_json::json!({"name": "publish_site", "description": "Publish a web page or a folder with index.html that you made as a public website on the person's AnyBot account server. Publishing again with the same name replaces it. Give the person the address you get back.",
                "parameters": {"type": "object", "properties": {"path": {"type": "string", "description": "Folder with index.html, or one .html file"}, "name": {"type": "string", "description": "Short site name: letters, digits and -"}, "computer": {"type": "string", "enum": names.clone()}}, "required": ["path", "name"]}}));
        }
        if crate::botbrowser::available() {
            tool_specs.extend(crate::vault::specs());
        }
        if b.demos.iter().any(|d| d.shots.iter().any(|s| !s.is_empty())) {
            tool_specs.push(crate::teach::view_step_spec());
        }
        if !screens.is_empty() {
            let default_screen = if screens.contains(&default_computer) { default_computer.clone() } else { screens[0].clone() };
            tool_specs.extend(crate::computer::specs_for(&screens, &default_screen));
        }
        // 看圖小幫手: the person's models that may see pictures, for a bot whose model can't.
        providers::set_eyes(self.eyes());
        let req = ChatRequest {
            kind: b.provider,
            base_url: providers::resolve_base(b.provider, &ps.base_url),
            api_key: providers::resolve_key(b.provider, &ps.api_key),
            model: b.model.clone(),
            system: {
                let mut sys = system_prompt(&b, &self.state, &computers, &default_computer);
                if speaker.is_some() {
                    let names: Vec<String> = conv.members.iter().filter_map(|m| self.state.bot(*m)).map(|x| x.name.clone()).collect();
                    sys.push_str(&format!("\n\n你在群組聊天「{}」裡，成員依序回答：{}。其他成員的發言以【名字】標示。只回答你擅長的部分，補充不同的觀點，不要重複別人說過的；沒有要補充就簡短說一句。", conv.name, names.join("、")));
                }
                sys
            },
            history: group_history(&conv.messages, speaker, &self.state),
            tools: tool_specs,
            session: format!("anybot-bot-{bot_id}"),
        };
        let via = if speaker.is_some() { format!("{} · {} · {}", b.name, b.provider.label(), b.model) } else { format!("{} · {}", b.provider.label(), b.model) };
        if let Some(c) = self.state.bot_mut(bot_id) {
            c.messages.push(Message { author: speaker.unwrap_or(0), ..Message::assistant("", &via) });
        }
        let cancel = Arc::new(AtomicBool::new(false));
        let steer = Arc::new(Mutex::new(Vec::new()));
        let turn_id = format!("turn-{bot_id}-{}", chrono::Utc::now().timestamp_millis());
        let direct = Arc::new(AtomicBool::new(self.direct_on()));
        self.streams.insert(bot_id, Live { cancel: cancel.clone(), started: Instant::now(), last: Instant::now(), produced: false, status: None, paused: false, steer: steer.clone(), turn_id, direct: direct.clone() });
        self.stick_bottom = true;
        let review = self.state.auto_review.then(|| agent::Review { allow: self.state.review_allow_rules.clone(), ask: self.state.review_ask_rules.clone() });
        let job = agent::Job {
            req,
            computers,
            default_computer,
            local_execution: self.local_on(),
            local_locked: !self.managed.local.allows() || self.state.local_never,
            tools_enabled: b.tools_enabled,
            direct,
            grants: {
                let mut g = b.allow_rules.clone();
                if self.state.messages_no_ask {
                    g.push("messages:no-ask".into());
                }
                g
            },
            context_tokens: b.context_tokens.max(4_000),
            via,
            via_name: b.name.clone(),
            steer,
            review,
            demos: b.demos.clone(),
        };
        agent::spawn(job, bot_id, self.tx.clone(), cancel, ctx.clone());
        // (Its eyes start reading while it works; see face_pose.)
        self.mark();
    }

    /// The computers a bot can be told to use (its own, this Mac, then SSH ones).
    fn targets_for(&self, b: &Bot) -> Vec<tools::Target> {
        let mut v = vec![
            tools::Target {
                name: crate::model::BOT_COMPUTER_NAME.into(),
                place: if crate::cloudbox::available() { tools::Place::Box { dir: crate::cloudbox::bot_dir(b.id) } } else { tools::Place::Sealed { root: crate::model::bot_computer_dir(b.id) } },
            },
            tools::Target {
                name: crate::model::THIS_COMPUTER_NAME.into(),
                place: tools::Place::Local { workdir: tools::expand_home(if b.workdir.trim().is_empty() { "~" } else { b.workdir.trim() }) },
            },
        ];
        v.extend(self.state.remote_computers.iter().map(|c| tools::Target { name: c.name.clone(), place: tools::Place::Ssh { target: c.ssh_target.clone(), dir: c.dir.clone() } }));
        // 裝置連結: other AnyBots of this account that allow it.
        v.extend(self.linked_devices().into_iter().filter(|d| !v.iter().any(|t| t.name == d.name)).collect::<Vec<_>>());
        v
    }

    /// Record how a turn ended (success / cancelled / error) and clear its live state.
    fn settle(&mut self, bot_id: u64, outcome: TurnOutcome) {
        // 群組聊天: the next member answers after this one finishes well.
        if self.group_queue.get(&bot_id).map(|q| !q.is_empty()).unwrap_or(false) {
            if outcome == TurnOutcome::Success {
                self.group_next.push(bot_id);
            } else {
                self.group_queue.remove(&bot_id);
            }
        }
        let group_continues = self.group_next.contains(&bot_id);
        if !group_continues {
            self.channels_settled(bot_id, outcome);
        }
        if outcome == TurnOutcome::Success && !self.demo {
            let in_call = self.call_state().map(|c| c.0 == bot_id).unwrap_or(false);
            if let Some(b) = self.state.bot(bot_id).filter(|b| b.speak_replies && !in_call) {
                if let Some(m) = b.messages.iter().rev().find(|m| m.role == Role::Assistant && !m.text.trim().is_empty() && !m.error) {
                    crate::voice::speak_as(&m.text, &b.voice, b.voice_rate);
                }
            }
        }
        if outcome == TurnOutcome::Success {
            let now = self.faces.get(&bot_id).map(|f| f.now()).unwrap_or(0.0);
            self.poke(bot_id, sidebar_ui::Poke::Nod, now);
        }
        let away = self.away() && self.state.notify;
        if let Some(l) = self.streams.remove(&bot_id) {
            if let Some(b) = self.state.bot_mut(bot_id) {
                b.last_turn = Some(TurnSettlement { turn_id: l.turn_id, outcome, settled_at_ms: chrono::Utc::now().timestamp_millis() });
                // 「Bot 完成任務…時通知你」: a banner when it finishes while you're away.
                if outcome == TurnOutcome::Success && away && !self.demo {
                    let last = b.messages.iter().rev().find(|m| m.role == Role::Assistant && !m.text.is_empty()).map(|m| first_line(&m.text, 80)).unwrap_or_default();
                    if !self.headless {
                        notify::banner(&format!("{} 完成了", b.name), &last);
                    }
                    crate::remote::notify(&format!("{} 完成了", b.name), &last, bot_id);
                }
            }
            // Messages that arrived too late to steer start the next turn.
            let leftover: Vec<String> = std::mem::take(&mut *l.steer.lock().unwrap());
            if !leftover.is_empty() {
                self.pending_turns.push((bot_id, leftover));
            }
        }
        self.approvals.remove(&bot_id);
        self.app_pending.remove(&bot_id);
    }

    /// Wake a bot with a message: a new turn when idle, steering when it is already working.
    fn wake(&mut self, ctx: &egui::Context, bot_id: u64, msg: Message) {
        if let Some(l) = self.streams.get(&bot_id) {
            l.steer.lock().unwrap().push(msg.text);
            return;
        }
        let selected = self.state.selected;
        if let Some(b) = self.state.bot_mut(bot_id) {
            b.messages.push(msg);
            if bot_id != selected {
                b.unread = true;
            }
        }
        self.start_reply(ctx, bot_id);
    }

    /// Run due routines (a routine firing is a "wake" turn).
    fn tick_routines(&mut self, ctx: &egui::Context) {
        if self.demo || self.last_tick.elapsed() < std::time::Duration::from_secs(1) {
            return;
        }
        self.last_tick = Instant::now();
        let now = crate::routines::now();
        let mut fire = vec![];
        for b in self.state.bots.iter_mut() {
            if self.streams.contains_key(&b.id) {
                continue; // fires once the bot is idle
            }
            for r in b.routines.iter_mut().filter(|r| !r.paused) {
                if r.next_run.map(|t| t <= now).unwrap_or(false) {
                    r.last_run = Some(now);
                    r.next_run = crate::routines::next_run(&r.schedule, r.created_at, now);
                    fire.push((b.id, appctl::wake_message(r)));
                    break;
                }
            }
        }
        for (id, msg) in fire {
            self.wake(ctx, id, msg);
            self.dirty = true;
        }
        for id in std::mem::take(&mut self.group_next) {
            if !self.streams.contains_key(&id) {
                self.start_reply(ctx, id);
            }
        }
        for (id, texts) in std::mem::take(&mut self.pending_turns) {
            if let Some(b) = self.state.bot_mut(id) {
                for t in texts {
                    b.messages.push(Message::user(&t));
                }
            }
            self.start_reply(ctx, id);
        }
    }

    fn run_app_action(&mut self, ctx: &egui::Context, bot_id: u64, call: AppCall) {
        let out = appctl::apply(&mut self.state, bot_id, &call.name, &call.args);
        // write_page: remember which page the call made, so its card shows under the reply.
        if let Some(pid) = out.page {
            if let Some(c) = self.state.bot_mut(bot_id).and_then(|b| b.messages.iter_mut().rev().take(12).flat_map(|m| m.tool_calls.iter_mut()).find(|c| c.id == call.call_id)) {
                let mut a: serde_json::Value = serde_json::from_str(&c.args).unwrap_or(serde_json::json!({}));
                a["id"] = serde_json::json!(pid);
                // The card shows the page itself; the long content needn't stay twice in the chat.
                if let Some(o) = a.as_object_mut() {
                    o.remove("content");
                }
                c.args = a.to_string();
            }
        }
        if out.theme_changed {
            self.apply_theme(ctx);
        }
        let _ = call.reply.send((out.text, out.ok));
        for (target, msg) in out.wake {
            self.wake(ctx, target, msg);
        }
        self.dirty = true;
    }

    fn stop(&mut self, bot_id: u64) {
        if self.mir.on {
            if self.streams.contains_key(&bot_id) || self.approvals.contains_key(&bot_id) {
                self.mirror_act(serde_json::json!({"bot": bot_id, "action": "stop"}));
            }
            return;
        }
        self.approvals.remove(&bot_id);
        if let Some(call) = self.app_pending.remove(&bot_id) {
            let _ = call.reply.send(("已停止".into(), false));
        }
        if let Some(live) = self.streams.get(&bot_id) {
            live.cancel.store(true, Ordering::Relaxed);
            // Stopping keeps what was typed but not yet read: it becomes the next turn only if sent again.
            live.steer.lock().unwrap().clear();
            self.settle(bot_id, TurnOutcome::Cancelled);
            if let Some(b) = self.state.bot_mut(bot_id) {
                for c in b.messages.iter_mut().rev().take(6).flat_map(|m| m.tool_calls.iter_mut()) {
                    if matches!(c.status, ToolStatus::Waiting | ToolStatus::Running) {
                        c.status = ToolStatus::Denied;
                    }
                }
                if let Some(m) = b.messages.last_mut() {
                    if m.role == Role::Assistant && m.text.is_empty() && m.tool_calls.is_empty() {
                        m.text = "（已停止）".into();
                    }
                }
            }
            self.mark();
        }
    }

    /// "Restart" a stuck bot: stop its turn, approvals and background commands, and mark any
    /// half-finished reply as interrupted so it can be retried. Chats and files stay.
    fn restart_bot(&mut self, bot_id: u64) {
        self.stop(bot_id);
        let stopped = tools::stop_for(&bot_id.to_string());
        if let Some(b) = self.state.bot_mut(bot_id) {
            b.repair_interrupted();
            let name = b.name.clone();
            self.notice = Some(if stopped > 0 { format!("已重新啟動「{name}」，也停止了 {stopped} 個背景指令。") } else { format!("已重新啟動「{name}」。") });
        }
        self.dirty = true;
    }

    /// 直接操作: one switch instead of many. Turns on this Mac, every bot's tools and auto-review,
    /// starts the "always ask" rules with a few safe defaults if there are none, and tells running
    /// turns to stop asking.
    /// The switches as they actually apply: an admin lock (policy) wins over the saved setting.
    fn direct_on(&self) -> bool {
        self.state.direct_mode && self.managed.direct.allows() && self.managed.local.allows()
    }

    fn local_on(&self) -> bool {
        (self.state.local_execution || self.state.direct_mode && self.managed.direct.allows()) && self.managed.local.allows()
    }

    fn enable_direct_mode(&mut self) {
        if !self.managed.direct.allows() || !self.managed.local.allows() {
            self.notice = Some("「直接操作」已由管理員關閉，沒辦法打開。".into());
            return;
        }
        let st = &mut self.state;
        st.direct_mode = true;
        st.local_execution = true;
        st.auto_review = true;
        for b in st.bots.iter_mut() {
            b.tools_enabled = true;
        }
        if st.review_ask_rules.is_empty() {
            st.review_ask_rules = crate::model::DEFAULT_ASK_RULES.iter().map(|s| s.to_string()).collect();
        }
        for l in self.streams.values() {
            l.direct.store(true, Ordering::Relaxed);
        }
        // Other bots waiting on a "may I use the computer?" question can go on too.
        let waiting: Vec<u64> = self.approvals.iter().filter(|(_, a)| a.kind != ApprovalKind::Action).map(|(id, _)| *id).collect();
        for id in waiting {
            if let Some(a) = self.approvals.remove(&id) {
                let _ = a.reply.send(ApprovalAnswer::Always(a.grant.clone()));
            }
        }
        self.notice = Some("已打開「直接操作」：Bot 會直接做事，只有危險操作和你的「一律詢問」規則會停下來問你。".into());
        self.dirty = true;
    }

    fn disable_direct_mode(&mut self) {
        self.state.direct_mode = false;
        for l in self.streams.values() {
            l.direct.store(false, Ordering::Relaxed);
        }
        self.dirty = true;
    }

    fn answer(&mut self, ctx: &egui::Context, bot_id: u64, answer: ApprovalAnswer) {
        if self.mir.on {
            let a = match answer {
                ApprovalAnswer::Once => "once",
                ApprovalAnswer::Always(_) => "always",
                ApprovalAnswer::Reject => "reject",
            };
            self.approvals.remove(&bot_id);
            self.popup_hidden.remove(&bot_id);
            self.mirror_act(serde_json::json!({"bot": bot_id, "action": "answer", "answer": a}));
            return;
        }
        if self.want_direct.replace(false) {
            self.enable_direct_mode();
        }
        if let Some(call) = self.app_pending.remove(&bot_id) {
            self.approvals.remove(&bot_id);
            if answer == ApprovalAnswer::Reject {
                let _ = call.reply.send(("使用者拒絕了這個操作。".into(), false));
            } else {
                self.run_app_action(ctx, bot_id, call);
            }
            self.mark();
            return;
        }
        if let Some(a) = self.approvals.remove(&bot_id) {
            self.popup_hidden.remove(&bot_id);
            if let ApprovalAnswer::Always(g) = &answer {
                match a.kind {
                    // "Always" on these turns the setting on, so it won't ask again.
                    ApprovalKind::EnableTools => {
                        if let Some(b) = self.state.bot_mut(bot_id) {
                            b.tools_enabled = true;
                        }
                    }
                    ApprovalKind::EnableThisComputer => self.state.local_execution = true,
                    ApprovalKind::Action => {
                        if let Some(b) = self.state.bot_mut(bot_id) {
                            if !g.is_empty() && !b.allow_rules.contains(g) {
                                b.allow_rules.push(g.clone());
                            }
                        }
                    }
                }
            }
            let _ = a.reply.send(answer);
            if let Some(l) = self.streams.get_mut(&bot_id) {
                l.paused = false;
                l.last = Instant::now();
            }
            self.mark();
        }
    }

    fn regenerate(&mut self, ctx: &egui::Context, bot_id: u64) {
        if self.mir.on {
            self.mirror_act(serde_json::json!({"bot": bot_id, "action": "regenerate"}));
            return;
        }
        if self.streams.contains_key(&bot_id) {
            return;
        }
        if let Some(b) = self.state.bot_mut(bot_id) {
            while b.messages.last().map(|m| m.role != Role::User).unwrap_or(false) {
                b.messages.pop();
            }
            if b.messages.is_empty() {
                return;
            }
        }
        self.start_reply(ctx, bot_id);
    }

    fn drain_events(&mut self, ctx: &egui::Context) {
        while let Ok((id, ev)) = self.rx.try_recv() {
            // A stopped request may still deliver a few pieces; ignore them.
            if !self.streams.contains_key(&id) {
                continue;
            }
            let selected = self.state.selected;
            if let Some(live) = self.streams.get_mut(&id) {
                live.last = Instant::now();
                match &ev {
                    StreamEvent::Text(_) | StreamEvent::Thinking(_) | StreamEvent::ToolCall(_) => {
                        live.produced = true;
                        live.status = None;
                    }
                    StreamEvent::Retrying(msg) => {
                        live.status = Some(msg.clone());
                        live.started = Instant::now();
                    }
                    // A new model step gets the first-response deadline again.
                    StreamEvent::NextStep(_) => {
                        live.produced = false;
                        live.started = Instant::now();
                        live.status = None;
                    }
                    // Waiting for the person or a running tool is not a stall.
                    StreamEvent::NeedApproval(_) => live.paused = true,
                    StreamEvent::ToolStatus(_, st) => live.paused = matches!(st, ToolStatus::Running | ToolStatus::Waiting),
                    StreamEvent::ToolResult(_) => live.paused = false,
                    _ => {}
                }
            }
            if let StreamEvent::NeedApproval(a) = ev {
                if let Some(b) = self.state.bot_mut(id) {
                    if id != selected {
                        b.unread = true;
                    }
                    if let Some(c) = b.messages.iter_mut().rev().flat_map(|m| m.tool_calls.iter_mut()).find(|c| c.id == a.call_id) {
                        c.status = ToolStatus::Waiting;
                    }
                }
                self.approvals.insert(id, a);
                self.on_new_approval(ctx, id);
                continue;
            }
            if let StreamEvent::React(emoji) = &ev {
                if let Some(b) = self.state.bot_mut(id) {
                    if let Some(i) = b.messages.iter().rposition(|m| m.role == Role::User && !m.wake) {
                        let m = &mut b.messages[i];
                        if !m.reactions.contains(emoji) {
                            m.reactions.push(emoji.clone());
                            self.popped.insert((id, i, emoji.clone()), Instant::now());
                        }
                    }
                }
                self.dirty = true;
                continue;
            }
            if let StreamEvent::Attach(a) = ev {
                if let Some(b) = self.state.bot_mut(id) {
                    if let Some(m) = b.messages.iter_mut().rev().find(|m| m.role == Role::Assistant) {
                        m.attachments.push(a);
                    }
                }
                self.dirty = true;
                continue;
            }
            if let StreamEvent::AppAction(call) = ev {
                match appctl::needs_approval(&call.name, &call.args, &self.state) {
                    Some(reason) => {
                        let (reply, _) = channel();
                        self.approvals.insert(id, Approval { call_id: call.call_id.clone(), tool: call.name.clone(), reason, grant: String::new(), reply, kind: ApprovalKind::Action });
                        self.on_new_approval(ctx, id);
                        self.app_pending.insert(id, call);
                        if let Some(l) = self.streams.get_mut(&id) {
                            l.paused = true;
                        }
                    }
                    None => self.run_app_action(ctx, id, call),
                }
                continue;
            }
            let mut settle_with = None;
            let Some(b) = self.state.bot_mut(id) else { continue };
            match ev {
                StreamEvent::Alive | StreamEvent::Retrying(_) | StreamEvent::NeedApproval(_) | StreamEvent::AppAction(_) | StreamEvent::React(_) | StreamEvent::Attach(_) => continue,
                StreamEvent::Steered(m) => b.messages.push(m),
                StreamEvent::NextStep(via) => b.messages.push(Message::assistant("", &via)),
                StreamEvent::ToolResult(m) => b.messages.push(m),
                StreamEvent::Compacted(n, summary) => {
                    let n = n.min(b.messages.len());
                    b.messages.splice(..n, [summary]);
                }
                StreamEvent::ToolStatus(call_id, st) => {
                    if let Some(c) = b.messages.iter_mut().rev().flat_map(|m| m.tool_calls.iter_mut()).find(|c| c.id == call_id) {
                        c.status = st;
                    }
                }
                other => {
                    let Some(m) = b.messages.last_mut() else { continue };
                    match other {
                        StreamEvent::Text(t) => m.text.push_str(&t),
                        StreamEvent::Thinking(t) => m.thinking.push_str(&t),
                        StreamEvent::ToolCall(c) => m.tool_calls.push(c),
                        StreamEvent::StepDone(full) => {
                            if m.role == Role::Assistant && !m.summary {
                                // Keep statuses the stream already set.
                                let mut full = full;
                                for c in full.tool_calls.iter_mut() {
                                    if let Some(old) = m.tool_calls.iter().find(|o| o.id == c.id) {
                                        c.status = old.status;
                                    }
                                }
                                *m = full;
                            }
                        }
                        StreamEvent::Done => {
                            if m.role == Role::Assistant && m.text.is_empty() && m.tool_calls.is_empty() {
                                m.text = "（沒有回應內容）".into();
                            }
                            if id != selected {
                                b.unread = true;
                            }
                            settle_with = Some(TurnOutcome::Success);
                        }
                        StreamEvent::Error(e) => {
                            if m.role != Role::Assistant || !m.tool_calls.is_empty() {
                                b.messages.push(Message { error: true, ..Message::assistant(&e, "") });
                            } else {
                                if m.text.is_empty() {
                                    m.text = e;
                                } else {
                                    m.text.push_str(&format!("\n\n{e}"));
                                }
                                m.error = true;
                            }
                            settle_with = Some(TurnOutcome::Error);
                        }
                        _ => {}
                    }
                }
            }
            if let Some(o) = settle_with {
                self.settle(id, o);
            }
            self.dirty = true;
        }
    }

    /// Stall rules: SAND-E0402 firstTokenStall (deadline is server-side, estimated here)
    /// and SAND-E0415 streamIdleStall (35 s of silence after output started).
    fn watchdog(&mut self) {
        let first = std::time::Duration::from_secs(providers::FIRST_RESPONSE_TIMEOUT_SECS);
        let idle = std::time::Duration::from_millis(providers::STREAM_IDLE_STALL_MS);
        let stalled: Vec<(u64, &str)> = self
            .streams
            .iter()
            .filter_map(|(id, l)| {
                if l.paused {
                    None
                } else if !l.produced && l.started.elapsed() > first {
                    Some((*id, "模型未能及時開始回應。請重試。"))
                } else if l.produced && l.last.elapsed() > idle {
                    Some((*id, "回應中斷：模型超過 35 秒沒有送出任何內容。"))
                } else {
                    None
                }
            })
            .collect();
        for (id, msg) in stalled {
            if let Some(l) = self.streams.get(&id) {
                l.cancel.store(true, Ordering::Relaxed);
            }
            self.settle(id, TurnOutcome::Error);
            if let Some(m) = self.state.bot_mut(id).and_then(|b| b.messages.last_mut()).filter(|m| m.role == Role::Assistant) {
                if m.text.is_empty() {
                    m.text = msg.into();
                } else {
                    m.text.push_str(&format!("\n\n{msg}"));
                }
                m.error = true;
            }
            self.dirty = true;
        }
    }

    fn fetch_models(&mut self, kind: ProviderKind) {
        // A screen of a brain: the brain has the key, so it asks.
        if self.mir.on {
            let (tx, rx) = channel();
            let s = self.state.remote.clone();
            std::thread::spawn(move || {
                let name = serde_json::to_value(kind).unwrap_or_default();
                let r = crate::remote::sync_post(&s, "models", &serde_json::json!({"provider": name}))
                    .and_then(|v| v["error"].as_str().map(|e| Err(e.to_string())).unwrap_or_else(|| Ok(v["models"].as_array().into_iter().flatten().filter_map(|m| m.as_str().map(String::from)).collect())));
                let _ = tx.send(r);
            });
            self.model_fetch.insert(kind, rx);
            self.fetch_status.insert(kind, "正在請大腦取得模型清單…".into());
            return;
        }
        let ps = self.state.provider(kind);
        let base = providers::resolve_base(kind, &ps.base_url);
        let key = providers::resolve_key(kind, &ps.api_key);
        let (tx, rx) = channel();
        std::thread::spawn(move || {
            let _ = tx.send(providers::list_models(kind, &base, &key));
        });
        self.model_fetch.insert(kind, rx);
        self.fetch_status.insert(kind, "正在取得模型清單…".into());
    }

    fn poll_fetches(&mut self) {
        let mut done = vec![];
        for (k, rx) in &self.model_fetch {
            if let Ok(r) = rx.try_recv() {
                done.push((*k, r));
            }
        }
        for (k, r) in done {
            self.model_fetch.remove(&k);
            match r {
                Ok(list) => {
                    self.fetch_status.insert(k, format!("連線成功，找到 {} 個模型", list.len()));
                    self.state.provider_mut(k).known_models = list;
                    self.mark();
                }
                Err(e) => {
                    self.fetch_status.insert(k, e);
                }
            }
        }
    }

    /// Models to describe pictures with, best first: each provider with a key, its own default
    /// model, then models of it known to see pictures.
    fn eyes(&self) -> Vec<providers::Eyes> {
        use ProviderKind as K;
        let mut v = vec![];
        for kind in [K::Xai, K::Anthropic, K::OpenAi, K::Gemini, K::OpenRouter, K::OpenCodeGo, K::Custom, K::Ollama] {
            let ps = self.state.provider(kind);
            let key = providers::resolve_key(kind, &ps.api_key);
            if kind.needs_key() && key.is_empty() {
                continue;
            }
            if matches!(kind, K::Custom | K::Ollama) && ps.base_url.trim().is_empty() {
                continue;
            }
            let base = providers::resolve_base(kind, &ps.base_url);
            let mut models: Vec<String> = vec![];
            if !ps.default_model.trim().is_empty() {
                models.push(ps.default_model.trim().to_string());
            }
            models.extend(providers::seeing_models(kind).iter().map(|m| m.to_string()));
            models.dedup();
            for m in models {
                v.push(providers::Eyes { kind, base_url: base.clone(), api_key: key.clone(), model: m });
            }
        }
        v
    }

    fn models_for(&self, kind: ProviderKind) -> Vec<String> {
        let ps = self.state.provider(kind);
        let mut v: Vec<String> = if ps.known_models.is_empty() {
            kind.starter_models().iter().map(|s| s.to_string()).collect()
        } else {
            ps.known_models.clone()
        };
        if !ps.default_model.is_empty() && !v.contains(&ps.default_model) {
            v.insert(0, ps.default_model.clone());
        }
        v
    }

    fn import_bot_dialog(&mut self) {
        let (tx, rx) = channel();
        self.share_rx = Some(rx);
        std::thread::spawn(move || {
            if let Some(p) = crate::share::choose_open() {
                let _ = tx.send(std::fs::read_to_string(&p).map_err(|e| e.to_string()));
            }
        });
    }

    fn poll_import(&mut self) {
        let Some(rx) = &self.share_rx else { return };
        let Ok(r) = rx.try_recv() else { return };
        self.share_rx = None;
        let id = self.state.next_id;
        let mut next = self.state.next_routine_id;
        match r.and_then(|t| crate::share::import(&t, id, &mut next, crate::routines::now())) {
            Ok(b) => {
                let paused = b.routines.iter().filter(|r| r.trigger.is_some()).count();
                self.state.next_id += 1;
                self.state.next_routine_id = next;
                self.notice = Some(format!("已匯入「{}」。{}", b.name, if paused > 0 { format!("有 {paused} 個事件觸發的例行任務先暫停了：請跟 Bot 說要用的 Token，再請它繼續。") } else { String::new() }));
                self.state.bots.push(b);
                self.state.selected = id;
                self.mark();
            }
            Err(e) => self.notice = Some(format!("匯入失敗：{e}")),
        }
    }

    fn new_bot(&mut self) {
        let id = self.state.next_id;
        let shape = avatar::SHAPES[(id as usize) % avatar::SHAPES.len()];
        let color = avatar::COLORS[(id as usize) % avatar::COLORS.len()].0;
        let base = self.state.bot(self.state.selected).map(|b| (b.provider, b.model.clone()));
        // The first bot: the service whose key was just set.
        let first = self.ready_provider().unwrap_or(ProviderKind::Xai);
        let (provider, model) = base.unwrap_or_else(|| (first, self.default_model(first)));
        let b = Bot {
            id,
            name: "新 Bot".into(),
            description: String::new(),
            instructions: String::new(),
            shape: shape.into(),
            color: color.into(),
            provider,
            model,
            pinned: false,
            messages: vec![],
            unread: false,
            tools_enabled: false,
            workdir: crate::model::default_workdir(),
            allow_rules: vec![],
            demos: vec![],
            speak_replies: false,
            voice: String::new(),
            voice_rate: 1.0,
            voice_lang: String::new(),
            folder: String::new(),
            memories: vec![],
            members: vec![],
            threads: vec![],
            context_tokens: agent::DEFAULT_CONTEXT_TOKENS,
            routines: vec![],
            last_turn: None,
            default_computer: crate::model::default_computer(),
        };
        self.edit_bot = Some((b, true));
    }

    // ---------- sidebar ----------

    /// Apply the original's drag rule (`QJe`) to a dragged width.
    fn resize_sidebar(&mut self, raw: f32) {
        let st = &mut self.state;
        if st.sidebar_collapsed {
            if raw >= SIDEBAR_EXPAND_FROM {
                st.sidebar_collapsed = false;
                st.sidebar_width = raw.clamp(SIDEBAR_MIN_WIDTH, SIDEBAR_MAX_WIDTH);
            }
        } else if raw < SIDEBAR_COLLAPSE_BELOW {
            st.sidebar_collapsed = true;
        } else {
            st.sidebar_width = raw.clamp(SIDEBAR_MIN_WIDTH, SIDEBAR_MAX_WIDTH);
        }
        self.dirty = true;
    }

    fn sidebar(&mut self, root: &mut egui::Ui) {
        let p = self.pal;
        let collapsed = self.state.sidebar_collapsed;
        let width = if collapsed { SIDEBAR_RAIL_WIDTH } else { self.state.sidebar_width.clamp(SIDEBAR_MIN_WIDTH, SIDEBAR_MAX_WIDTH) };
        let panel = egui::Panel::left("sidebar")
            .exact_size(width)
            .resizable(false)
            .show_separator_line(false)
            .frame(Frame::new().fill(p.sidebar).inner_margin(Margin::symmetric(if collapsed { 8 } else { 10 }, 12)))
            .show(root, |ui| {
                if collapsed {
                    self.rail(ui);
                    return;
                }
                self.sidebar_body(ui);
            });
        // Drag the right edge to resize; narrow it far enough and it folds into the rail.
        let edge = panel.response.rect;
        let handle = egui::Rect::from_min_max(egui::pos2(edge.right() - 3.0, edge.top()), egui::pos2(edge.right() + 3.0, edge.bottom()));
        let r = root.interact(handle, egui::Id::unique("sidebar-resize"), egui::Sense::drag()).on_hover_cursor(egui::CursorIcon::ResizeHorizontal);
        if r.drag_started() {
            self.side_drag = Some(width);
        }
        if let Some(raw) = self.side_drag.as_mut() {
            *raw += r.drag_delta().x;
            let raw = *raw;
            self.resize_sidebar(raw);
        }
        if r.drag_stopped() {
            self.side_drag = None;
        }
        if r.hovered() || r.dragged() {
            root.painter().vline(edge.right(), edge.y_range(), Stroke::new(2.0, p.border));
        }
    }

    /// The folded sidebar: an 88 px rail of bot avatars.
    fn rail(&mut self, ui: &mut egui::Ui) {
        let p = self.pal;
        ui.vertical_centered(|ui| {
            if icon_button(ui, "◨", "展開側邊欄", p).clicked() {
                self.state.sidebar_collapsed = false;
                self.mark();
            }
            if icon_button(ui, "+", "新 Bot", p).clicked() {
                self.new_bot();
            }
            ui.add_space(8.0);
            let mut order: Vec<u64> = vec![self.state.primary_bot];
            order.extend(self.pinned_ids());
            order.extend(self.state.bots.iter().filter(|b| !b.pinned && b.id != self.state.primary_bot).map(|b| b.id));
            egui::ScrollArea::vertical().auto_shrink([false, false]).max_height(ui.available_height() - 40.0).show(ui, |ui| {
                for id in order {
                    let Some(b) = self.state.bot(id).cloned() else { continue };
                    let (rect, resp) = ui.allocate_exact_size(vec2(56.0, 48.0), egui::Sense::click());
                    if self.state.selected == id || resp.hovered() {
                        ui.painter().rect_filled(rect, 10, if self.state.selected == id { p.active } else { p.hover });
                    }
                    avatar::paint(ui.painter(), egui::Rect::from_center_size(rect.center(), vec2(32.0, 32.0)), &b.shape, self.bot_color(&b));
                    if b.unread || self.streams.contains_key(&id) {
                        ui.painter().circle_filled(rect.right_top() + vec2(-8.0, 8.0), 4.0, if b.unread { p.accent } else { p.text3 });
                    }
                    let resp = resp.on_hover_text(&b.name);
                    if resp.clicked() {
                        self.state.selected = id;
                        if let Some(b) = self.state.bot_mut(id) {
                            b.unread = false;
                        }
                        self.mark();
                    }
                    resp.context_menu(|ui| self.bot_menu_items(ui, id));
                }
            });
            ui.with_layout(Layout::bottom_up(Align::Center), |ui| {
                if icon_button(ui, "⚙", "設定", p).clicked() {
                    self.show_settings = true;
                }
            });
        });
    }

    /// A bot's menu (right-click, and ⋯ at the top), grouped like the original's.
    fn bot_menu_items(&mut self, ui: &mut egui::Ui, id: u64) {
        use crate::icons::Icon;
        let p = self.pal;
        let Some(b) = self.state.bot(id).cloned() else { return };
        ui.set_min_width(menu_ui::MENU_W);
        if id != self.state.primary_bot && menu_ui::item(ui, p, Icon::Pin, if b.pinned { "取消釘選" } else { "釘選" }).clicked() {
            self.set_pinned(id, !b.pinned, None);
            ui.close();
        }
        self.folder_menu(ui, id);
        if menu_ui::item(ui, p, Icon::Bell, if b.unread { "標示為已讀" } else { "標示為未讀" }).clicked() {
            if let Some(b) = self.state.bot_mut(id) {
                b.unread = !b.unread;
            }
            self.mark();
            ui.close();
        }
        if id != self.state.primary_bot && menu_ui::item(ui, p, Icon::Star, "設為主要 Bot").clicked() {
            self.state.primary_bot = id;
            self.mark();
            ui.close();
        }
        menu_ui::sep(ui, p);
        if menu_ui::item(ui, p, Icon::Pencil, "編輯 Bot…").clicked() {
            self.edit_bot = Some((b.clone(), false));
            ui.close();
        }
        // 討論串: put this conversation aside and start fresh; earlier ones can come back.
        if menu_ui::item(ui, p, Icon::NewChat, "開始新對話").clicked() {
            self.stop(id);
            if self.mir.on {
                self.mirror_act(serde_json::json!({"bot": id, "action": "new"}));
            } else if let Some(b) = self.state.bot_mut(id) {
                if !b.messages.is_empty() {
                    let title = b.messages.iter().find(|m| m.role == Role::User).map(|m| first_line(&m.text, 24)).unwrap_or_else(|| "對話".into());
                    let msgs = std::mem::take(&mut b.messages);
                    b.threads.insert(0, (title, msgs));
                    b.threads.truncate(50);
                }
            }
            self.mark();
            ui.close();
        }
        let threads: Vec<String> = b.threads.iter().map(|t| t.0.clone()).collect();
        if !threads.is_empty() {
            menu_ui::sub(ui, p, Icon::History, "過去的對話", |ui| {
                for (i, title) in threads.iter().enumerate() {
                    if menu_ui::item_text(ui, p, None, title).clicked() {
                        self.stop(id);
                        if self.mir.on {
                            self.mirror_act(serde_json::json!({"bot": id, "action": "restore", "index": i}));
                        } else if let Some(b) = self.state.bot_mut(id) {
                            let (_, msgs) = b.threads.remove(i);
                            if !b.messages.is_empty() {
                                let cur_title = b.messages.iter().find(|m| m.role == Role::User).map(|m| first_line(&m.text, 24)).unwrap_or_else(|| "對話".into());
                                let cur = std::mem::take(&mut b.messages);
                                b.threads.insert(0, (cur_title, cur));
                            }
                            b.messages = msgs;
                        }
                        self.mark();
                        ui.close();
                    }
                }
            });
        }
        if menu_ui::item(ui, p, Icon::Record, "錄會議").on_hover_text(t("用麥克風錄下會議，結束後轉成文字記錄交給這個 Bot 整理")).clicked() {
            let ctx = ui.ctx().clone();
            self.state.selected = id;
            self.start_meeting(&ctx, id);
            ui.close();
        }
        menu_ui::sep(ui, p);
        // 分享: as a file (look, model, instructions, routines, demonstrations; no chat or keys).
        menu_ui::sub(ui, p, Icon::Share, "分享與匯出", |ui| {
            if menu_ui::item(ui, p, Icon::Share, "匯出 Bot（分享給別人）…").clicked() {
                if let Some(b) = self.state.bot(id) {
                    let (text, name) = (crate::share::export(b), format!("{}.anybot", b.name));
                    let note = self.ch.note.clone();
                    std::thread::spawn(move || {
                        if let Some(path) = crate::share::choose_save(&name) {
                            let path = if path.extension().is_none() { path.with_extension("anybot") } else { path };
                            *note.lock().unwrap() = match std::fs::write(&path, text) {
                                Ok(()) => format!("已匯出到 {}", path.display()),
                                Err(e) => format!("匯出失敗：{e}"),
                            };
                        }
                    });
                    self.notice = Some(t("選好位置後就會存成 .anybot 檔，可以傳給別人匯入。聊天記錄、金鑰和 Token 不會帶出去。"));
                }
                ui.close();
            }
            if menu_ui::item(ui, p, Icon::Download, "匯出文字記錄…").clicked() {
                if let Some(b) = self.state.bot(id) {
                    let (md, name) = (transcript_markdown(b), format!("{} 對話.md", b.name));
                    let note = self.ch.note.clone();
                    std::thread::spawn(move || {
                        if let Some(path) = crate::share::choose_save(&name) {
                            *note.lock().unwrap() = match std::fs::write(&path, md) {
                                Ok(()) => format!("已匯出到 {}", path.display()),
                                Err(e) => format!("匯出失敗：{e}"),
                            };
                        }
                    });
                }
                ui.close();
            }
            if menu_ui::item(ui, p, Icon::Upload, "匯入 Bot…").clicked() {
                self.import_bot_dialog();
                ui.close();
            }
            if menu_ui::item(ui, p, Icon::Copy, "複製對話 ID").clicked() {
                ui.ctx().copy_text(format!("{id}"));
                ui.close();
            }
        });
        menu_ui::sep(ui, p);
        if menu_ui::item(ui, p, Icon::Refresh, "重新啟動這個 Bot").on_hover_text(t("卡住時用：停止它目前的工作和背景指令，聊天記錄和檔案都會保留")).clicked() {
            self.restart_bot(id);
            ui.close();
        }
        if menu_ui::item(ui, p, Icon::Eraser, "清除聊天記錄").clicked() {
            self.stop(id);
            if let Some(b) = self.state.bot_mut(id) {
                b.messages.clear();
            }
            self.mark();
            ui.close();
        }
        if menu_ui::danger(ui, p, Icon::Trash, "刪除").clicked() {
            self.confirm_delete = Some(id);
            ui.close();
        }
    }

    // ---------- main pane ----------

    fn main_pane(&mut self, root: &mut egui::Ui) {
        let p = self.pal;
        let ctx = &root.ctx().clone();
        if let Some(bot) = self.state.bot(self.state.selected).cloned() {
            self.bot_panel(root, &bot);
        }
        egui::CentralPanel::default().frame(Frame::new().fill(p.pane)).show(root, |ui| {
            let id = self.state.selected;
            if self.state.bots.is_empty() {
                self.mirror_banner(ui);
                self.welcome(ui);
                return;
            }
            let Some(bot) = self.state.bot(id).cloned() else {
                ui.centered_and_justified(|ui| ui.label(RichText::new(t("未選取 Bot")).color(p.text3)));
                return;
            };
            self.header(ui, &bot);
            self.mirror_banner(ui);
            // The composer grows with a long draft: keep room for last frame's height.
            let h_id = egui::Id::unique("composer-height");
            let composer_h: f32 = ui.data(|d| d.get_temp(h_id)).unwrap_or(116.0);
            let avail = ui.available_height() - composer_h;
            let w = ui.available_width();
            let col_w = (w - 48.0).min(TRANSCRIPT_MAX_WIDTH);
            let pad = ((w - col_w) / 2.0).max(0.0);
            egui::ScrollArea::vertical()
                .id_salt(("transcript", id))
                .auto_shrink([false, false])
                .max_height(avail)
                .stick_to_bottom(self.stick_bottom)
                .show(ui, |ui| {
                    ui.horizontal(|ui| {
                        ui.add_space(pad);
                        ui.vertical(|ui| {
                            ui.set_width(col_w);
                            ui.add_space(18.0);
                            if bot.messages.is_empty() {
                                self.empty_state(ui, &bot);
                            }
                            let n = bot.messages.len();
                            for (i, m) in bot.messages.iter().enumerate() {
                                let last = i + 1 == n;
                                self.msg_index = i;
                                self.chat_message(ui, ctx, &bot, m, last);
                            }
                            // While it works: the ring and the shimmering phrase.
                            self.working_row(ui, &bot);
                            self.approval_card(ui, ctx, &bot);
                            ui.add_space(16.0);
                        });
                    });
                });
            let top = ui.cursor().top();
            ui.horizontal(|ui| {
                ui.add_space(pad);
                ui.vertical(|ui| {
                    ui.set_width(col_w);
                    self.composer(ui, ctx, &bot);
                });
            });
            let used = ui.cursor().top() - top;
            if (used - composer_h).abs() > 0.5 {
                ui.data_mut(|d| d.insert_temp(h_id, used));
                ui.ctx().request_repaint();
            }
        });
    }

    /// The top of the chat, like the original: no bar — the bot's name in a rounded pill in the
    /// middle (it opens 對話詳細資訊), and 分享 on the right (pills: 1 px border at 6 %, 36–41 px).
    fn header(&mut self, ui: &mut egui::Ui, bot: &Bot) {
        use panel_ui::PanelTab;
        let p = self.pal;
        let color = self.bot_color(bot);
        let (bar, _) = ui.allocate_exact_size(vec2(ui.available_width(), 58.0), egui::Sense::hover());
        // Right: request / working, 分享, ⋯ — laid out from the right edge.
        let mut right = ui.new_child(egui::UiBuilder::new().max_rect(bar.shrink2(vec2(12.0, 10.0))).layout(Layout::right_to_left(Align::Center)));
        right.spacing_mut().item_spacing.x = 8.0;
        let more = pill_icon(&mut right, crate::icons::Icon::More, p).on_hover_text(t("更多"));
        egui::Popup::menu(&more).show(|ui| self.bot_menu_items(ui, bot.id));
        if pill_text(&mut right, &t("分享"), p).on_hover_text(t("匯出 Bot（分享給別人）…")).clicked() {
            let (text, name) = (crate::share::export(bot), format!("{}.anybot", bot.name));
            let note = self.ch.note.clone();
            std::thread::spawn(move || {
                if let Some(path) = crate::share::choose_save(&name) {
                    let path = if path.extension().is_none() { path.with_extension("anybot") } else { path };
                    *note.lock().unwrap() = match std::fs::write(&path, text) {
                        Ok(()) => format!("已匯出到 {}", path.display()),
                        Err(e) => format!("匯出失敗：{e}"),
                    };
                }
            });
        }
        if self.meeting_on() {
            let red = Color32::from_rgb(0xfc, 0x2c, 0x3e);
            if crate::icons::pill(&mut right, crate::icons::Icon::Record, &t("正在錄會議 · 結束"), red, Color32::WHITE, 36.0).on_hover_text(t("停止錄音，轉成文字記錄")).clicked() {
                let ctx = right.ctx().clone();
                self.voice_toggle(&ctx, bot.id);
            }
        }
        if self.approvals.contains_key(&bot.id) {
            if crate::icons::pill(&mut right, crate::icons::Icon::Shield, &t("需要你允許"), p.accent, Color32::WHITE, 36.0).on_hover_text(t("打開請求視窗")).clicked() {
                self.popup_hidden.remove(&bot.id);
            }
        }
        let right_w = bar.right() - right.min_rect().left();
        // Middle: the name pill (face + name), centred, never under the buttons on the right.
        let font = egui::FontId::proportional(14.0);
        let name_w = ui.painter().layout_no_wrap(bot.name.clone(), font.clone(), p.text).size().x;
        let max_pill = (bar.width() - 2.0 * right_w - 24.0).max(120.0);
        let pill_w = (name_w + 52.0).min(max_pill);
        let mut cx = bar.center().x;
        if cx + pill_w / 2.0 > bar.right() - right_w - 8.0 {
            cx = bar.right() - right_w - 8.0 - pill_w / 2.0;
        }
        let rect = egui::Rect::from_center_size(egui::pos2(cx.max(bar.left() + pill_w / 2.0 + 8.0), bar.center().y), vec2(pill_w, 40.0));
        let r = ui.interact(rect, egui::Id::unique(("name-pill", bot.id)), egui::Sense::click());
        ui.painter().rect_filled(rect, 20, if r.hovered() { p.hover } else { p.elevated });
        ui.painter().rect_stroke(rect, 20, Stroke::new(1.0, p.border), egui::StrokeKind::Inside);
        let mut inner = ui.new_child(egui::UiBuilder::new().max_rect(rect.shrink2(vec2(8.0, 0.0))).layout(Layout::left_to_right(Align::Center)));
        inner.spacing_mut().item_spacing.x = 8.0;
        let (face, _) = inner.allocate_exact_size(vec2(26.0, 26.0), egui::Sense::hover());
        let _ = color;
        self.live_face(&mut inner, bot.id, face, true);
        inner.add(egui::Label::new(RichText::new(&bot.name).size(14.0).color(p.text)).truncate().selectable(false));
        let open = self.panel.is_some();
        if r.on_hover_text(t(if open { "關閉對話詳細資訊" } else { "查看對話詳細資訊" })).on_hover_cursor(egui::CursorIcon::PointingHand).clicked() {
            self.panel = if open { None } else { Some(PanelTab::Activity) };
        }
    }

    fn empty_state(&mut self, ui: &mut egui::Ui, bot: &Bot) {
        let p = self.pal;
        ui.add_space(70.0);
        ui.vertical_centered(|ui| {
            avatar::avatar(ui, 72.0, &bot.shape, self.bot_color(bot));
            ui.add_space(10.0);
            ui.label(RichText::new(&bot.name).size(22.0).strong());
            if !bot.description.is_empty() {
                ui.label(RichText::new(&bot.description).color(p.text2));
            }
            ui.add_space(6.0);
            ui.label(RichText::new(format!("使用 {}·{}", bot.provider.label(), bot.model)).size(12.0).color(p.text3));
            if bot.tools_enabled {
                ui.label(RichText::new(format!("可以在「{}」裡查看、修改檔案和執行指令，動手前會先問你", bot.workdir)).size(12.0).color(p.text3));
            }
            let ps = self.state.provider(bot.provider);
            if bot.provider.needs_key() && providers::resolve_key(bot.provider, &ps.api_key).is_empty() {
                ui.add_space(10.0);
                if ui.button(format!("設定 {} 的 API 金鑰", bot.provider.label())).clicked() {
                    self.show_settings = true;
                    self.settings_tab = SettingsTab::Providers;
                    self.settings_provider = bot.provider;
                }
            }
        });
    }

    /// "The bot wants to …": allow once, always allow this kind, or say no.
    /// The question, the details and the buttons, shared by the chat card and the pop-up.
    fn approval_body(&self, ui: &mut egui::Ui, bot: &Bot, big: bool) -> Option<ApprovalAnswer> {
        let p = self.pal;
        let a = self.approvals.get(&bot.id)?;
        let (tool, reason, grant, kind) = (a.tool.clone(), a.reason.clone(), a.grant.clone(), a.kind);
        // "允許 Grok Bot 在 {targetMachineDisplay} 上使用 {app} 嗎？" (eQViQE): name the machine.
        let (reason, machine) = match reason.rsplit_once("\n（在 ") {
            Some((r, m)) => (r.to_string(), m.trim_end_matches(" 上）").to_string()),
            None => (reason.clone(), String::new()),
        };
        let what = if appctl::is_app_tool(&tool) { appctl::label(&tool) } else if crate::macapps::is_mac_tool(&tool) { crate::macapps::label(&tool) } else if crate::computer::is_computer_tool(&tool) { crate::computer::label(&tool) } else if web::is_web_tool(&tool) { web::label(&tool) } else { tools::label(&tool) };
        let title = match kind {
            ApprovalKind::EnableTools => format!("允許 {} 使用電腦工具嗎？", bot.name),
            // Hd1KB+: 允許…在這台電腦上執行任務，而不只是在它自己的電腦上
            ApprovalKind::EnableThisComputer => format!("允許 {} 在你的電腦上執行任務嗎？", bot.name),
            ApprovalKind::Action if machine.is_empty() => format!("允許 {} {}嗎？", bot.name, what),
            ApprovalKind::Action => format!("允許 {} 在 {machine} 上{what}嗎？", bot.name),
        };
        let note = match kind {
            ApprovalKind::EnableTools => Some("這個 Bot 的電腦工具還沒打開。它想做的事："),
            ApprovalKind::EnableThisComputer => Some("「在這台電腦上執行」還沒打開，Bot 平常只在它自己的電腦上做事。它想在你的電腦上："),
            ApprovalKind::Action => None,
        };
        let mut answer = None;
        ui.label(RichText::new(title).strong().size(if big { 17.0 } else { 14.0 }));
        ui.add_space(2.0);
        let (head, detail) = reason.split_once('：').unwrap_or(("", reason.as_str()));
        match note {
            Some(n) => ui.label(RichText::new(n).size(12.5).color(p.text2)),
            None if !head.is_empty() => ui.label(RichText::new(head).size(12.0).color(p.text3)),
            None => ui.label(""),
        };
        Frame::new().fill(p.hover).corner_radius(8).inner_margin(Margin::symmetric(10, 6)).show(ui, |ui| {
            ui.set_width(ui.available_width());
            ui.add(egui::Label::new(RichText::new(detail).monospace().size(12.5).color(p.text)).wrap());
        });
        if !machine.is_empty() && kind != ApprovalKind::Action {
            ui.label(RichText::new(format!("在：{machine}")).size(12.0).color(p.text3));
        }
        ui.add_space(6.0);
        ui.horizontal(|ui| {
            let once = if kind == ApprovalKind::Action { "允許" } else { "允許這一次" };
            if ui.add(egui::Button::new(RichText::new(once).color(p.on_primary)).fill(p.primary).corner_radius(8).min_size(vec2(0.0, if big { 30.0 } else { 0.0 }))).clicked() {
                answer = Some(ApprovalAnswer::Once);
            }
            let always = match kind {
                ApprovalKind::EnableTools => Some("一律允許這個 Bot 使用電腦".to_string()),
                ApprovalKind::EnableThisComputer => Some("一律允許（打開「在這台電腦上執行」）".to_string()),
                ApprovalKind::Action if !grant.is_empty() => Some(format!("一律允許{}", grant_label(&grant))),
                ApprovalKind::Action => None,
            };
            if let Some(label) = always {
                if ui.button(label).clicked() {
                    answer = Some(ApprovalAnswer::Always(grant.clone()));
                }
            }
            if ui.button(t("拒絕")).clicked() {
                answer = Some(ApprovalAnswer::Reject);
            }
        });
        // One click to work like Grok Bot: allow this and stop asking from now on.
        if !self.direct_on() && self.managed.direct.allows() && self.managed.local.allows() {
            ui.add_space(4.0);
            let b = crate::icons::label(ui, crate::icons::Icon::Zap, &t("全部允許，之後直接操作（像 Grok Bot 一樣）"), 13.5, p.accent).interact(egui::Sense::click()).on_hover_cursor(egui::CursorIcon::PointingHand);
            if b.on_hover_text(t("打開「直接操作」：Bot 可以直接使用這台電腦和瀏覽器，不再一個個問你。危險指令、密碼檔和你的「一律詢問」規則仍會擋下來。可在設定 → 電腦關掉。")).clicked() {
                self.want_direct.set(true);
                answer = Some(ApprovalAnswer::Always(grant.clone()));
            }
        }
        answer
    }

    fn approval_card(&mut self, ui: &mut egui::Ui, ctx: &egui::Context, bot: &Bot) {
        let p = self.pal;
        if !self.approvals.contains_key(&bot.id) {
            return;
        }
        let mut answer = None;
        let width = ui.available_width() - 32.0 - 28.0;
        ui.horizontal_top(|ui| {
            ui.add_space(32.0);
            Frame::new().fill(p.elevated).stroke(Stroke::new(2.0, p.accent)).corner_radius(14).inner_margin(Margin::symmetric(14, 12)).show(ui, |ui| {
                ui.vertical(|ui| {
                    ui.set_width(width);
                    answer = self.approval_body(ui, bot, false);
                });
            });
        });
        ui.add_space(10.0);
        if let Some(ans) = answer {
            self.answer(ctx, bot.id, ans);
        }
    }

    /// A new request: show it as a pop-up (even over another bot's chat) and get the person's
    /// attention (the Dock icon bounces when AnyBot isn't in front).
    fn on_new_approval(&mut self, ctx: &egui::Context, bot_id: u64) {
        self.popup_hidden.remove(&bot_id);
        if !self.demo {
            ctx.send_viewport_cmd(egui::ViewportCommand::RequestUserAttention(egui::UserAttentionType::Critical));
            // Away from AnyBot (other app in front, or idle 90 s+): also a macOS banner.
            if self.state.notify && self.away() {
                if let (Some(b), Some(a)) = (self.state.bot(bot_id), self.approvals.get(&bot_id)) {
                    let what = a.reason.split('\n').next().unwrap_or("").to_string();
                    if !self.headless {
                        notify::banner(&format!("{} 需要你允許", b.name), &what);
                    }
                    crate::remote::notify(&format!("{} 需要你允許", b.name), &what, bot_id);
                }
            }
        }
    }

    /// The person isn't looking at AnyBot: window not in front, or no input for 90 s
    /// (the original's presence rule `K4`, idle `Z_e=9e4`).
    fn away(&self) -> bool {
        if self.headless {
            return true;
        }
        notify::should_notify(self.window_focused, self.idle_secs)
    }

    /// Re-read focus every frame and system idle time every 10 s (`uBt=1e4`).
    fn refresh_presence(&mut self, ctx: &egui::Context) {
        self.window_focused = ctx.input(|i| i.viewport().focused.unwrap_or(true));
        if !self.demo && self.last_presence.elapsed().as_secs_f64() >= notify::PRESENCE_POLL_SECS {
            self.last_presence = Instant::now();
            self.idle_secs = notify::system_idle_secs();
        }
    }

    /// The pop-up: a dimmed window with the request in the middle, so it can't be missed.
    fn approval_popup(&mut self, ctx: &egui::Context) {
        let selected = self.state.selected;
        let mut ids: Vec<u64> = self.approvals.keys().copied().filter(|id| !self.popup_hidden.contains(id)).collect();
        ids.sort_by_key(|id| (*id != selected, *id));
        let Some(&bot_id) = ids.first() else { return };
        let Some(bot) = self.state.bot(bot_id).cloned() else { return };
        let p = self.pal;
        let screen = ctx.content_rect();
        egui::Area::new(egui::Id::unique("approval-dim")).order(egui::Order::Foreground).fixed_pos(screen.min).interactable(true).show(ctx, |ui| {
            let (rect, _) = ui.allocate_exact_size(screen.size(), egui::Sense::click());
            ui.painter().rect_filled(rect, 0, Color32::from_black_alpha(if p.pane == LIGHT.pane { 70 } else { 120 }));
        });
        let mut answer = None;
        let mut later = false;
        let mut go = false;
        egui::Window::new("需要你的允許")
            .id(egui::Id::unique("approval-popup"))
            .order(egui::Order::Foreground)
            .collapsible(false)
            .resizable(false)
            .title_bar(false)
            .fixed_size(vec2(440.0, 0.0))
            .anchor(egui::Align2::CENTER_CENTER, vec2(0.0, -20.0))
            .frame(Frame::new().fill(p.elevated).stroke(Stroke::new(2.0, p.accent)).corner_radius(16).inner_margin(Margin::same(18)).shadow(egui::epaint::Shadow { offset: [0, 8], blur: 28, spread: 0, color: Color32::from_black_alpha(60) }))
            .show(ctx, |ui| {
                ui.horizontal(|ui| {
                    avatar::avatar(ui, 28.0, &bot.shape, avatar::color(&bot.color));
                    ui.label(RichText::new(format!("{} 正在等你決定", bot.name)).size(12.5).color(p.text3));
                    if ids.len() > 1 {
                        ui.label(RichText::new(format!("（還有 {} 個請求）", ids.len() - 1)).size(12.0).color(p.text3));
                    }
                });
                ui.add_space(6.0);
                answer = self.approval_body(ui, &bot, true);
                ui.add_space(4.0);
                ui.horizontal(|ui| {
                    if bot_id != selected && small_button(ui, "前往聊天", p).clicked() {
                        go = true;
                    }
                    if small_button(ui, "稍後再決定", p).on_hover_text(t("先關掉這個視窗；聊天裡的卡片還在，Bot 會一直等你")).clicked() {
                        later = true;
                    }
                });
            });
        if let Some(ans) = answer {
            self.answer(ctx, bot_id, ans);
        } else if later {
            self.popup_hidden.insert(bot_id);
        } else if go {
            self.state.selected = bot_id;
            if let Some(b) = self.state.bot_mut(bot_id) {
                b.unread = false;
            }
            self.stick_bottom = true;
        }
    }

    fn composer(&mut self, ui: &mut egui::Ui, ctx: &egui::Context, bot: &Bot) {
        let p = self.pal;
        let streaming = self.streams.contains_key(&bot.id);
        let composer_id = egui::Id::unique(("composer", bot.id));
        let had_focus = ui.memory(|m| m.has_focus(composer_id));
        let mut send_now = false;
        // Enter sends, Shift+Enter is a new line, and Enter while an input method is
        // composing (e.g. picking Chinese characters) is left alone: index.eager-app `mwt` (@2002346).
        let composing = ui.input(|i| i.events.iter().any(|e| matches!(e, egui::Event::Ime(egui::ImeEvent::Preedit { text, .. }) if !text.is_empty())));
        if had_focus && !composing && ui.input_mut(|i| i.consume_key(egui::Modifiers::NONE, Key::Enter)) {
            send_now = true;
        }
        self.attachments_poll(ctx, bot.id, had_focus);
        self.voice_poll();
        let mut draft = self.drafts.remove(&bot.id).unwrap_or_default();
        ui.add_space(4.0);
        // Quote and attachments sit just above the pill.
        if let Some(q) = self.quoting.get(&bot.id).cloned() {
            ui.horizontal(|ui| {
                ui.add_space(14.0);
                let (r, _) = ui.allocate_exact_size(vec2(3.0, 18.0), egui::Sense::hover());
                ui.painter().rect_filled(r, 1, p.accent);
                let short: String = q.lines().next().unwrap_or("").chars().take(60).collect();
                ui.label(RichText::new(format!("{}{short}…", t("引用："))).size(FONT_XS).color(p.text2));
                if ui.add(egui::Button::new(RichText::new("×").size(13.0).color(p.text3)).frame(false)).clicked() {
                    self.quoting.remove(&bot.id);
                }
            });
            ui.add_space(4.0);
        }
        if self.has_pending_attachments(bot.id) {
            ui.horizontal(|ui| {
                ui.add_space(10.0);
                self.pending_chips(ui, bot.id);
            });
            ui.add_space(4.0);
        }
        // The original's input: one 44 px pill — ＋, the words, the mic, and a round button in the
        // bot's colour (voice chat while empty, send ↑ once there is something to send).
        Frame::new()
            .fill(p.elevated)
            .stroke(Stroke::new(1.0, if had_focus { p.border.gamma_multiply(1.8) } else { p.border }))
            .corner_radius(22)
            .inner_margin(Margin { left: 8, right: 8, top: 8, bottom: 8 })
            .show(ui, |ui| {
                ui.set_width(ui.available_width());
                ui.horizontal(|ui| {
                    ui.spacing_mut().item_spacing.x = 8.0;
                    // ＋: 附加檔案 / 教它一項任務 / the model.
                    let plus = round_tool(ui, crate::icons::Icon::Plus, p.hover, p.text2).on_hover_text(t("輸入框操作"));
                    egui::Popup::menu(&plus).show(|ui| {
                        ui.set_min_width(menu_ui::MENU_W);
                        if menu_ui::item(ui, p, crate::icons::Icon::Paperclip, "附加檔案").clicked() {
                            self.pick_attachments(ctx, bot.id);
                            ui.close();
                        }
                        if crate::computer::demo_supported() && menu_ui::item(ui, p, crate::icons::Icon::Record, "教它一項任務").clicked() {
                            self.teach_quick(bot.id);
                            ui.close();
                        }
                        menu_ui::sep(ui, p);
                        if bot.members.is_empty() {
                            self.model_picker(ui, bot);
                        } else {
                            let names: Vec<String> = bot.members.iter().filter_map(|m| self.state.bot(*m)).map(|b| b.name.clone()).collect();
                            ui.label(RichText::new(format!("{}{}", t("成員："), names.join("、"))).size(FONT_XS).color(p.text2));
                        }
                    });
                    let right_w = 28.0 * 2.0 + 8.0 + 4.0;
                    let text_w = (ui.available_width() - right_w).max(60.0);
                    let hint = if self.mir.on && !self.mir.online { t("連不到大腦，現在只能看") } else { t("傳訊息給 {name}").replace("{name}", &bot.name) };
                    ui.allocate_ui_with_layout(vec2(text_w, 28.0), Layout::top_down(Align::Min), |ui| {
                        egui::ScrollArea::vertical().id_salt(("composer_scroll", bot.id)).max_height(160.0).show(ui, |ui| {
                            ui.add_space(4.0);
                            ui.add(egui::TextEdit::multiline(&mut draft).id(composer_id).hint_text(RichText::new(hint).color(p.text3)).frame(Frame::NONE).margin(Margin::ZERO).desired_rows(1).desired_width(text_w).lock_focus(true));
                        });
                    });
                    ui.with_layout(Layout::right_to_left(Align::Max), |ui| {
                        ui.spacing_mut().item_spacing.x = 8.0;
                        let has_text = !draft.trim().is_empty() || self.has_pending_attachments(bot.id);
                        let call = self.call_state();
                        let in_call = call.map(|c| c.0 == bot.id).unwrap_or(false);
                        let colour = self.bot_color(bot);
                        let colour = if colour.r() as u32 + colour.g() as u32 + colour.b() as u32 <= 0x30 * 3 { p.primary } else { colour };
                        let ink = if colour == p.primary { p.on_primary } else { Color32::WHITE };
                        if has_text {
                            let tip = if streaming { "補充給正在進行的工作（Enter）" } else { "傳送訊息" };
                            if round_tool(ui, crate::icons::Icon::ArrowUp, colour, ink).on_hover_text(t(tip)).clicked() {
                                send_now = true;
                            }
                        } else if streaming {
                            if round_tool(ui, crate::icons::Icon::Stop, colour, ink).on_hover_text(t("停止")).clicked() {
                                self.stop(bot.id);
                            }
                        } else {
                            let fill = if in_call { Color32::from_rgb(0xfc, 0x2c, 0x3e) } else { colour };
                            let tip = match call {
                                Some((id, phase)) if id == bot.id => format!("{} · {}", t(phase.label()), t("結束通話")),
                                _ => t("發起語音聊天"),
                            };
                            if round_tool(ui, if in_call { crate::icons::Icon::Stop } else { crate::icons::Icon::Wave }, fill, if in_call { Color32::WHITE } else { ink }).on_hover_text(tip).clicked() {
                                if in_call {
                                    self.call_end();
                                } else if call.is_none() {
                                    self.call_start(bot.id);
                                }
                            }
                        }
                        // 語音輸入: click to record, click again to turn it into text.
                        if let Some(started) = self.voice_recording(bot.id) {
                            let secs = started.elapsed().as_secs();
                            let tt = ui.input(|i| i.time) as f32;
                            let red = Color32::from_rgb(0xfc, 0x2c, 0x3e);
                            let fill = red.gamma_multiply(0.75 + 0.25 * (tt * 3.0).sin().abs());
                            if crate::icons::pill(ui, crate::icons::Icon::Record, &format!("{:02}:{:02}", secs / 60, secs % 60), fill, Color32::WHITE, 28.0).on_hover_text(crate::i18n::t("停止錄音並轉成文字")).clicked() {
                                self.voice_toggle(ctx, bot.id);
                            }
                            ctx.request_repaint_after(std::time::Duration::from_millis(100));
                        } else if self.voice_busy() {
                            chat_ui::spinner(ui, 18.0, p.text3);
                        } else if round_tool(ui, crate::icons::Icon::Mic, p.hover, p.text2).on_hover_text(t("開始語音輸入")).clicked() {
                            self.voice_toggle(ctx, bot.id);
                        }
                        if let Some((id, phase)) = call {
                            if id == bot.id {
                                ui.label(RichText::new(t(phase.label())).size(FONT_XS).color(p.text3));
                            }
                        }
                    });
                });
            });
        ui.add_space(4.0);
        let queued: Vec<String> = self.streams.get(&bot.id).map(|l| l.steer.lock().unwrap().clone()).unwrap_or_default();
        let notice = self.notice.clone();
        ui.vertical_centered(|ui| {
            if let Some(n) = notice.filter(|_| queued.is_empty()) {
                ui.horizontal(|ui| {
                    ui.label(RichText::new(n).size(11.0).color(p.accent));
                    if small_button(ui, "知道了", p).clicked() {
                        self.notice = None;
                    }
                });
            } else if queued.is_empty() {
                // Like the original: nothing under the input.
            } else {
                let first: String = queued.last().unwrap().chars().take(30).collect();
                let more = if queued.len() > 1 { format!(" 等 {} 則", queued.len()) } else { String::new() };
                ui.label(RichText::new(format!("已排入「{first}」{more}，Bot 會在下一步看到")).size(11.0).color(p.accent));
            }
        });
        ui.add_space(10.0);
        self.drafts.insert(bot.id, draft);
        if send_now {
            self.send(ctx, bot.id);
            ui.memory_mut(|m| m.request_focus(composer_id));
        }
    }

    /// Settings → 電腦: AnyBot browser profiles (each with its own logins), switch / open / add.
    fn browser_profiles_section(&mut self, ui: &mut egui::Ui, p: Palette) {
        setting_title(ui, "AnyBot 瀏覽器設定檔", "每個設定檔是一個獨立的瀏覽器視窗，有自己的登入（例如工作和私人帳號）。Bot 會用「使用中」的那個，你也可以在聊天裡叫它換。", p);
        if !crate::botbrowser::available() {
            ui.label(RichText::new(t("需要 Chrome、Brave、Edge 或 Chromium 才能用 AnyBot 自己的瀏覽器。")).size(11.5).color(p.text3));
            return;
        }
        let current = crate::botbrowser::current();
        for name in crate::botbrowser::choices() {
            ui.horizontal(|ui| {
                let mut on = name == current;
                if ui.radio_value(&mut on, true, RichText::new(&name).strong()).clicked() && name != current {
                    let _ = crate::botbrowser::set_current(&name);
                }
                if name == current {
                    ui.label(RichText::new(t("使用中")).size(11.5).color(p.accent));
                }
                if name == crate::botbrowser::PERSON_PROFILE {
                    ui.label(RichText::new(t("你平常的 Chrome，切到哪個設定檔就讀哪個")).size(11.5).color(p.text2));
                    if crate::axread::trusted(false) {
                        crate::icons::label(ui, crate::icons::Icon::Check, &t("輔助使用已打開"), 11.5, p.text3);
                    } else if ui.small_button(t("打開輔助使用")).on_hover_text(t("macOS 要你允許一次，AnyBot 才看得到你的瀏覽器視窗")).clicked() {
                        if !crate::axread::trusted(true) {
                            let _ = std::process::Command::new("open").arg("x-apple.systempreferences:com.apple.preference.security?Privacy_Accessibility").spawn();
                        }
                    }
                    return;
                }
                if ui.small_button(t("開啟視窗")).on_hover_text(t("打開這個設定檔的瀏覽器視窗，在裡面登入網站")).clicked() {
                    let note = self.browser_note.clone();
                    let name = name.clone();
                    *note.lock().unwrap() = format!("正在打開「{name}」…");
                    std::thread::spawn(move || {
                        let r = crate::botbrowser::show(&name);
                        *note.lock().unwrap() = match r {
                            Ok(()) => format!("已打開「{name}」的視窗。在裡面登入一次，之後會記住。"),
                            Err(e) => e,
                        };
                    });
                }
                if name != crate::botbrowser::DEFAULT_PROFILE {
                    if self.confirm_remove_profile.as_deref() == Some(name.as_str()) {
                        if ui.small_button(RichText::new(t("確定移除（登入也會刪掉）")).color(p.danger)).clicked() {
                            *self.browser_note.lock().unwrap() = match crate::botbrowser::remove(&name) {
                                Ok(()) => format!("已移除「{name}」。"),
                                Err(e) => e,
                            };
                            self.confirm_remove_profile = None;
                        }
                        if ui.small_button(crate::i18n::t("取消")).clicked() {
                            self.confirm_remove_profile = None;
                        }
                    } else if ui.small_button(t("移除")).clicked() {
                        self.confirm_remove_profile = Some(name.clone());
                    }
                }
            });
        }
        ui.horizontal(|ui| {
            ui.add(egui::TextEdit::singleline(&mut self.new_browser_profile).hint_text(t("新設定檔名稱，例如 工作")).desired_width(180.0));
            let ok = crate::botbrowser::check_name(&self.new_browser_profile).is_ok();
            if ui.add_enabled(ok, egui::Button::new("新增設定檔")).clicked() {
                let r = crate::botbrowser::add(&self.new_browser_profile).and_then(|n| crate::botbrowser::set_current(&n));
                *self.browser_note.lock().unwrap() = match r {
                    Ok(n) => format!("已新增「{n}」並設為使用中。按「開啟視窗」登入你要的網站。"),
                    Err(e) => e,
                };
                self.new_browser_profile.clear();
            }
        });
        let note = self.browser_note.lock().unwrap().clone();
        if !note.is_empty() {
            ui.label(RichText::new(note).size(11.5).color(p.text2));
        }
        ui.label(RichText::new(t("選「你的瀏覽器」：Bot 像 Grok Bot 一樣從畫面讀你平常的 Chrome（macOS 會請你打開一次「輔助使用」），你在 Chrome 切到哪個設定檔，它就看哪個；讀之前會先問你。其他的是 AnyBot 自己的視窗，各自登入一次就好。")).size(11.0).color(p.text3));
    }

    /// The bot's routines: what repeats, when it runs next, pause / run now / delete.
    fn routines_window(&mut self, ctx: &egui::Context) {
        let Some(bot_id) = self.show_routines else { return };
        let Some(bot) = self.state.bot(bot_id).cloned() else {
            self.show_routines = None;
            return;
        };
        let p = self.pal;
        let mut action: Option<(&str, u64)> = None;
        let body_h = dialog_max_height(ctx) - 48.0;
        let dismissed = dialog(ctx, "routines", &format!("{} {}", bot.name, t("的例行任務")), 500.0, true, p, |ui| {
            dialog_body(ui, "routines-body", body_h, |ui| self.routines_body(ui, &bot, &mut action));
        });
        let open = !dismissed;
        self.routine_action(ctx, bot_id, action);
        if !open {
            self.show_routines = None;
        }
    }

    /// The routines of one bot with 暫停／立即執行／刪除 (the window and the side panel share it).
    fn routines_body(&self, ui: &mut egui::Ui, bot: &Bot, action: &mut Option<(&'static str, u64)>) {
        let p = self.pal;
        if bot.routines.is_empty() {
            ui.label(RichText::new(t("例行任務是這個 Bot 依排程重複執行的任務。請在聊天中請它設定一個。")).color(p.text2));
            ui.add_space(4.0);
            hint(ui, "例如：「每個工作日早上 9 點整理新聞給我」", p);
            return;
        }
        for r in &bot.routines {
            setting_card(ui, p, |ui| {
                ui.horizontal(|ui| {
                    ui.label(RichText::new(&r.title).strong().size(FONT_LG));
                    if r.paused {
                        ui.label(RichText::new(t("已暫停")).size(11.5).color(p.text3));
                    }
                });
                let next = match (r.paused, r.next_run) {
                    (false, Some(t)) => format!(" · 下次 {}", crate::routines::describe_when(t, &r.schedule.timezone)),
                    _ => String::new(),
                };
                match &r.trigger {
                    Some(t) => {
                        crate::icons::label(ui, crate::icons::Icon::Zap, &t.describe(), 12.5, p.text2);
                        if let Some(st) = crate::triggers::statuses().lock().unwrap().get(&r.id).cloned() {
                            ui.label(RichText::new(st).size(11.5).color(p.text3));
                        }
                    }
                    None => {
                        ui.label(RichText::new(format!("{}{next}", crate::routines::describe(&r.schedule))).size(12.5).color(p.text2));
                    }
                }
                hint(ui, r.prompt.clone(), p);
                ui.add_space(4.0);
                ui.horizontal(|ui| {
                    if ui.add(secondary_button(if r.paused { "繼續" } else { "暫停" })).clicked() {
                        *action = Some(("toggle", r.id));
                    }
                    if ui.add(secondary_button("立即執行")).clicked() {
                        *action = Some(("run", r.id));
                    }
                    ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                        if ui.add(egui::Button::new(RichText::new(t("刪除")).color(p.danger)).frame(false)).clicked() {
                            *action = Some(("delete", r.id));
                        }
                    });
                });
            });
        }
        hint(ui, "要新增或修改，直接在聊天裡告訴 Bot。", p);
    }

    fn routine_action(&mut self, ctx: &egui::Context, bot_id: u64, action: Option<(&str, u64)>) {
        if let Some((what, id)) = action {
            let now = crate::routines::now();
            let mut wake = None;
            if let Some(b) = self.state.bot_mut(bot_id) {
                match what {
                    "toggle" => {
                        if let Some(r) = b.routines.iter_mut().find(|r| r.id == id) {
                            r.paused = !r.paused;
                            r.next_run = crate::routines::next_run(&r.schedule, r.created_at, now);
                        }
                    }
                    "run" => {
                        if let Some(r) = b.routines.iter_mut().find(|r| r.id == id) {
                            r.last_run = Some(now);
                            wake = Some(appctl::wake_message(r));
                        }
                    }
                    _ => self.confirm_delete_routine = Some((bot_id, id)),
                }
            }
            if let Some(m) = wake {
                self.state.selected = bot_id;
                self.wake(ctx, bot_id, m);
            }
            self.dirty = true;
        }
    }

    fn model_picker(&mut self, ui: &mut egui::Ui, bot: &Bot) {
        let p = self.pal;
        let label = format!("{} · {}", short_provider(bot.provider), bot.model);
        let mut choice: Option<(ProviderKind, String)> = None;
        let mut open_editor = false;
        let models: Vec<(ProviderKind, bool, Vec<String>)> = ALL_PROVIDERS
            .iter()
            .map(|&kind| {
                let ps = self.state.provider(kind);
                (kind, !kind.needs_key() || !providers::resolve_key(kind, &ps.api_key).is_empty(), self.models_for(kind))
            })
            .collect();
        let row = menu_ui::item_text(ui, p, Some(crate::icons::Icon::Sparkle), &label).on_hover_text(t("選擇這個 Bot 用來思考的模型"));
        egui::containers::menu::SubMenu::new().show(ui, &row, |ui| {
            ui.set_min_width(menu_ui::MENU_W);
            for (kind, ready, list) in &models {
                let title = if *ready { kind.label().to_string() } else { format!("{}（{}）", kind.label(), t("未設定金鑰")) };
                let icon = if *kind == bot.provider { crate::icons::Icon::Check } else { crate::icons::Icon::Sparkle };
                let r = menu_ui::item_text(ui, p, Some(icon), &title);
                egui::containers::menu::SubMenu::new().show(ui, &r, |ui| {
                    ui.set_min_width(220.0);
                    for m in list {
                        let sel = *kind == bot.provider && *m == bot.model;
                        if menu_ui::item_text(ui, p, Some(if sel { crate::icons::Icon::Check } else { crate::icons::Icon::Sparkle }), m).clicked() {
                            choice = Some((*kind, m.clone()));
                            ui.close();
                        }
                    }
                    menu_ui::sep(ui, p);
                    if menu_ui::item(ui, p, crate::icons::Icon::Pencil, "其他模型…").clicked() {
                        choice = Some((*kind, self.default_model(*kind)));
                        open_editor = true;
                        ui.close();
                    }
                });
            }
        });
        if let Some((k, m)) = choice {
            if let Some(b) = self.state.bot_mut(bot.id) {
                b.provider = k;
                b.model = m;
                if open_editor {
                    self.edit_bot = Some((b.clone(), false));
                }
            }
            self.mark();
        }
    }

    fn default_model(&self, kind: ProviderKind) -> String {
        let ps = self.state.provider(kind);
        if ps.default_model.is_empty() { kind.suggested_model().to_string() } else { ps.default_model }
    }

    // ---------- dialogs ----------

    fn bot_editor(&mut self, ctx: &egui::Context) {
        let Some((mut b, is_new)) = self.edit_bot.take() else { return };
        let p = self.pal;
        let mut save = false;
        let mut cancel = false;
        // Title bar ~48 px and footer ~56 px; the form scrolls in between.
        let body_h = dialog_max_height(ctx) - 104.0;
        let title = if is_new { "建立 Bot" } else { "Bot 設定" };
        let dismissed = dialog(ctx, "bot-editor", title, EDITOR_WIDTH, false, p, |ui| {
            dialog_body(ui, "bot-editor-body", body_h, |ui| {
                ui.horizontal_top(|ui| {
                    ui.spacing_mut().item_spacing.x = 16.0;
                    avatar::avatar(ui, 64.0, &b.shape, avatar::color(&b.color));
                    ui.vertical(|ui| {
                        let w = ui.available_width();
                        ui.label(RichText::new(t("Bot 名稱")).size(FONT_XS).color(p.text2));
                        ui.add(egui::TextEdit::singleline(&mut b.name).desired_width(w));
                        field_label(ui, "Bot 描述", p);
                        ui.add(egui::TextEdit::singleline(&mut b.description).hint_text(t("它負責做什麼？")).desired_width(w));
                    });
                });
                ui.add_space(16.0);
                setting_card(ui, p, |ui| {
                    setting_title(ui, "頭像", "", p);
                    let inactive_grey = if p.pane == LIGHT.pane { Color32::from_gray(185) } else { Color32::from_gray(90) };
                    ui.horizontal_wrapped(|ui| {
                        ui.spacing_mut().item_spacing.x = 6.0;
                        for s in avatar::SHAPES {
                            let r = avatar::avatar(ui, 28.0, s, if b.shape == s { avatar::color(&b.color) } else { inactive_grey }).on_hover_text(avatar::shape_label(s));
                            if r.clicked() {
                                b.shape = s.into();
                            }
                        }
                    });
                    ui.add_space(4.0);
                    ui.horizontal_wrapped(|ui| {
                        ui.spacing_mut().item_spacing.x = 6.0;
                        for (key, name, _) in avatar::COLORS {
                            let (rect, r) = ui.allocate_exact_size(vec2(28.0, 28.0), egui::Sense::click());
                            ui.painter().circle_filled(rect.center(), 10.0, avatar::color(key));
                            if b.color == key {
                                ui.painter().circle_stroke(rect.center(), 13.0, Stroke::new(2.0, p.focus));
                            }
                            if r.on_hover_text(name).clicked() {
                                b.color = key.into();
                            }
                        }
                    });
                });
                setting_card(ui, p, |ui| {
                    setting_title(ui, "AI 供應商與模型", "", p);
                    ui.horizontal(|ui| {
                        let before = b.provider;
                        egui::ComboBox::from_id_salt("bot_provider").selected_text(b.provider.label()).width(170.0).show_ui(ui, |ui| {
                            for k in ALL_PROVIDERS {
                                ui.selectable_value(&mut b.provider, k, k.label());
                            }
                        });
                        if b.provider != before {
                            b.model = self.default_model(b.provider);
                        }
                        let models = self.models_for(b.provider);
                        let w = ui.available_width() - 80.0;
                        ui.add(egui::TextEdit::singleline(&mut b.model).hint_text(t("模型名稱")).desired_width(w));
                        egui::ComboBox::from_id_salt("bot_model").selected_text("選擇").width(60.0).show_ui(ui, |ui| {
                            for m in models {
                                let sel = m == b.model;
                                if ui.selectable_label(sel, &m).clicked() {
                                    b.model = m;
                                }
                            }
                        });
                    });
                    let ps = self.state.provider(b.provider);
                    if b.provider.needs_key() && providers::resolve_key(b.provider, &ps.api_key).is_empty() {
                        ui.horizontal(|ui| {
                            ui.label(RichText::new(format!("還沒有設定 {} 的 API 金鑰", b.provider.label())).size(12.0).color(p.danger));
                            if ui.add(egui::Button::new(RichText::new(t("前往設定")).size(12.0).color(p.accent)).frame(false)).clicked() {
                                self.show_settings = true;
                                self.settings_tab = SettingsTab::Providers;
                                self.settings_provider = b.provider;
                            }
                        });
                    }
                });
                setting_card(ui, p, |ui| {
                    setting_title(ui, "電腦操作", "", p);
                    ui.checkbox(&mut b.tools_enabled, t("讓這個 Bot 查看、修改檔案和執行指令"));
                    if b.tools_enabled {
                        ui.add_space(6.0);
                        form_row(ui, "預設電腦", p, |ui| {
                            let names = self.state.computer_names();
                            egui::ComboBox::from_id_salt("default_computer").selected_text(b.default_computer.clone()).width(150.0).show_ui(ui, |ui| {
                                for n in names {
                                    let label = if n == crate::model::THIS_COMPUTER_NAME && !self.state.local_execution { format!("{n}（要先在設定裡允許）") } else { n.clone() };
                                    ui.selectable_value(&mut b.default_computer, n, label);
                                }
                            });
                            ui.label(RichText::new(t("聊天時說「在我的 Mac 上」就會換")).size(11.5).color(p.text3));
                        });
                        form_row(ui, "起始資料夾", p, |ui| {
                            ui.add(egui::TextEdit::singleline(&mut b.workdir).hint_text(t("在你的電腦上，例如 ~/Documents/專案")).desired_width(ui.available_width()));
                        });
                        form_row(ui, "模型可讀長度", p, |ui| {
                            egui::ComboBox::from_id_salt("ctx_tokens").selected_text(format!("{}K tokens", b.context_tokens / 1000)).width(150.0).show_ui(ui, |ui| {
                                for t in [32_000u64, 128_000, 200_000, 400_000, 1_000_000] {
                                    ui.selectable_value(&mut b.context_tokens, t, format!("{}K tokens", t / 1000));
                                }
                            });
                            ui.label(RichText::new(t("用到 70% 時會把舊對話整理成摘要")).size(11.5).color(p.text3));
                        });
                        ui.add_space(2.0);
                        hint(ui, "在 Bot 的電腦上可以自由做事（看不到你的檔案）；在你的電腦上，改檔案和會改變東西的指令會先問你。密碼和金鑰檔一律不碰。", p);
                        if !b.allow_rules.is_empty() {
                            ui.add_space(6.0);
                            ui.label(RichText::new(t("已設定「一律允許」")).size(FONT_XS).color(p.text2));
                            let mut remove = None;
                            ui.horizontal_wrapped(|ui| {
                                for (i, g) in b.allow_rules.iter().enumerate() {
                                    let chip = egui::Button::new(RichText::new(format!("{}  ×", grant_label(g).trim_matches(['「', '」']))).size(12.5)).fill(p.elevated).stroke(Stroke::new(1.0, p.border)).corner_radius(14);
                                    if ui.add(chip).on_hover_text(t("移除這個允許")).clicked() {
                                        remove = Some(i);
                                    }
                                }
                            });
                            if let Some(i) = remove {
                                b.allow_rules.remove(i);
                            }
                        }
                    }
                });
                setting_card(ui, p, |ui| {
                    setting_title(ui, "指示", "Bot 應該記得的事、說話風格…", p);
                    ui.add(egui::TextEdit::multiline(&mut b.instructions).hint_text(t("例如：用繁體中文回答，簡短一點。")).desired_rows(4).desired_width(f32::INFINITY));
                });
                if !b.members.is_empty() {
                    let others: Vec<(u64, String)> = self.state.bots.iter().filter(|x| x.id != b.id && x.members.is_empty()).map(|x| (x.id, x.name.clone())).collect();
                    setting_card(ui, p, |ui| {
                        setting_title(ui, "群組成員", "你傳訊息後，勾選的 Bot 依序回答（每個用自己的模型和設定），後面的會看到前面的回答。這個群組自己的模型不會用到。", p);
                        for (id, name) in others {
                            let mut on = b.members.contains(&id);
                            if ui.checkbox(&mut on, name).changed() {
                                if on {
                                    b.members.push(id);
                                } else if b.members.len() > 1 {
                                    b.members.retain(|m| *m != id);
                                }
                            }
                        }
                    });
                }
                setting_card(ui, p, |ui| {
                    setting_title(ui, "記得的事", "你在聊天裡請 Bot 記住的事（「記住…」），每次聊天都會帶著。", p);
                    if b.memories.is_empty() {
                        hint(ui, "還沒有。跟 Bot 說「記住我喜歡靠窗的座位」試試看。", p);
                    }
                    let mut remove = None;
                    for (i, m) in b.memories.iter().enumerate() {
                        ui.horizontal(|ui| {
                            ui.add(egui::Label::new(RichText::new(format!("{}. {m}", i + 1)).size(FONT_SM)).wrap());
                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                                if ui.add(egui::Button::new(RichText::new(t("忘記")).size(12.0).color(p.text3)).frame(false)).clicked() {
                                    remove = Some(i);
                                }
                            });
                        });
                    }
                    if let Some(i) = remove {
                        b.memories.remove(i);
                    }
                });
            });
            dialog_footer(ui, p, |ui| {
                ui.checkbox(&mut b.pinned, t("釘選到側邊欄"));
                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                    if ui.add_enabled(!b.name.trim().is_empty() && !b.model.trim().is_empty(), primary_button(if is_new { "建立 Bot" } else { "儲存" }, p)).clicked() {
                        save = true;
                    }
                    if ui.add(secondary_button("取消")).clicked() {
                        cancel = true;
                    }
                });
            });
        });
        let open = !dismissed;
        if save {
            b.name = b.name.trim().to_string();
            b.model = b.model.trim().to_string();
            if is_new {
                self.state.next_id += 1;
                self.state.selected = b.id;
                self.state.bots.push(b);
            } else if let Some(slot) = self.state.bot_mut(b.id) {
                // Keep messages that arrived while the editor was open.
                let msgs = std::mem::take(&mut slot.messages);
                *slot = b;
                slot.messages = msgs;
            }
            self.mark();
        } else if open && !cancel {
            self.edit_bot = Some((b, is_new));
        }
    }

    fn settings(&mut self, ctx: &egui::Context) {
        if !self.show_settings {
            self.settings_was_open = false;
            self.vault.dialog = None;
            return;
        }
        self.vault_dialogs(ctx);
        // Re-read admin locks each time Settings opens.
        if !self.settings_was_open && !self.demo {
            self.managed = policy::read();
        }
        self.settings_was_open = true;
        let p = self.pal;
        let mut fetch: Option<ProviderKind> = None;
        let mut theme_changed = false;
        let mut relaunch = false;
        let max_h = dialog_max_height(ctx).min(SETTINGS_HEIGHT);
        // The title bar is about 48 px; the rest is the page list and the page.
        let page_h = max_h - 48.0;
        let close = dialog(ctx, "settings", "設定", SETTINGS_WIDTH, true, p, |ui| {
            ui.horizontal_top(|ui| {
                ui.spacing_mut().item_spacing.x = 0.0;
                Frame::new().fill(p.sidebar).corner_radius(CornerRadius { sw: 16, ..Default::default() }).inner_margin(Margin::symmetric(10, 12)).show(ui, |ui| {
                    // The page list narrows with a small window so the page keeps its room.
                    let nav_w = if ctx.content_rect().width() < SETTINGS_WIDTH + 40.0 { 118.0 } else { SETTINGS_NAV_WIDTH };
                    ui.set_width(nav_w - 20.0);
                    ui.set_min_height(page_h - 24.0);
                    ui.vertical(|ui| {
                    ui.spacing_mut().item_spacing.y = 2.0;
                    use crate::icons::Icon;
                    for (tab, name, icon) in [(SettingsTab::General, "一般", Icon::Gear), (SettingsTab::Providers, "模型", Icon::Sparkle), (SettingsTab::Channels, "整合", Icon::Chat), (SettingsTab::Computers, "電腦", Icon::Monitor), (SettingsTab::Review, "權限", Icon::Shield), (SettingsTab::Vault, "保險庫", Icon::Vault), (SettingsTab::Updates, "更新", Icon::CloudDownload)] {
                        let (rect, r) = ui.allocate_exact_size(vec2(ui.available_width(), 32.0), egui::Sense::click());
                        let on = self.settings_tab == tab || (tab == SettingsTab::General && self.settings_tab == SettingsTab::Remote);
                        if on || r.hovered() {
                            ui.painter().rect_filled(rect, 8, if on { p.active } else { p.hover });
                        }
                        let col = if on { p.text } else { p.text2 };
                        crate::icons::paint(ui.painter(), egui::Rect::from_center_size(rect.left_center() + vec2(18.0, 0.0), vec2(16.0, 16.0)), icon, col);
                        ui.painter().text(rect.left_center() + vec2(34.0, 0.0), egui::Align2::LEFT_CENTER, t(name), egui::FontId::proportional(FONT_BASE), col);
                        if r.on_hover_cursor(egui::CursorIcon::PointingHand).clicked() {
                            self.settings_tab = tab;
                        }
                    }
                    });
                });
                let r = ui.min_rect();
                ui.painter().vline(r.right(), r.y_range(), Stroke::new(1.0, p.border));
                ui.vertical(|ui| {
                    ui.spacing_mut().item_spacing = vec2(8.0, 6.0);
                    dialog_body(ui, ("settings-page", self.settings_tab as u8), page_h, |ui| match self.settings_tab {
                        SettingsTab::General => {
                            section(ui, "帳戶", p);
                            let acct = if self.state.remote.host_token.is_empty() { t("尚未登入帳號 · 手機、帳號、團隊、備份") } else { format!("{} · {}", self.state.remote.relay_user, self.state.remote.relay_url) };
                            setting_row(ui, p, "帳戶", &acct, |ui| {
                                if ui.add(secondary_button("管理")).clicked() {
                                    self.settings_tab = SettingsTab::Remote;
                                }
                            });
                            section(ui, "外觀", p);
                            setting_row(ui, p, "主題", "為 AnyBot 選擇淺色或深色外觀", |ui| {
                                for (th, n) in [(Theme::System, "跟隨系統"), (Theme::Dark, "深色"), (Theme::Light, "淺色")] {
                                    if ui.selectable_value(&mut self.state.theme, th, t(n)).clicked() {
                                        theme_changed = true;
                                    }
                                }
                            });
                            setting_row(ui, p, "強調色", "用 Bot 的顏色為 1:1 Bot 訊息和卡片上色，或保持黑色", |ui| {
                                for (a, n) in [(Accent::Black, "黑色"), (Accent::BotColor, "Bot 顏色")] {
                                    if ui.selectable_value(&mut self.state.accent, a, t(n)).clicked() {
                                        self.dirty = true;
                                    }
                                }
                            });
                            setting_row(ui, p, "字型", "AnyBot 畫面使用的字型", |ui| {
                                let cur = crate::font_choice();
                                for (v, n) in [("system", "系統字型"), ("huninn", "粉圓體")] {
                                    if ui.selectable_label(cur == v, t(n)).clicked() && cur != v {
                                        if let Some(d) = State::path().parent() {
                                            let _ = std::fs::create_dir_all(d);
                                            let _ = std::fs::write(d.join("font.txt"), v);
                                        }
                                        crate::load_fonts(ctx);
                                    }
                                }
                            });
                            setting_row(ui, p, "語言", "選擇 AnyBot 選單和 Bot 回答使用的語言", |ui| {
                                let cur = self.state.language.clone();
                                let shown = if cur == "auto" { format!("{}（{}）", t("自動偵測"), crate::i18n::endonym(&crate::i18n::system())) } else { crate::i18n::endonym(&cur).to_string() };
                                egui::ComboBox::from_id_salt("language").selected_text(shown).height(360.0).show_ui(ui, |ui| {
                                    let mut pick = |ui: &mut egui::Ui, v: &str, label: String| {
                                        if ui.selectable_label(cur == v, label).clicked() {
                                            self.state.language = v.to_string();
                                            crate::i18n::set(v);
                                            self.dirty = true;
                                        }
                                    };
                                    pick(ui, "auto", t("自動偵測"));
                                    let mut rows: Vec<_> = crate::i18n::LANGS.to_vec();
                                    rows.sort_by(|a, b| a.1.cmp(b.1));
                                    for (tag, endo, eng) in rows {
                                        pick(ui, tag, if endo == eng { endo.to_string() } else { format!("{endo}  ·  {eng}") });
                                    }
                                });
                            });
                            if !matches!(crate::i18n::lang().as_str(), "zh-TW" | "zh-CN" | "en" | "ja") {
                                hint(ui, "選單會用英文顯示；Bot 會用你選的語言回答。", p);
                            }
                            section(ui, "通知", p);
                            setting_row(ui, p, "通知", "Bot 完成任務或等你處理時通知你", |ui| {
                                if ui.add(egui::Checkbox::without_text(&mut self.state.notify)).changed() {
                                    self.dirty = true;
                                }
                            });
                            hint(ui, "視窗不在最前面，或 90 秒沒有動鍵盤滑鼠，就會通知。登入帳號後也會推播到手機。", p);
                            section(ui, "Bot", p);
                            setting_row(ui, p, "時區", "設定 Bot 用於排程和提醒的時區", |ui| {
                                if ui.add(egui::TextEdit::singleline(&mut self.state.timezone).desired_width(150.0)).changed() {
                                    self.dirty = true;
                                }
                                if ui.add(secondary_button("用這台電腦的")).clicked() {
                                    self.state.timezone = crate::routines::local_timezone();
                                    self.dirty = true;
                                }
                            });
                            if self.state.timezone.parse::<chrono_tz::Tz>().is_err() {
                                ui.label(RichText::new(t("看不懂這個時區，請用像 Asia/Taipei 這樣的名稱")).size(11.5).color(p.danger));
                            }
                            section(ui, "系統", p);
                            setting_row(ui, p, "資料", "聊天記錄和金鑰只存在這台電腦上", |ui| {
                                if ui.add(secondary_button(if cfg!(target_os = "macos") { "在 Finder 中顯示" } else { "打開所在資料夾" })).clicked() {
                                    crate::preview::reveal(&State::path());
                                }
                            });
                        }
                        SettingsTab::Updates => {
                            section(ui, "AnyBot 更新", p);
                            setting_row(ui, p, "版本", &version_label(self.exe_built), |ui| {
                                if let Some(tm) = self.newer_build {
                                    ui.label(RichText::new(format!("{}{}", t("有更新的版本："), version_label(Some(tm)))).size(12.0).color(p.accent));
                                } else {
                                    ui.label(RichText::new(t("已是最新版本")).size(12.0).color(p.text3));
                                }
                            });
                            setting_row(ui, p, "自動更新", "在你離開時自動換成新版本，你的 Bot 和工作都會保留", |ui| {
                                if ui.add(egui::Checkbox::without_text(&mut self.state.auto_update_when_away)).changed() {
                                    self.dirty = true;
                                }
                            });
                            hint(ui, "螢幕鎖定或螢幕保護程式開著、10 分鐘沒動作、而且沒有 Bot 在工作時，才會自己換成新版本。", p);
                            setting_row(ui, p, "重新啟動", "App 不太對勁時用：進行中的工作會停下，聊天記錄都會保留", |ui| {
                                let label = if self.relaunching { "正在重新啟動…" } else { "重新啟動 AnyBot" };
                                if ui.add_enabled(!self.relaunching, secondary_button(label)).clicked() {
                                    relaunch = true;
                                }
                            });
                        }
                        SettingsTab::Vault => {
                            self.vault_page(ui);
                        }
                        SettingsTab::Computers => {
                            self.computers_page(ui);
                        }
                        SettingsTab::Remote => {
                            if ui.add(egui::Button::new(RichText::new(format!("‹ {}", t("一般"))).size(FONT_SM).color(p.text2)).frame(false)).clicked() {
                                self.settings_tab = SettingsTab::General;
                            }
                            self.remote_page(ui, ctx);
                        }
                        SettingsTab::Channels => {
                            section(ui, "訊息管道", p);
                            self.channels_page(ui, ctx);
                            section(ui, "連接器", p);
                            self.connectors_page(ui, ctx);
                        }
                        SettingsTab::Review => {
                            Frame::new().fill(p.accent.gamma_multiply(0.07)).stroke(Stroke::new(1.0, p.accent.gamma_multiply(0.45))).corner_radius(12).inner_margin(Margin::symmetric(16, 14)).show(ui, |ui| {
                                ui.set_width(ui.available_width());
                                crate::icons::label(ui, crate::icons::Icon::Zap, &t("直接操作（像 Grok Bot 一樣）"), FONT_BASE, p.text);
                                hint(ui, "一個開關：讓 Bot 直接使用這台電腦和你的瀏覽器，不再一個個問你", p);
                                ui.add_space(4.0);
                                let allowed = self.managed.direct.allows() && self.managed.local.allows();
                                let mut on = self.direct_on();
                                if ui.add_enabled(allowed, egui::Checkbox::new(&mut on, t("打開直接操作"))).changed() {
                                    if on {
                                        self.enable_direct_mode();
                                    } else {
                                        self.disable_direct_mode();
                                    }
                                }
                                if !allowed {
                                    crate::icons::label(ui, crate::icons::Icon::Lock, &t("由你的管理員設定，無法變更"), 12.0, p.danger);
                                }
                                hint(ui, "仍會擋下：危險指令（sudo、格式化…）、密碼和金鑰檔、AnyBot 自己的資料，以及你在「自動審核」寫的「一律詢問」規則（預設：刪除檔案、付款、用你的帳號發文或傳訊息）。macOS 第一次讓 AnyBot 控制瀏覽器時還是會自己問一次，按「好」就行。", p);
                            });
                            ui.add_space(12.0);
                            setting_card(ui, p, |ui| {
                                setting_title(ui, "自動審核", "依照自訂規則審核 Bot 的操作", p);
                                if ui.checkbox(&mut self.state.auto_review, t("開啟自動審核")).changed() {
                                    self.dirty = true;
                                }
                                hint(ui, "為每種操作寫一條簡短的自然語言規則。規則衝突時，「先詢問」優先。這些規則只對你生效。內建的安全檢查一律有效。", p);
                                if !self.state.auto_review {
                                    hint(ui, "自動審核關閉時不會使用規則", p);
                                }
                            });
                            for (title, desc, which) in [("「無需詢問直接允許」規則", "操作符合這些規則時，自動繼續", 0), ("「一律詢問」規則", "操作符合這些規則時，停下來詢問", 1)] {
                                setting_card(ui, p, |ui| {
                                    setting_title(ui, title, desc, p);
                                    let rules = if which == 0 { &mut self.state.review_allow_rules } else { &mut self.state.review_ask_rules };
                                    let mut remove = None;
                                    for (i, r) in rules.iter().enumerate() {
                                        Frame::new().fill(p.elevated).corner_radius(8).inner_margin(Margin::symmetric(10, 4)).show(ui, |ui| {
                                            ui.set_width(ui.available_width());
                                            ui.horizontal(|ui| {
                                                ui.label(r);
                                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                                                    if ui.add(egui::Button::new(RichText::new(t("刪除")).size(12.0).color(p.text3)).frame(false)).clicked() {
                                                        remove = Some(i);
                                                    }
                                                });
                                            });
                                        });
                                    }
                                    if let Some(i) = remove {
                                        rules.remove(i);
                                        self.dirty = true;
                                    }
                                    let draft = if which == 0 { &mut self.new_allow_rule } else { &mut self.new_ask_rule };
                                    ui.add_space(2.0);
                                    ui.horizontal(|ui| {
                                        let w = ui.available_width() - 96.0;
                                        ui.add(egui::TextEdit::singleline(draft).hint_text(if which == 0 { "例如：在工作資料夾裡建立文字檔" } else { "例如：刪除任何檔案" }).desired_width(w));
                                        if ui.add_enabled(!draft.trim().is_empty(), secondary_button("新增規則")).clicked() {
                                            rules.push(draft.trim().to_string());
                                            draft.clear();
                                            self.dirty = true;
                                        }
                                    });
                                });
                            }
                        }
                        SettingsTab::Providers => {
                            ui.horizontal_top(|ui| {
                                ui.vertical(|ui| {
                                    ui.set_width(PROVIDER_LIST_WIDTH);
                                    ui.spacing_mut().item_spacing.y = 2.0;
                                    for k in ALL_PROVIDERS {
                                        let ps = self.state.provider(k);
                                        let ready = !k.needs_key() || !providers::resolve_key(k, &ps.api_key).is_empty();
                                        let (rect, r) = ui.allocate_exact_size(vec2(PROVIDER_LIST_WIDTH, 32.0), egui::Sense::click());
                                        let on = self.settings_provider == k;
                                        if on || r.hovered() {
                                            ui.painter().rect_filled(rect, 8, if on { p.active } else { p.hover });
                                        }
                                        let dot = rect.left_center() + vec2(14.0, 0.0);
                                        if ready {
                                            ui.painter().circle_filled(dot, 4.0, Color32::from_rgb(0x2e, 0xa0, 0x43));
                                        } else {
                                            ui.painter().circle_stroke(dot, 3.5, Stroke::new(1.2, p.text3));
                                        }
                                        ui.painter().text(rect.left_center() + vec2(28.0, 0.0), egui::Align2::LEFT_CENTER, k.label(), egui::FontId::proportional(FONT_BASE), if on { p.text } else { p.text2 });
                                        let tip = if ready { "已可使用" } else { "還沒設定金鑰" };
                                        if r.on_hover_text(tip).clicked() {
                                            self.settings_provider = k;
                                        }
                                    }
                                });
                                ui.add_space(16.0);
                                ui.vertical(|ui| {
                                    let k = self.settings_provider;
                                    let w = ui.available_width();
                                    ui.label(RichText::new(k.label()).strong().size(FONT_XL));
                                    hint(ui, k.key_help(), p);
                                    ui.add_space(6.0);
                                    let ps = self.state.provider_mut(k);
                                    let mut changed = false;
                                    if k.needs_key() || k == ProviderKind::Custom {
                                        field_label(ui, "API 金鑰", p);
                                        changed |= ui.add(egui::TextEdit::singleline(&mut ps.api_key).password(true).hint_text(k.env_var().map(|v| format!("貼上金鑰，或設定環境變數 {v}")).unwrap_or_else(|| "（選填）".into())).desired_width(w)).changed();
                                    }
                                    field_label(ui, "服務網址", p);
                                    changed |= ui.add(egui::TextEdit::singleline(&mut ps.base_url).hint_text(k.default_base_url()).desired_width(w)).changed();
                                    field_label(ui, "新 Bot 預設模型", p);
                                    changed |= ui.add(egui::TextEdit::singleline(&mut ps.default_model).hint_text(k.suggested_model()).desired_width(w)).changed();
                                    let count = ps.known_models.len();
                                    if changed {
                                        self.dirty = true;
                                    }
                                    ui.add_space(12.0);
                                    ui.horizontal(|ui| {
                                        let busy = self.model_fetch.contains_key(&k);
                                        if ui.add_enabled(!busy, secondary_button("測試連線並取得模型清單")).clicked() {
                                            fetch = Some(k);
                                        }
                                        if busy {
                                            ui.spinner();
                                        }
                                    });
                                    if let Some(s) = self.fetch_status.get(&k) {
                                        hint(ui, s.clone(), p);
                                    } else if count > 0 {
                                        hint(ui, format!("已記住 {count} 個模型"), p);
                                    }
                                });
                            });
                        }
                    });
                });
            });
        });
        let open = !close;
        if let Some(k) = fetch {
            self.fetch_models(k);
        }
        if theme_changed {
            self.apply_theme(ctx);
            self.dirty = true;
        }
        self.show_settings = open;
        if relaunch {
            self.relaunch(ctx);
        }
    }

    /// Every 10 s, see whether a newer build replaced the program file (then the banner shows).
    fn check_for_newer_build(&mut self) {
        if self.demo {
            return;
        }
        // Noticing a new build is a cheap file check, so the banner keeps up quickly (estimated 10 s).
        if self.last_build_check.elapsed().as_secs() >= 10 {
            self.last_build_check = Instant::now();
            self.newer_build = match (exe_modified(), self.exe_built) {
                (Some(now), Some(started)) if now > started => Some(now),
                _ => None,
            };
        }
        // Switching to it by itself follows the original's schedule and away rule.
        if Instant::now() >= self.next_update_apply {
            let jitter = (chrono::Utc::now().timestamp_subsec_nanos() as f64) / 1e9;
            self.next_update_apply = Instant::now() + std::time::Duration::from_secs(notify::next_update_check_secs(jitter));
            let bots_idle = self.streams.is_empty() && self.approvals.is_empty();
            let ready = self.newer_build.is_some();
            if ready
                && notify::should_apply_update_now(
                    self.state.auto_update_when_away,
                    ready,
                    notify::screen_locked(),
                    notify::screensaver_active(),
                    notify::system_idle_secs(),
                    bots_idle,
                )
            {
                self.relaunch_requested = true;
            }
        }
    }

    /// Save, start a fresh copy of the app, and close this one.
    fn relaunch(&mut self, ctx: &egui::Context) {
        let ids: Vec<u64> = self.streams.keys().copied().collect();
        for id in ids {
            self.stop(id);
        }
        tools::stop_all();
        crate::cloudbox::shutdown();
        crate::mcp::shutdown();
        if !self.demo {
            self.state.save();
        }
        match std::env::current_exe().and_then(|exe| relaunch_command(std::process::id(), &exe).spawn()) {
            Ok(_) => {
                self.relaunching = true;
                ctx.send_viewport_cmd(egui::ViewportCommand::Close);
            }
            Err(e) => self.notice = Some(format!("沒辦法重新啟動：{e}。請手動關掉再打開 AnyBot。")),
        }
    }

    fn delete_dialog(&mut self, ctx: &egui::Context) {
        let Some(id) = self.confirm_delete else { return };
        let name = self.state.bot(id).map(|b| b.name.clone()).unwrap_or_default();
        let mut close = false;
        let p = self.pal;
        let dismissed = dialog(ctx, "delete-bot", "刪除 Bot？", 380.0, true, p, |ui| {
            dialog_body(ui, "delete-bot-body", 200.0, |ui| {
                ui.label(RichText::new(format!("這會刪除「{name}」和它的聊天記錄。此操作無法復原。")).color(p.text2));
            });
            dialog_footer(ui, p, |ui| { ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                if ui.add(danger_button("刪除", p)).clicked() {
                    self.stop(id);
                    self.state.bots.retain(|b| b.id != id);
                    // The last one gone: back to the getting-started guide.
                    self.state.fix_primary();
                    self.dirty = true;
                    close = true;
                }
                if ui.add(secondary_button("取消")).clicked() {
                    close = true;
                }
            }); });
        });
        if close || dismissed {
            self.confirm_delete = None;
        }
    }

    fn handle_screenshot(&mut self, ctx: &egui::Context) {
        let Some(path) = self.screenshot.clone() else { return };
        self.frames += 1;
        let need = std::env::var("ANYBOT_SHOT_FRAMES").ok().and_then(|v| v.parse().ok()).unwrap_or(SCREENSHOT_FRAMES);
        // ANYBOT_SHOT_RESIZE=WxH: halfway through, resize the open window (the same path as the
        // person dragging its edge), so the picture shows the layout after a live resize.
        if self.frames == need / 2 {
            if let Some((w, h)) = std::env::var("ANYBOT_SHOT_RESIZE").ok().and_then(|v| {
                let (w, h) = v.split_once('x')?;
                Some((w.parse::<f32>().ok()?, h.parse::<f32>().ok()?))
            }) {
                ctx.send_viewport_cmd(egui::ViewportCommand::InnerSize(vec2(w, h)));
            }
        }
        // ANYBOT_SHOT_PAGE=id: open that page late (a screen gets its pages from the brain first).
        if self.frames == need * 3 / 4 {
            if let Some(id) = std::env::var("ANYBOT_SHOT_PAGE").ok().and_then(|v| v.parse().ok()) {
                self.page_view = Some((id, None));
            }
        }
        if self.frames >= need && !self.shot_requested {
            self.shot_requested = true;
            let slot = self.shot.clone();
            let repaint = ctx.clone();
            ctx.send_viewport_cmd(egui::ViewportCommand::Screenshot(egui::ScreenshotCallback::new(move |img| {
                *slot.lock().unwrap() = Some(img);
                repaint.request_repaint();
            })));
        }
        let shot = self.shot.lock().unwrap().take();
        if let Some(img) = shot {
            let [w, h] = img.size;
            let bytes: Vec<u8> = img.pixels.iter().flat_map(|c| c.to_array()).collect();
            if let Some(dir) = path.parent() {
                let _ = std::fs::create_dir_all(dir);
            }
            match image::RgbaImage::from_raw(w as u32, h as u32, bytes) {
                Some(buf) => {
                    if let Err(e) = buf.save(&path) {
                        eprintln!("could not save screenshot: {e}");
                    }
                }
                None => eprintln!("screenshot had an unexpected size"),
            }
            ctx.send_viewport_cmd(egui::ViewportCommand::Close);
        }
        ctx.request_repaint();
    }
}

impl App {
    /// Everything that keeps bots working, without drawing (the window runs it every frame;
    /// `anybot --serve` runs it on its own).
    fn background(&mut self, ctx: &egui::Context) {
        self.remote_start(ctx);
        self.mirror_tick();
        // A screen of another AnyBot's brain: its bots work there, not here.
        if self.mir.on {
            self.remote_tick(ctx);
            self.poll_fetches();
            return;
        }
        self.drain_events(ctx);
        if !self.demo {
            self.channels_poll(ctx);
        }
        self.remote_tick(ctx);
        self.tick_routines(ctx);
        self.watchdog();
        self.poll_fetches();
        self.poll_import();
    }

    fn save_if_dirty(&mut self) {
        if self.dirty && !self.demo && (self.streams.is_empty() || self.last_save.elapsed().as_secs() >= 2) {
            if self.mir.on {
                self.mirror_save();
            } else {
                self.state.save();
            }
            self.dirty = false;
            self.last_save = Instant::now();
        }
    }

    /// `anybot --serve` with ANYBOT_ACCOUNT=url|user and ANYBOT_ACCOUNT_PASSWORD: join the account
    /// (and, with ANYBOT_RESTORE_FROM_ACCOUNT=1, start once from the newest backup).
    fn serve_join(&mut self) {
        let (Ok(acct), Ok(pw)) = (std::env::var("ANYBOT_ACCOUNT"), std::env::var("ANYBOT_ACCOUNT_PASSWORD")) else { return };
        if !self.state.remote.host_token.is_empty() {
            return;
        }
        let Some((url, user)) = acct.rsplit_once('|') else { return };
        // ANYBOT_ACCOUNT_CREATE=1 (the server's own brain, first start): make the account if it isn't there.
        let mut r = crate::remote::relay_join(&self.state.remote, url, user, &pw, false, "");
        if r.is_err() && std::env::var("ANYBOT_ACCOUNT_CREATE").map(|v| v == "1").unwrap_or(false) {
            let invite = std::env::var("ANYBOT_RELAY_INVITE").unwrap_or_default();
            if let Ok(s) = crate::remote::relay_join(&self.state.remote, url, user, &pw, true, &invite) {
                eprintln!("AnyBot：已建立帳號 {user}");
                r = Ok(s);
            }
        }
        match r {
            Ok(s) => {
                self.state.remote = s;
                self.dirty = true;
                eprintln!("AnyBot：已加入帳號 {user}（{url}）");
            }
            Err(e) => {
                eprintln!("AnyBot：登入帳號失敗（30 秒後再試）：{e}");
                return;
            }
        }
        let marker = State::path().with_file_name("restored-from-account");
        if std::env::var("ANYBOT_RESTORE_FROM_ACCOUNT").map(|v| v == "1").unwrap_or(false) && !marker.exists() {
            match crate::remote::restore(url, user, &pw).and_then(|b| serde_json::from_slice::<State>(&b).map_err(|e| e.to_string())) {
                Ok(mut st) => {
                    st.remote = self.state.remote.clone();
                    eprintln!("AnyBot：已從帳號備份接手 {} 個 Bot", st.bots.len());
                    self.state = st;
                    self.dirty = true;
                    let _ = std::fs::write(&marker, chrono::Utc::now().to_rfc3339());
                }
                Err(e) => eprintln!("AnyBot：沒有接手備份：{e}"),
            }
        }
    }

    /// `anybot --serve`: no window. The bots, routines, triggers, channels and the phone page keep
    /// running (e.g. on an always-on Mac mini or a server); the person uses the phone.
    /// For testing a bot's tool use: `anybot --ask <message>` sends one message to the primary bot
    /// with no window, refuses every approval (and says so), and prints the turn's steps. Run it
    /// with ANYBOT_DATA_DIR pointing at a copy of the data folder. It doesn't connect to the
    /// account, channels or routines.
    pub fn ask_cli(ctx: &egui::Context, text: &str) -> ! {
        let mut app = App::new(ctx, None);
        app.headless = true;
        let id = app.state.primary_bot;
        let start = app.state.bot(id).map(|b| b.messages.len()).unwrap_or(0);
        app.drafts.insert(id, text.to_string());
        app.send(ctx, id);
        let t0 = Instant::now();
        let limit = std::env::var("ANYBOT_ASK_SECS").ok().and_then(|v| v.parse().ok()).unwrap_or(900u64);
        while app.streams.contains_key(&id) && t0.elapsed().as_secs() < limit {
            if let Some(a) = app.approvals.remove(&id) {
                println!("  ⚠️ 要求核准（自動拒絕）：{} — {}", a.tool, a.reason);
                let _ = a.reply.send(ApprovalAnswer::Reject);
            }
            app.drain_events(ctx);
            app.watchdog();
            ctx.run_ui(Default::default(), |_| {}).textures_delta.clear();
            std::thread::sleep(std::time::Duration::from_millis(100));
        }
        let secs = t0.elapsed().as_secs();
        let msgs = app.state.bot(id).map(|b| b.messages[start..].to_vec()).unwrap_or_default();
        let clip = |s: &str, n: usize| -> String {
            let one = s.replace('\n', " ⏎ ");
            if one.chars().count() > n { format!("{}…", one.chars().take(n).collect::<String>()) } else { one }
        };
        let full = std::env::var("ANYBOT_ASK_FULL").is_ok();
        let mut steps = 0;
        for m in &msgs {
            match m.role {
                Role::User => println!("👤 {}", m.text),
                Role::Assistant => {
                    if !m.text.trim().is_empty() {
                        println!("🤖 {}", if full || m.tool_calls.is_empty() { m.text.clone() } else { clip(&m.text, 300) });
                    }
                    for c in &m.tool_calls {
                        steps += 1;
                        println!("  🔧 {} {}", c.name, clip(&c.args, 200));
                    }
                }
                Role::Tool => println!("     ↳ {}{}", if m.images.is_empty() { "" } else { "[附截圖] " }, clip(&m.text, if full { 4000 } else { 400 })),
            }
        }
        println!("—— {steps} 個工具步驟，{secs} 秒");
        app.state.save();
        std::process::exit(0)
    }

    pub fn serve(ctx: &egui::Context) -> ! {
        let mut app = App::new(ctx, None);
        app.headless = true;
        if let Ok(pw) = std::env::var("ANYBOT_PHONE_PASSWORD") {
            if pw.chars().count() >= 8 && !crate::httpd::check_password(&pw, &app.state.remote.password) {
                app.state.remote.password = crate::httpd::hash_password(&pw);
                app.state.remote.devices.clear();
            }
            app.state.remote.lan = true;
            app.dirty = true;
        }
        if let Ok(name) = std::env::var("ANYBOT_HOST_NAME") {
            if !name.trim().is_empty() && app.state.remote.host_name != name {
                app.state.remote.host_name = name;
                app.dirty = true;
            }
        }
        // 手腳: a computer the brain's bots may operate (screen, files, browser).
        if std::env::var("ANYBOT_DEVICE_LINK").map(|v| v == "1").unwrap_or(false) && !app.state.remote.device_link {
            app.state.remote.device_link = true;
            app.dirty = true;
        }
        app.serve_join();
        app.background(ctx);
        if let Some(port) = crate::remote::lan_port() {
            for a in crate::remote::addresses(port) {
                eprintln!("AnyBot：手機可以打開 {a}");
            }
        }
        if !app.state.remote.relay_url.is_empty() {
            eprintln!("AnyBot：透過帳號 {} 連線（{}）", app.state.remote.relay_user, app.state.remote.relay_url);
        }
        if app.state.remote.password.is_empty() && app.state.remote.host_token.is_empty() && std::env::var("ANYBOT_ACCOUNT").is_err() {
            eprintln!("AnyBot：還沒有設定手機密碼或帳號。用 ANYBOT_PHONE_PASSWORD=… 或 ANYBOT_ACCOUNT=網址|帳號 + ANYBOT_ACCOUNT_PASSWORD=… 啟動。");
        }
        let mut last_try = Instant::now();
        let mut last_brain = Instant::now() - std::time::Duration::from_secs(60);
        loop {
            // The account server may not be up yet (or the account not made yet): keep trying.
            if app.state.remote.host_token.is_empty() && last_try.elapsed().as_secs() >= 30 {
                last_try = Instant::now();
                app.serve_join();
            }
            // ANYBOT_BRAIN=名稱: show that AnyBot's bots instead of running its own.
            if let Ok(want) = std::env::var("ANYBOT_BRAIN") {
                if !want.trim().is_empty() && !app.state.remote.host_token.is_empty() && app.state.remote.brain_name != want && last_brain.elapsed().as_secs() >= 20 {
                    last_brain = Instant::now();
                    if let Some((id, name, _)) = crate::remote::devices_online(&app.state.remote).into_iter().find(|(_, n, _)| n == want.trim()) {
                        eprintln!("AnyBot：用「{name}」當大腦，這台當手腳");
                        app.mir.want = Some((id, name));
                        app.state.remote.device_link = true;
                    }
                }
            }
            app.background(ctx);
            app.save_if_dirty();
            // egui wants a frame now and then to forget old state; nothing is drawn.
            ctx.run_ui(Default::default(), |_| {}).textures_delta.clear();
            std::thread::sleep(std::time::Duration::from_millis(if app.streams.is_empty() { 250 } else { 60 }));
        }
    }
}

impl eframe::App for App {
    /// Screenshot mode only: ANYBOT_SHOT_CLICK="x,y@frame[;x,y@frame…][:right]" clicks there at that
    /// frame (to check buttons really respond).
    fn raw_input_hook(&mut self, _ctx: &egui::Context, raw: &mut egui::RawInput) {
        if self.screenshot.is_none() {
            return;
        }
        // ANYBOT_SHOT_DRAG="x1,y1>x2,y2@frame": press, move over 12 frames, release.
        if let Ok(d) = std::env::var("ANYBOT_SHOT_DRAG") {
            if let Some((path, at)) = d.split_once('@') {
                let at: u32 = at.trim().parse().unwrap_or(30);
                let pts: Vec<f32> = path.split(['>', ',']).filter_map(|v| v.trim().parse().ok()).collect();
                if pts.len() == 4 {
                    let (a, b) = (egui::pos2(pts[0], pts[1]), egui::pos2(pts[2], pts[3]));
                    let f = self.frames + 1;
                    if f == at {
                        raw.events.push(egui::Event::PointerMoved(a));
                    } else if f == at + 1 {
                        raw.events.push(egui::Event::PointerButton { pos: a, button: egui::PointerButton::Primary, pressed: true, modifiers: Default::default() });
                    } else if f > at + 1 && f <= at + 13 {
                        let k = (f - at - 1) as f32 / 12.0;
                        raw.events.push(egui::Event::PointerMoved(a + (b - a) * k));
                    } else if f == at + 15 {
                        raw.events.push(egui::Event::PointerButton { pos: b, button: egui::PointerButton::Primary, pressed: false, modifiers: Default::default() });
                    }
                }
            }
        }
        // ANYBOT_SHOT_HOVER="x,y@frame": just move the pointer there (tooltips).
        if let Ok(h) = std::env::var("ANYBOT_SHOT_HOVER") {
            if let Some((xy, at)) = h.split_once('@') {
                if let (Some((x, y)), Ok(at)) = (xy.split_once(','), at.trim().parse::<u32>()) {
                    if self.frames + 1 == at {
                        if let (Ok(x), Ok(y)) = (x.trim().parse::<f32>(), y.trim().parse::<f32>()) {
                            raw.events.push(egui::Event::PointerMoved(egui::pos2(x, y)));
                        }
                    }
                }
            }
        }
        let Ok(spec) = std::env::var("ANYBOT_SHOT_CLICK") else { return };
        for one in spec.split(';') {
            let (pos, right) = match one.strip_suffix(":right") { Some(p) => (p, true), None => (one, false) };
            let Some((xy, at)) = pos.split_once('@') else { continue };
            let Some((x, y)) = xy.split_once(',') else { continue };
            let (Ok(x), Ok(y), Ok(at)) = (x.trim().parse::<f32>(), y.trim().parse::<f32>(), at.trim().parse::<u32>()) else { continue };
            let p = egui::pos2(x, y);
            let button = if right { egui::PointerButton::Secondary } else { egui::PointerButton::Primary };
            if self.frames + 1 == at {
                raw.events.push(egui::Event::PointerMoved(p));
            }
            if self.frames + 1 == at + 1 {
                raw.events.push(egui::Event::PointerButton { pos: p, button, pressed: true, modifiers: Default::default() });
            }
            if self.frames + 1 == at + 2 {
                raw.events.push(egui::Event::PointerButton { pos: p, button, pressed: false, modifiers: Default::default() });
            }
        }
    }

    fn ui(&mut self, ui: &mut egui::Ui, _frame: &mut eframe::Frame) {
        let ctx = &ui.ctx().clone();
        self.handle_screenshot(ctx);
        self.state.fix_primary();
        self.md_viewer(ctx);
        self.page_viewer(ctx);
        self.refresh_presence(ctx);
        self.check_for_newer_build();
        if std::mem::take(&mut self.relaunch_requested) {
            self.relaunch(ctx);
        }
        self.background(ctx);
        self.call_poll(ctx);
        if self.state.theme == Theme::System {
            self.apply_theme(ctx);
        }
        if ctx.input(|i| i.modifiers.command && i.key_pressed(Key::N)) {
            self.new_bot();
        }
        if ctx.input(|i| i.modifiers.command && i.key_pressed(Key::Comma)) {
            self.show_settings = true;
        }
        self.sidebar(ui);
        self.main_pane(ui);
        self.bot_editor(ctx);
        self.settings(ctx);
        self.delete_dialog(ctx);
        self.routines_window(ctx);
        self.rebuild_dialog(ctx);
        self.viewer_window(ctx);
        self.local_control_bar(ctx);
        self.teach_bar(ctx);
        self.approval_popup(ctx);
        self.file_viewer(ctx);
        self.splash(ctx);
        self.drop_overlay(ctx);
        // Keep the routine clock ticking while the window sits idle.
        if !self.demo {
            ctx.request_repaint_after(std::time::Duration::from_secs(15));
        }
        if !self.streams.is_empty() || !self.model_fetch.is_empty() {
            ctx.request_repaint_after(std::time::Duration::from_millis(100));
        }
        self.save_if_dirty();
    }

    fn on_exit(&mut self) {
        // Closing mid-reply ends that turn as cancelled, so it isn't left looking stuck.
        // (On a screen of a brain the bots keep working there.)
        if self.mir.on {
            self.streams.clear();
        }
        let ids: Vec<u64> = self.streams.keys().copied().collect();
        for id in ids {
            self.stop(id);
        }
        tools::stop_all();
        crate::cloudbox::shutdown();
        if !self.demo {
            if self.mir.on {
                self.mirror_save();
            } else {
                self.state.save();
            }
        }
    }
}

// ---------- helpers ----------

/// When the program file was last written (= when this build was made).
fn exe_modified() -> Option<std::time::SystemTime> {
    std::env::current_exe().ok().and_then(|p| std::fs::metadata(p).ok()).and_then(|m| m.modified().ok())
}

/// "2026-11-03 20:57" in local time, or "?" when unknown.
fn version_label(t: Option<std::time::SystemTime>) -> String {
    t.map(|t| chrono::DateTime::<chrono::Local>::from(t).format("%Y-%m-%d %H:%M").to_string()).unwrap_or_else(|| "?".into())
}

/// How often the relaunch helper checks whether the old copy has exited (main-app.cjs @3195964,
/// `PBt`: `while kill -0 "$pid" …; do sleep 0.2; done; exec "$app"`).
pub const RELAUNCH_POLL_SECS: f32 = 0.2;

/// A detached helper that waits for this copy (`pid`) to exit, then starts `exe`, so two copies
/// never run at once and the old one's last save lands first. Like the original's `Pur`
/// (`spawn(shell, …, {detached:true, stdio:"ignore"})`), its input and output go nowhere;
/// the main program also reopens closed std streams on /dev/null at start (`sub_1000004c0`,
/// 0x1000004c0). Start-up switches are cleared so the new copy opens normally (the original's
/// `entry`, 0x100000460, changes how it starts when ELECTRON_RUN_AS_NODE is set).
pub fn relaunch_command(pid: u32, exe: &std::path::Path) -> std::process::Command {
    let script = format!("while kill -0 \"$1\" 2>/dev/null; do sleep {RELAUNCH_POLL_SECS}; done; exec \"$2\"");
    let mut c = std::process::Command::new("/bin/sh");
    c.arg("-c").arg(script).arg("anybot-relaunch").arg(pid.to_string()).arg(exe);
    c.stdin(std::process::Stdio::null()).stdout(std::process::Stdio::null()).stderr(std::process::Stdio::null());
    for k in ["ANYBOT_SHOT_VIEW", tools::ENV_CONVERSATION_ID, tools::ENV_REQUEST_ID, "ELECTRON_RUN_AS_NODE"] {
        c.env_remove(k);
    }
    #[cfg(unix)]
    {
        use std::os::unix::process::CommandExt;
        c.process_group(0);
    }
    c
}

/// A reply that is still coming in.
struct Live {
    cancel: Arc<AtomicBool>,
    started: Instant,
    last: Instant,
    produced: bool,
    status: Option<String>,
    /// Waiting for an approval or a running tool: the stall watchdog stays quiet.
    paused: bool,
    /// What the person typed during this turn, waiting for the next step.
    steer: Arc<Mutex<Vec<String>>>,
    turn_id: String,
    /// 直接操作 for this turn (switched on mid-turn by "全部允許").
    direct: Arc<AtomicBool>,
}

/// How an "always allow" grant reads in the UI.
fn grant_label(g: &str) -> String {
    match g {
        "edit_file" => "「修改檔案」".into(),
        "browser:read" => "「讀取瀏覽器分頁」".into(),
        "read:anywhere" => "「讀取工作資料夾以外」".into(),
        "computer:see" => "「看你的螢幕」".into(),
        g if g.starts_with("app:") => format!("操作「{}」", &g[4..]),
        g if g.starts_with("mcp:") => format!("使用連接器「{}」", &g[4..]),
        g if g.starts_with("login:") => format!("登入 {}", &g[6..]),
        g if g.starts_with("macapp-write:") => format!("修改「{}」", &g[13..]),
        g if g.starts_with("macapp:") => format!("讀取「{}」", &g[7..]),
        other => format!("「{}」", other.trim_start_matches("shell:")),
    }
}

/// Padding that makes a one-line bubble 36 px tall around 15 px text (egui row ≈ 18 px).
fn bubble_margin() -> Margin {
    // index CSS `message`: padding-block var(--sand-transcript-prose-block-padding) = 7px,
    // padding-inline 12px (7 + 22 + 7 = the 36 px one-line bubble).
    debug_assert_eq!(7.0 * 2.0 + TRANSCRIPT_LINE_HEIGHT, BUBBLE_ONE_LINE_HEIGHT);
    Margin::symmetric(12, 7)
}

/// index.eager-app `messageColumnOfBlock`: max-width min(80cqi, 560px, 100cqi - 82px).
pub const MESSAGE_MAX_WIDTH: f32 = 560.0;
pub fn message_max_width(container: f32) -> f32 {
    (container * 0.8).min(MESSAGE_MAX_WIDTH).min(container - 82.0).max(120.0)
}

/// What the model sees: attachments read in, 引用 and 表情回應 noted, and in a group chat the other
/// members' answers as labelled words (their tool steps and private blocks left out).
fn group_history(messages: &[Message], speaker: Option<u64>, st: &State) -> Vec<Message> {
    let mut out = vec![];
    let mut skip_tool_ids: std::collections::HashSet<String> = Default::default();
    for m in messages {
        let mut m = m.clone();
        if !m.attachments.is_empty() {
            let (extra, images) = crate::attach::for_model(&m.attachments);
            m.text = format!("{}{extra}", m.text);
            m.images = images;
        }
        if m.role == Role::Assistant && !m.reactions.is_empty() {
            m.text = format!("{}\n（使用者對這則回應：{}）", m.text, m.reactions.join(" "));
        }
        if let Some(me) = speaker {
            if m.role == Role::Assistant && m.author != me && !m.summary {
                for c in &m.tool_calls {
                    skip_tool_ids.insert(c.id.clone());
                }
                if m.text.trim().is_empty() {
                    continue;
                }
                let who = st.bot(m.author).map(|b| b.name.clone()).unwrap_or_else(|| "其他成員".into());
                out.push(Message::user(&format!("【{who}】{}", m.text)));
                continue;
            }
            if m.role == Role::Tool && skip_tool_ids.contains(&m.tool_call_id) {
                continue;
            }
        }
        out.push(m);
    }
    out
}

/// 生活卡片: a flight, place, weather, product or event the bot found, drawn as a card.
fn card(ui: &mut egui::Ui, args: &str, p: Palette) {
    let v = tools::args_of(args);
    use crate::icons::Icon;
    let icon = match v["kind"].as_str().unwrap_or("") {
        "flight" => Icon::Plane,
        "place" => Icon::MapPin,
        "weather" => Icon::CloudSun,
        "product" => Icon::ShoppingBag,
        "event" => Icon::Calendar,
        _ => Icon::Folder,
    };
    ui.add_space(4.0);
    Frame::new()
        .fill(p.elevated)
        .stroke(Stroke::new(1.0, p.border))
        .corner_radius(14)
        .inner_margin(Margin::symmetric(14, 12))
        .shadow(egui::epaint::Shadow { offset: [0, 2], blur: 8, spread: 0, color: Color32::from_black_alpha(14) })
        .show(ui, |ui| {
            ui.set_max_width(message_max_width(ui.available_width() + 32.0));
            ui.horizontal(|ui| {
                let (r, _) = ui.allocate_exact_size(vec2(26.0, 26.0), egui::Sense::hover());
                crate::icons::paint(ui.painter(), r, icon, p.text2);
                ui.vertical(|ui| {
                    ui.spacing_mut().item_spacing.y = 1.0;
                    ui.label(RichText::new(v["title"].as_str().unwrap_or("")).strong().size(FONT_LG));
                    if let Some(st) = v["subtitle"].as_str().filter(|x| !x.is_empty()) {
                        ui.label(RichText::new(st).size(FONT_XS).color(p.text3));
                    }
                });
            });
            let rows = v["rows"].as_array().cloned().unwrap_or_default();
            if !rows.is_empty() {
                ui.add_space(6.0);
                egui::Grid::new(("card", args.len(), v["title"].as_str().unwrap_or(""))).num_columns(2).spacing([14.0, 4.0]).show(ui, |ui| {
                    for r in rows.iter().take(12) {
                        ui.label(RichText::new(r["label"].as_str().unwrap_or("")).size(FONT_SM).color(p.text3));
                        ui.add(egui::Label::new(RichText::new(r["value"].as_str().unwrap_or("")).size(FONT_SM)).wrap());
                        ui.end_row();
                    }
                });
            }
            if let Some(link) = v["link"].as_str().filter(|l| l.starts_with("http")) {
                ui.add_space(4.0);
                ui.hyperlink_to(RichText::new(t("查看來源 ↗")).size(FONT_XS).color(p.accent), link);
            }
        });
    ui.add_space(4.0);
}

/// 匯出文字記錄: the chat as Markdown (tool steps folded in as quotes).
fn transcript_markdown(b: &Bot) -> String {
    let mut s = format!("# {} 的對話\n\n匯出時間：{}\n\n", b.name, chrono::Local::now().format("%Y-%m-%d %H:%M"));
    for m in &b.messages {
        match m.role {
            Role::User => {
                s.push_str(&format!("**你**：{}\n", m.text));
                for a in &m.attachments {
                    s.push_str(&format!("　［附件］ {}\n", a.name));
                }
                s.push('\n');
            }
            Role::Assistant if m.summary => s.push_str(&format!("> （較早的對話摘要）{}\n\n", m.text.replace('\n', " "))),
            Role::Assistant => {
                if !m.text.trim().is_empty() {
                    s.push_str(&format!("**{}**：{}\n\n", b.name, m.text));
                }
                for c in &m.tool_calls {
                    s.push_str(&format!("> ［工具］{} {}\n", c.name, c.args.chars().take(200).collect::<String>()));
                }
                if !m.tool_calls.is_empty() {
                    s.push('\n');
                }
            }
            Role::Tool => {}
        }
    }
    s
}

/// What the bot is told about itself, the app it lives in and the computers it can use.
fn system_prompt(b: &Bot, st: &State, computers: &[tools::Target], default_computer: &str) -> String {
    let mut s = format!("你是「{}」。", b.name);
    if !b.description.trim().is_empty() {
        s.push_str(&format!("你的角色：{}。", b.description.trim()));
    }
    if b.id == st.primary_bot {
        s.push_str("你是使用者的主要 Bot：主要聯絡窗口，可以主動幫忙，也能用 message_bot 把工作交給其他 Bot。");
    }
    let now = crate::routines::now_in(&st.timezone);
    s.push_str(&format!(
        "\n\n現在是 {}（{}，時區 {}）。\n\
         你在 AnyBot 這個 App 裡，可以直接操作 App：\n\
         - 使用者想定期或在某個時間做事（每天、每週一、每月一號、提醒我…），就用 create_routine 設成例行任務；時間照使用者的時區。查看、修改、暫停、刪除用 list_routines / update_routine / delete_routine。\n\
         - 換模型或供應商、改名字、建立新 Bot：update_bot / create_bot；看有哪些 Bot：list_bots。\n\
         - 主題、強調色、時區：update_settings。\n\
         - 使用者說「交給某某 Bot」或需要別的 Bot 專長時，用 message_bot。\n\
         做完 App 操作後，用一句話告訴使用者結果（例如排程的時間）。\n\n\
         你也可以上網和用使用者的瀏覽器：\n\
         - 公開網頁：web_fetch。\n\
         - 要登入才看得到的（Threads、Instagram、Facebook、Gmail、銀行…）：用 browser_open 在 AnyBot 自己的瀏覽器視窗打開，再用 browser_read 讀分頁內容。例如看 Threads 帳號：browser_open(\"https://www.threads.net\") 然後 browser_read。\n\
         - 在網頁上做事（後台、報表、表單）要像人一樣操作：先 browser_screenshot 看一眼（圖上每個可點的東西都有編號），再用 browser_click／browser_type／browser_select／browser_press 照編號操作；表格用 browser_table 讀，找字用 browser_find，要等載入用 browser_wait，匯出報表用 browser_download。不要猜網址；找不到想要的功能（例如排序、篩選），就看欄位標題、篩選器、下拉選單或分頁標籤，還是沒有就照頁面現有的資料自己整理，並說明網站沒有這個功能。
         - 絕對不要直接呼叫網站的內部 API、下載網站的程式碼來研究，或用程式大量抓資料：網站會把帳號當成機器人（例如跳出拼圖驗證、封鎖帳號）。出現驗證碼、拼圖或簡訊驗證時，停下來請使用者在 AnyBot 瀏覽器視窗完成。
         - 如果讀到的是登入頁，請使用者在跳出來的 AnyBot 瀏覽器視窗登入一次（之後會記住），登入好再讀。絕對不要叫使用者去改瀏覽器的設定或選單（例如「允許來自 Apple 事件的 JavaScript」），那不需要。也不要說要從 Chrome 複製登入或 Cookie，沒有這個功能。\n\
         - AnyBot 瀏覽器有設定檔（profile），每個有自己的登入。使用者說要換 profile／設定檔／另一個帳號時，用 browser_profiles：list 看有哪些，use 切換，add 新增（新的要登入一次）。也可以在 browser_open / browser_read 帶 profile 參數。使用者想用自己平常的 Chrome（自己的 Chrome 設定檔、已經登入的帳號）時，用 profile「你的瀏覽器」：請使用者在 Chrome 切到想要的設定檔，再 browser_read。\n\
         - 你也能像人一樣操作螢幕：你自己的電腦（Bot 的電腦，Linux 桌面）或使用者的 Mac（你的電腦，用在使用者自己的 App）。computer_use_screenshot 看畫面，再用 computer_use_click / computer_use_typing / computer_use_press_key / computer_use_scroll / computer_use_drag 操作；座標用最新截圖上的像素。每做一步就再截圖確認。用在檔案和網頁工具做不到的事（例如操作其他 App、在 Chrome 切換設定檔）。\n\
         - 使用者 Mac 上的「提醒事項、行事曆、聯絡人、備忘錄、郵件、訊息」有專門的工具（ios_read_reminders、mobile_read_calendar、mobile_read_contacts、mac_read_notes、mac_read_mail 等），比操作畫面快又準；寄信或傳訊息每次都會先請使用者確認，起草郵件（mac_draft_mail）則讓使用者自己按寄出。\n\
         - 不要說「我沒有瀏覽器或工具」：先試這些工具。需要權限時 App 會自己跳出視窗問使用者；工具回報要開什麼設定時，照實轉告。",
        now.format("%Y-%m-%d %H:%M"),
        ["週一", "週二", "週三", "週四", "週五", "週六", "週日"][now.weekday().num_days_from_monday() as usize],
        st.timezone
    ));
    if !b.routines.is_empty() {
        s.push_str("\n\n你目前的例行任務：\n");
        s.push_str(&b.routines.iter().map(appctl::routine_line).collect::<Vec<_>>().join("\n"));
    }
    // 頁面: what this bot already keeps, so a routine or a follow-up updates the same page.
    let mine: Vec<String> = st.pages.iter().filter(|p| p.bot == b.id).map(|p| format!("#{} 「{}」（第 {} 版，更新於 {}）", p.id, p.title, p.revision, crate::pages::when(p.updated))).collect();
    if !mine.is_empty() {
        s.push_str("\n\n你做過的頁面（更新時用 write_page 帶 id，先 read_page 看現在的內容）：\n");
        s.push_str(&mine.join("\n"));
    }
    if !computers.is_empty() {
        let list: Vec<String> = computers
            .iter()
            .map(|t| match &t.place {
                tools::Place::Sealed { root } => format!("- {}：你自己的電腦（獨立資料夾 {}，看不到使用者的檔案；沒有螢幕）", t.name, root.display()),
                tools::Place::Box { dir } => {
                    let secrets = crate::cloudbox::secret_names();
                    format!(
                        "- {}：你自己的 Linux 電腦（Debian，有桌面和 Chromium，所有 Bot 共用；你的資料夾是 {dir}，可以 sudo 安裝套件）。需要時會自動喚醒。可以用 computer_use_* 工具（computer=「{}」）看它的螢幕和操作滑鼠鍵盤，例如開 chromium 上網、測網頁。{}",
                        t.name,
                        t.name,
                        if secrets.is_empty() { String::new() } else { format!("使用者設好的環境密鑰（已是環境變數，值不要印出來）：{}。", secrets.join("、")) }
                    )
                }
                tools::Place::Local { workdir } => format!(
                    "- {}：{}，起始資料夾 {}{}",
                    t.name,
                    if cfg!(target_os = "macos") { "使用者的這台 Mac" } else if crate::platform::has_desktop() { "使用者的這台 Linux 電腦（快捷鍵用 Ctrl，不是 ⌘）" } else { "AnyBot 所在的伺服器（不是使用者的 Mac；要用使用者的 Mac 請選帳號裡那台電腦的名字）" },
                    workdir.display(),
                    if st.local_execution { "" } else { "（還沒預先允許：直接使用工具即可，App 會跳出視窗問使用者）" }
                ),
                tools::Place::Ssh { target, .. } => format!("- {}：使用者的另一台電腦（SSH {target}）", t.name),
                tools::Place::Device { .. } => format!("- {}：使用者帳號裡的另一台電腦（裝置連結；可以用檔案、指令和 computer_use_* 工具，computer=「{}」）", t.name, t.name),
            })
            .collect();
        s.push_str(&format!(
            "\n\n你可以用工具在電腦上做事。每個工具都有 computer 參數，預設是「{default_computer}」。\n{}\n\
             - 使用者說在哪台電腦上做（「在我的 Mac 上」「在工作站上」），就把 computer 設成那台；沒說就用預設。\n\
             - 先用 list_dir、search、read_file 看清楚，再動手。\n\
             - 需要權限時（電腦工具還沒打開、要用使用者的電腦、會改變東西的操作），直接呼叫工具，App 會自己跳出視窗請使用者允許；不要叫使用者自己去改設定。被拒絕就換個方式或問使用者。\n\
             - 跑很久的指令會移到背景，用 read_terminal 追蹤，不要重複執行；它在等輸入時（例如問 y/n），用 write_terminal 回答。\n\
             - 只有工具結果證明做完了，才說做完；失敗就照實說。\n\
             - 回覆使用者時，用簡單的話說明你做了什麼、在哪台電腦、結果如何。",
            list.join("\n")
        ));
    }
    let chans: Vec<String> = st.channels.iter().filter(|c| c.bot_id == b.id && c.enabled).map(|c| format!("{}「{}」", c.kind.label(), c.name)).collect();
    if !chans.is_empty() {
        s.push_str(&format!("\n\n你也在這些訊息管道回覆別人：{}。以「［訊息管道］」開頭的訊息來自那裡，你這一回合最後的回答會自動傳回給對方，所以要簡潔、直接回答對方，不要用表格，也不要提到 AnyBot 的內部操作。對方不是使用者本人：不要透露使用者的私人資料，要動到使用者的電腦或帳號前先確認。", chans.join("、")));
    }
    s.push_str(&crate::memory::prompt_section(&b.memories, &st.skills));
    let mcp_notes = crate::mcp::instructions(&st.mcp_servers);
    let mcp_tools = crate::mcp::status();
    if !mcp_tools.is_empty() {
        s.push_str(&format!("\n\n你也可以用使用者接上的連接器（MCP，工具名稱以 mcp__ 開頭）：{}。第一次用某個連接器時 App 會問使用者。{}", mcp_tools.keys().cloned().collect::<Vec<_>>().join("、"), if mcp_notes.is_empty() { String::new() } else { format!("\n連接器的使用說明：\n{mcp_notes}") }));
    }
    s.push_str(&crate::teach::prompt_section(&b.demos));
    if !b.instructions.trim().is_empty() {
        s.push_str("\n\n");
        s.push_str(b.instructions.trim());
    }
    s.push_str("\n\n使用者要你追蹤、整理、比較、研究一件之後還會回來看的事（例如「幫我追蹤台灣 FSD 狀況」），就用 write_page 做成一頁：先寫結論和現況，再寫細節和來源（附日期），適合時用表格、```stats、```steps、圖表。回答時簡短說重點，並用 [頁面標題](page:ID) 連到它。要定期追蹤時，再用 create_routine 設例行任務，每次執行：read_page、查新消息，有實質進展才用 write_page 更新（note 寫改了什麼）並在聊天裡說；沒有新消息就簡短回答「沒有新消息」，不要更新頁面。");
    s.push_str("\n\n做好的檔案（試算表、文件、Markdown、網頁、圖片）用 send_file 傳進聊天，使用者點一下就能預覽；不要只說檔案放在哪裡。適合的時候可以用 react 對使用者的訊息按個表情（例如謝謝你時按 ❤️），不用每次都按。");
    s.push_str("\n\n");
    s.push_str(&crate::i18n::reply_instruction(&st.language));
    s
}

fn short_provider(k: ProviderKind) -> &'static str {
    match k {
        ProviderKind::Xai => "Grok",
        ProviderKind::OpenAi => "OpenAI",
        ProviderKind::Anthropic => "Claude",
        ProviderKind::Gemini => "Gemini",
        ProviderKind::OpenRouter => "OpenRouter",
        ProviderKind::OpenCodeGo => "OpenCode Go",
        ProviderKind::Ollama => "Ollama",
        ProviderKind::Custom => "自訂",
    }
}

/// The Chinese font's "·" already carries space on both sides; spaces around it doubled the gap.
fn tidy_dots(s: &str) -> String {
    s.replace(" · ", "·")
}

fn first_line(s: &str, max: usize) -> String {
    let line = s.lines().map(str::trim).find(|l| !l.is_empty()).unwrap_or("");
    let line = line.trim_start_matches(['#', '-', '*', ' ']);
    let mut out: String = line.chars().take(max).collect();
    if line.chars().count() > max {
        out.push('…');
    }
    out
}

fn icon_button(ui: &mut egui::Ui, icon: &str, tip: &str, p: Palette) -> egui::Response {
    if let Some(ic) = crate::icons::Icon::from_name(icon) {
        return crate::icons::button(ui, ic, 28.0, p.text2, p.hover).on_hover_text(t(tip));
    }
    ui.add(egui::Button::new(RichText::new(icon).size(15.0).color(p.text2)).frame(false).min_size(vec2(26.0, 26.0))).on_hover_text(t(tip))
}

/// A header action: text only, a soft fill on hover.
#[allow(dead_code)]
fn quiet_button(ui: &mut egui::Ui, text: &str, p: Palette) -> egui::Response {
    ui.add(egui::Button::new(RichText::new(t(text)).size(FONT_SM).color(p.text2)).frame_when_inactive(false).corner_radius(8).min_size(vec2(0.0, 28.0)))
}

fn small_button(ui: &mut egui::Ui, text: &str, p: Palette) -> egui::Response {
    ui.add(egui::Button::new(RichText::new(t(text)).size(11.5).color(p.text3)).frame_when_inactive(false).corner_radius(6).min_size(vec2(0.0, 22.0)))
}

/// The input's 28 px round buttons (＋, mic, voice chat / send).
fn round_tool(ui: &mut egui::Ui, icon: crate::icons::Icon, fill: Color32, ink: Color32) -> egui::Response {
    let (rect, r) = ui.allocate_exact_size(vec2(28.0, 28.0), egui::Sense::click());
    let f = if r.hovered() { fill.gamma_multiply(0.82).to_opaque().lerp_to_gamma(fill, 0.3) } else { fill };
    ui.painter().circle_filled(rect.center(), 14.0, f);
    crate::icons::paint(ui.painter(), egui::Rect::from_center_size(rect.center(), vec2(15.0, 15.0)), icon, ink);
    r.on_hover_cursor(egui::CursorIcon::PointingHand)
}

/// A 36 px rounded button with a hairline border (the original's 分享 / ⋯).
fn pill_text(ui: &mut egui::Ui, text: &str, p: Palette) -> egui::Response {
    ui.add(egui::Button::new(RichText::new(text).size(14.0).color(p.text)).fill(p.elevated).stroke(Stroke::new(1.0, p.border)).corner_radius(18).min_size(vec2(0.0, 36.0)))
}

fn pill_icon(ui: &mut egui::Ui, icon: crate::icons::Icon, p: Palette) -> egui::Response {
    let (rect, r) = ui.allocate_exact_size(vec2(36.0, 36.0), egui::Sense::click());
    ui.painter().circle_filled(rect.center(), 18.0, if r.hovered() { p.hover } else { p.elevated });
    ui.painter().circle_stroke(rect.center(), 17.5, Stroke::new(1.0, p.border));
    crate::icons::paint(ui.painter(), egui::Rect::from_center_size(rect.center(), vec2(16.0, 16.0)), icon, p.text2);
    r.on_hover_cursor(egui::CursorIcon::PointingHand)
}

/// A group heading inside a settings page (like the original's section titles).
fn section(ui: &mut egui::Ui, title: &str, p: Palette) {
    ui.add_space(14.0);
    ui.label(RichText::new(t(title)).size(FONT_SM).strong().color(p.text3));
    ui.add_space(2.0);
}

/// A small「?」after a setting's name. Its explanation shows as soon as the pointer is on it (no
/// waiting for the pointer to be still), and a click keeps it open until the next click.
fn help_mark(ui: &mut egui::Ui, text: &str, p: Palette) {
    if text.trim().is_empty() {
        return;
    }
    let (rect, r) = ui.allocate_exact_size(vec2(18.0, 18.0), egui::Sense::click());
    let pinned_id = r.id.with("pinned");
    let mut pinned = ui.ctx().data(|d| d.get_temp::<bool>(pinned_id)).unwrap_or(false);
    if r.clicked() {
        pinned = !pinned;
    } else if pinned && ui.input(|i| i.pointer.any_pressed()) && !r.hovered() {
        pinned = false;
    }
    ui.ctx().data_mut(|d| d.insert_temp(pinned_id, pinned));
    let show = r.hovered() || pinned;
    let col = if show { p.text } else { p.text3 };
    ui.painter().circle_stroke(rect.center(), 6.5, Stroke::new(1.1, col));
    ui.painter().text(rect.center() + vec2(0.0, 0.5), egui::Align2::CENTER_CENTER, "?", egui::FontId::proportional(10.0), col);
    if show {
        let text = t(text);
        egui::Area::new(r.id.with("help"))
            .order(egui::Order::Tooltip)
            .fixed_pos(rect.left_bottom() + vec2(-4.0, 6.0))
            .constrain(true)
            .interactable(false)
            .show(ui.ctx(), |ui| {
                Frame::popup(ui.style()).corner_radius(10).inner_margin(Margin::symmetric(12, 10)).show(ui, |ui| {
                    ui.set_max_width(300.0);
                    ui.add(egui::Label::new(RichText::new(text).size(FONT_SM).color(p.text)).wrap());
                });
            });
    }
    r.on_hover_cursor(egui::CursorIcon::Help);
}

/// One setting: its name (with「?」for the explanation) on the left, its control on the right.
fn setting_row(ui: &mut egui::Ui, p: Palette, label: &str, desc: &str, control: impl FnOnce(&mut egui::Ui)) {
    Frame::new().fill(p.elevated).corner_radius(10).inner_margin(Margin::symmetric(14, 10)).show(ui, |ui| {
        ui.set_width(ui.available_width());
        ui.horizontal(|ui| {
            let w = (ui.available_width() * 0.5).max(180.0);
            ui.horizontal(|ui| {
                ui.set_width(w);
                ui.spacing_mut().item_spacing.x = 4.0;
                ui.label(RichText::new(t(label)).size(FONT_BASE).color(p.text));
                help_mark(ui, desc, p);
            });
            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
                ui.horizontal(control);
            });
        });
    });
}

fn setting_title(ui: &mut egui::Ui, title: &str, desc: &str, p: Palette) {
    ui.horizontal(|ui| {
        ui.spacing_mut().item_spacing.x = 4.0;
        ui.label(RichText::new(t(title)).strong().size(FONT_BASE));
        help_mark(ui, desc, p);
    });
    ui.add_space(4.0);
}

/// Small grey text under a setting.
fn hint(ui: &mut egui::Ui, text: impl Into<String>, p: Palette) {
    ui.add(egui::Label::new(RichText::new(t(&text.into())).size(11.5).color(p.text3)).wrap());
}

/// A rounded group of related settings, like a macOS settings card.
fn setting_card<R>(ui: &mut egui::Ui, p: Palette, body: impl FnOnce(&mut egui::Ui) -> R) -> R {
    let r = Frame::new()
        .fill(p.hover.gamma_multiply(0.6))
        .stroke(Stroke::new(1.0, p.border.gamma_multiply(0.6)))
        .corner_radius(12)
        .inner_margin(Margin::symmetric(16, 14))
        .show(ui, |ui| {
            ui.set_width(ui.available_width());
            body(ui)
        })
        .inner;
    ui.add_space(12.0);
    r
}

/// A label column so form rows line up.
fn form_row(ui: &mut egui::Ui, label: &str, p: Palette, body: impl FnOnce(&mut egui::Ui)) {
    ui.horizontal(|ui| {
        let (rect, _) = ui.allocate_exact_size(vec2(FORM_LABEL_WIDTH, 28.0), egui::Sense::hover());
        ui.painter().text(rect.left_center(), egui::Align2::LEFT_CENTER, t(label), egui::FontId::proportional(FONT_SM), p.text2);
        body(ui);
    });
}

fn field_label(ui: &mut egui::Ui, text: &str, p: Palette) {
    ui.add_space(4.0);
    ui.label(RichText::new(t(text)).size(FONT_XS).color(p.text2));
}

fn primary_button(text: &str, p: Palette) -> egui::Button<'static> {
    egui::Button::new(RichText::new(t(text)).color(p.on_primary).strong()).fill(p.primary).corner_radius(8).min_size(vec2(72.0, 30.0))
}

fn secondary_button(text: &str) -> egui::Button<'static> {
    egui::Button::new(t(text)).corner_radius(8).min_size(vec2(64.0, 30.0))
}

fn danger_button(text: &str, p: Palette) -> egui::Button<'static> {
    egui::Button::new(RichText::new(t(text)).color(Color32::WHITE).strong()).fill(p.danger).corner_radius(8).min_size(vec2(72.0, 30.0))
}

/// Tallest a dialog may be: the window minus a margin above and below.
fn dialog_max_height(ctx: &egui::Context) -> f32 {
    (ctx.content_rect().height() - WINDOW_SCREEN_MARGIN).max(240.0)
}

/// A centred dialog over a dimmed window: title and × on top, then the caller's body.
/// Returns true when the person asked to close it (×, Esc, or a click outside when `outside_closes`).
fn dialog(ctx: &egui::Context, id: &str, title: &str, width: f32, outside_closes: bool, p: Palette, content: impl FnOnce(&mut egui::Ui)) -> bool {
    let dark = p.pane != LIGHT.pane;
    let mut close = false;
    let resp = egui::Modal::new(egui::Id::unique(("dialog", id)))
        .backdrop_color(Color32::from_black_alpha(if dark { 130 } else { 70 }))
        .frame(
            Frame::new()
                .fill(p.elevated)
                .stroke(Stroke::new(1.0, p.border))
                .corner_radius(16)
                .shadow(egui::epaint::Shadow { offset: [0, 12], blur: 36, spread: 0, color: Color32::from_black_alpha(if dark { 110 } else { 45 }) }),
        )
        .show(ctx, |ui| {
            // Never wider than the window (a narrow window keeps the whole dialog on screen).
            ui.set_width(width.min(ctx.content_rect().width() - 32.0).max(280.0));
            // Header, body and footer sit flush; each sets its own inner spacing.
            ui.spacing_mut().item_spacing.y = 0.0;
            Frame::new().inner_margin(Margin { left: 20, right: 12, top: 12, bottom: 12 }).show(ui, |ui| {
                ui.set_width(ui.available_width());
                ui.horizontal(|ui| {
                    ui.label(RichText::new(t(title)).strong().size(FONT_XL));
                    ui.add_space((ui.available_width() - 28.0).max(0.0));
                    // Drawn, not a glyph: not every Chinese font has "✕".
                    let (rect, r) = ui.allocate_exact_size(vec2(28.0, 28.0), egui::Sense::click());
                    if r.hovered() {
                        ui.painter().rect_filled(rect, 8, p.hover);
                    }
                    let c = rect.center();
                    let stroke = Stroke::new(1.5, if r.hovered() { p.text } else { p.text2 });
                    ui.painter().line_segment([c + vec2(-5.0, -5.0), c + vec2(5.0, 5.0)], stroke);
                    ui.painter().line_segment([c + vec2(-5.0, 5.0), c + vec2(5.0, -5.0)], stroke);
                    if r.on_hover_text(t("關閉（Esc）")).clicked() {
                        close = true;
                    }
                });
            });
            let r = ui.min_rect();
            ui.painter().hline(r.x_range(), r.bottom(), Stroke::new(1.0, p.border));
            content(ui);
        });
    let escape = ctx.input(|i| i.key_pressed(Key::Escape));
    close || escape || (outside_closes && resp.backdrop_response.clicked())
}

/// The scrolling middle of a dialog, `reserve` px kept free for its footer.
fn dialog_body<R>(ui: &mut egui::Ui, id: impl std::hash::Hash + std::fmt::Debug, max_height: f32, body: impl FnOnce(&mut egui::Ui) -> R) -> R {
    egui::ScrollArea::vertical()
        .id_salt(id)
        .max_height(max_height)
        .auto_shrink([false, true])
        .show(ui, |ui| {
            Frame::new().inner_margin(Margin { left: 20, right: 20, top: 16, bottom: 16 }).show(ui, |ui| {
                ui.set_width(ui.available_width());
                ui.spacing_mut().item_spacing.y = 6.0;
                body(ui)
            })
            .inner
        })
        .inner
}

/// The bottom bar of a dialog: a line above, buttons laid out right to left.
fn dialog_footer(ui: &mut egui::Ui, p: Palette, body: impl FnOnce(&mut egui::Ui)) {
    let top = ui.cursor().top();
    ui.painter().hline(ui.max_rect().x_range(), top, Stroke::new(1.0, p.border));
    Frame::new().inner_margin(Margin::symmetric(20, 12)).show(ui, |ui| {
        ui.set_width(ui.available_width());
        ui.spacing_mut().item_spacing.y = 6.0;
        ui.horizontal(|ui| body(ui));
    });
}


#[cfg(test)]
mod tests {
    #[test]
    fn group_members_see_each_other_as_labelled_words() {
        let st = State::demo();
        let (a, b) = (st.bots[1].id, st.bots[2].id);
        let mut tool_step = Message { author: a, ..Message::assistant("", "x") };
        tool_step.tool_calls.push(crate::model::ToolCall { id: "t1".into(), name: "shell".into(), args: "{}".into(), status: Default::default() });
        let msgs = vec![
            Message::user("大家覺得呢？"),
            tool_step,
            Message::tool_result("t1", "shell", "secret output"),
            Message { author: a, reactions: vec!["👍".into()], ..Message::assistant("我覺得可以", "x") },
        ];
        let h = super::group_history(&msgs, Some(b), &st);
        assert_eq!(h.len(), 2, "{h:?}");
        assert_eq!(h[1].role, Role::User);
        assert!(h[1].text.starts_with(&format!("【{}】我覺得可以", st.bots[1].name)) && h[1].text.contains("👍"));
        // The speaker's own steps stay as they are.
        let own = super::group_history(&msgs, Some(a), &st);
        assert_eq!(own.len(), 4);
    }

    #[test]
    fn transcript_export_reads_like_a_chat() {
        let st = State::demo();
        let b = &st.bots[0];
        let md = super::transcript_markdown(b);
        assert!(md.starts_with(&format!("# {} 的對話", b.name)));
        assert!(md.contains("**你**："));
    }

    use super::*;

    /// The relaunch helper waits for the old copy to exit before starting the new one.
    #[test]
    fn relaunch_waits_for_the_old_copy() {
        let dir = std::env::temp_dir().join(format!("anybot-relaunch-{}", std::process::id()));
        std::fs::create_dir_all(&dir).unwrap();
        let marker = dir.join("started");
        let fake_app = dir.join("fake-app.sh");
        std::fs::write(&fake_app, format!("#!/bin/sh\necho \"${{ANYBOT_SHOT_VIEW:-clean}}\" > '{}'\n", marker.display())).unwrap();
        std::process::Command::new("chmod").arg("+x").arg(&fake_app).status().unwrap();
        let mut old = std::process::Command::new("sleep").arg("1").spawn().unwrap();
        // A leftover start-up switch in this copy's environment must not reach the new copy.
        std::env::set_var("ANYBOT_SHOT_VIEW", "leftover");
        relaunch_command(old.id(), &fake_app).spawn().unwrap();
        std::env::remove_var("ANYBOT_SHOT_VIEW");
        std::thread::sleep(std::time::Duration::from_millis(500));
        assert!(!marker.exists(), "started before the old copy exited");
        old.wait().unwrap();
        std::thread::sleep(std::time::Duration::from_millis(700));
        assert_eq!(std::fs::read_to_string(&marker).unwrap().trim(), "clean");
    }
}