feat: Add Gemini provider env vars to Makefile and CLI options

- Add PROVIDER, GEMINI_ACCOUNT_DIR, GEMINI_BROWSER_VISIBLE, GEMINI_MAX_SESSIONS to Makefile
- Update gemini-login command to support --visible flag
- Add help text showing env vars and usage examples
- Display session save location and browser visibility on startup

Makefile

@@ -43,6 +43,12 @@ ANTHROPIC_BASE_HOST          ?= $(HOST)
 TLS_CERT           ?=
 TLS_KEY            ?=
 
+# ── Gemini Web Provider ───────────────────────
+PROVIDER           ?= cursor
+GEMINI_ACCOUNT_DIR ?=
+GEMINI_BROWSER_VISIBLE ?= false
+GEMINI_MAX_SESSIONS ?= 3
+
 # ── 記錄 ──────────────────────────────────────
 SESSIONS_LOG       ?=
 
@@ -84,6 +90,12 @@ env:
 	@printf 'CURSOR_BRIDGE_TLS_CERT=%s\n'          "$(TLS_CERT)"            >> $(ENV_FILE)
 	@printf 'CURSOR_BRIDGE_TLS_KEY=%s\n'           "$(TLS_KEY)"             >> $(ENV_FILE)
 	@printf 'CURSOR_BRIDGE_SESSIONS_LOG=%s\n'      "$(SESSIONS_LOG)"        >> $(ENV_FILE)
+	@printf '# ── Provider 設定 ───────────────────────────\n'                    >> $(ENV_FILE)
+	@printf 'CURSOR_BRIDGE_PROVIDER=%s\n'          "$(PROVIDER)"            >> $(ENV_FILE)
+	@printf '# Gemini Web Provider 設定（當 PROVIDER=gemini-web 時使用）\n'       >> $(ENV_FILE)
+	@printf 'GEMINI_ACCOUNT_DIR=%s\n'              "$(GEMINI_ACCOUNT_DIR)"  >> $(ENV_FILE)
+	@printf 'GEMINI_BROWSER_VISIBLE=%s\n'          "$(GEMINI_BROWSER_VISIBLE)" >> $(ENV_FILE)
+	@printf 'GEMINI_MAX_SESSIONS=%s\n'             "$(GEMINI_MAX_SESSIONS)" >> $(ENV_FILE)
 	@echo "已產生 $(ENV_FILE)"
 
 ## 編譯二進位檔

cmd/gemini-login/main.go

@@ -6,12 +6,24 @@ import (
 	"cursor-api-proxy/internal/providers/geminiweb"
 	"fmt"
 	"os"
+	"strings"
 )
 
 func main() {
 	accountName := ""
-	if len(os.Args) > 1 {
-		accountName = os.Args[1]
+	visible := false
+
+	// 解析命令列參數
+	for i := 1; i < len(os.Args); i++ {
+		arg := os.Args[i]
+		if arg == "--visible" || arg == "-v" {
+			visible = true
+		} else if arg == "--help" || arg == "-h" {
+			printHelp()
+			os.Exit(0)
+		} else if !strings.HasPrefix(arg, "-") {
+			accountName = arg
+		}
 	}
 
 	e := env.OsEnvToMap()
@@ -19,10 +31,31 @@ func main() {
 	cfg := config.LoadBridgeConfig(e, "")
 
 	cfg.GeminiAccountDir = loaded.GeminiAccountDir
-	cfg.GeminiBrowserVisible = true
+	// 命令列參數優先於環境變數
+	cfg.GeminiBrowserVisible = visible || loaded.GeminiBrowserVisible
+
+	fmt.Printf("Session 儲存位置: %s\n", cfg.GeminiAccountDir)
+	fmt.Printf("瀏覽器可見: %v\n", cfg.GeminiBrowserVisible)
 
 	if err := geminiweb.RunLogin(cfg, accountName); err != nil {
 		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
 		os.Exit(1)
 	}
 }
+
+func printHelp() {
+	fmt.Println("使用方法: gemini-login [options] [session-name]")
+	fmt.Println("")
+	fmt.Println("選項:")
+	fmt.Println("  --visible, -v    顯示瀏覽器視窗（預設隱藏）")
+	fmt.Println("  --help, -h       顯示此說明")
+	fmt.Println("")
+	fmt.Println("環境變數:")
+	fmt.Println("  GEMINI_ACCOUNT_DIR       Session 儲存目錄（預設: ~/.cursor-api-proxy/gemini-accounts）")
+	fmt.Println("  GEMINI_BROWSER_VISIBLE   是否顯示瀏覽器（true/false，預設: false）")
+	fmt.Println("")
+	fmt.Println("範例:")
+	fmt.Println("  gemini-login my-session")
+	fmt.Println("  gemini-login --visible my-session")
+	fmt.Println("  GEMINI_BROWSER_VISIBLE=true gemini-login")
+}