Features:
- Wait for user ENTER in visible mode (GEMINI_BROWSER_VISIBLE=true)
- Save screenshot to /tmp/gemini-debug.png
- Save HTML to /tmp/gemini-debug.html
- JavaScript-based element detection
- Multi-strategy wait (A: selectors, B: time, C: JS, D: debug)
- Detailed logging of each strategy attempt
- Page structure dump in debug mode
This helps identify why input field is not found