feat: replace icon with new branded SVG-derived ICO (16/32/48/256px)

docs: add website link

docs: add thumbnail, document ha_integration and secrets.json.example

Update clawscummer.ps1 + add .cmd shim for tui.py

Add tui.py: Textual TUI launcher, replaces pywebview GUI

Fix Gemini prompt injection: detect ⠋ Initializing spinner

Fix Gemini: prompt detection + response reading

Add _output_callbacks and _notify_callbacks to TerminalManager

Fix add-account modal: show Done button after auth window opens

Fix response display, debug bar, modal crash, handoff injection

Update README

Fix response detection: match prompt text instead of snapshot comparison

Add import credentials option for remote account setup

Auth: open in separate console window instead of PTY

Fix non-.CMD cmdline: don't include exe name (pywinpty prepends it)