Tara Menon 1d8e26e683 CLI UX: Input prompt (»), G> output prefix, answering spinner ...

Three UX improvements for interactive mode:

1. Input prompt: Shows '»' (bold cyan) on stdin before reading user input
2. Output prefix: Agent responses prefixed with 'G>' (bold green)
3. Thinking indicator: Animated spinner on stderr showing 'answering (N.Ns)'
   with braille frame characters, auto-clears when response arrives
   - Start/stop via tokio::sync::watch channel + tokio::spawn
   - Only shows when interactive (atty detection)
   - Does not affect gateway/sub-agent modes

2026-06-12 11:56:10 +05:30

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