feat: conventional layered Ctrl+C handling in TUI - #7
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Ctrl+C now means 'interrupt', not 'quit', following coding-agent TUI conventions (claude/codex behave the same way): - turn running → interrupt the turn (same as Esc) - composer has text → clear the draft - idle & empty → arm a 1.5s confirm window, second press exits - Ctrl+D on empty input exits (shell EOF convention) - exit paths (/exit, double Ctrl+C, Ctrl+D) now shut down gracefully: close both agent subprocesses before process.exit - renderer exitOnCtrlC disabled; layered policy lives in src/tui/keys.ts as a pure function with unit tests Verified: bun run check green (70 tests, 4 new); pty smoke passes.
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Ctrl+C now means 'interrupt', not 'quit', following coding-agent TUI
conventions (claude/codex behave the same way):
close both agent subprocesses before process.exit
as a pure function with unit tests
Verified: bun run check green (70 tests, 4 new); pty smoke passes.