Root cause: AgentComplete unconditionally calls resume_terminal()
even when the terminal was never paused, causing a secondary
EnterAlternateScreen on Windows that creates a new buffer whose
width may differ from the window width. Additionally,
ColorCompatBackend had no terminal_size cache, so size() fell
through to crossterm::terminal::size() which on Windows returns
the WinAPI buffer width rather than the window width.
Changes:
- AgentComplete: add event_broker.is_paused() guard
- resume_terminal(): cache real terminal size before reset_viewport
- Resize handler: also set terminal_size alongside forced_size
- subagent_routing: 3x mark_history_updated -> bump_history_cell(idx)
- color_compat: add terminal_size field, set_terminal_size(), fix
size() fallback priority (forced_size > terminal_size)
- tests: 3 unit tests for size() fallback chain
Review feedback addressed:
- forced_size now takes priority over terminal_size (gemini-code-assist)
- Redundant map lookups removed in subagent_routing (both bots)
- set_terminal_size moved before reset_terminal_viewport (greptile-apps)
(cherry picked from commit 4463c46644a6e485e7e20dc2b19c29c2e8eb3c5c)
jrcjrcc
7b2a7e513d