Ian MacLeod 78600239a1
Honor system reduced-motion preferences in the TUI ( #44666 ) ...
## Why
The TUI should respect the host's accessibility preference even when `tui.animations` is enabled.
## What changed
- Read the system motion preference once at launch on macOS, Windows, and Linux. Changes to that preference require restarting the TUI.
- Suppress animations when reduced motion is requested without changing saved configuration. Preserve configured behavior when detection is unavailable, and limit the Linux portal query to 250 ms.
- Use the effective animation setting for voice controls and transcripts, and honor system reduced motion in the startup composer.
## Testing
Add tests for animation preference resolution and preservation of saved settings, plus composer snapshots without sparkles at widths of 40 and 80 columns.
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78600239a1