fix(desktop): restore motion and reliable canvas output

[FreddyJD]

Summary

• Add a saved app-wide Motion setting: On by default, Follow system, or Reduced, without changing operating-system settings.
• Apply the resolved preference consistently across CSS, canvas, charts, onboarding, and progress indicators, with cross-window synchronization and save-error recovery.
• Keep thinking/tool feedback and streaming updates responsive while pausing unnecessary canvas painting when hidden or offscreen.
• Fix Windows terminal CRLF output, command wrapping, compact short cards, scrollable long output, and full-source copying.
• Add regression coverage for persistence, motion resolution, animation cadence, streaming, and terminal rendering; run the animation suite in Linux CI.

Validation

• Typecheck, formatting, translation catalog synchronization, and store guard passed.
• Shared suite: 1,085 checks passed.
• i18n runtime suite: 18 checks passed.
• Canvas model/diff suite: 47 checks passed.
• Electron canvas interaction suite: 124 checks passed.
• Electron motion/animation suite: 36 checks passed.
• Production build and canvas session-switch performance budget passed locally.

Motion persistence tests use temporary user data and SQLite databases; actual app and OS settings are not modified.