v0.109.0

What's Changed

Features

• feat(macos): center Settings content and add a Back button by @LHagfoss in #2606
• feat(engine): add versioned user-data migration coordinator by @LHagfoss in #2609
• feat(macos): group model, effort and Fast mode in one composer picker by @LHagfoss in #2611
• feat(macos): render finished prose in a selectable text view by @LHagfoss in #2614

Fixes

• fix(macos): close the terminal panel only with its last terminal by @LHagfoss in #2607
• fix(macos): return to the parent chat cleanly when a subagent ends by @LHagfoss in #2610
• fix(engine): compact after a hard trim instead of trimming again by @LHagfoss in #2612
• fix(engine): tell the user when a Fast request is served at the default tier by @LHagfoss in #2615

Refactor

• refactor(macos): move the open-session cache into RustCodeKit by @LHagfoss in #2613

Documentation

• docs(macos): map app architecture and extraction seams by @LHagfoss in #2604
• docs(macos): add the app architecture guide by @LHagfoss in #2605

Chores

• chore(build): bound target directory growth by @LHagfoss in #2601
• chore(ci): release v0.109.0 by @LHagfoss in #2616

Full Changelog: v0.108.0...v0.109.0