* fix(app): preserve composer capacity when the keyboard closes
Releasing the keyboard reservation enlarged an unchanged capped draft. Retain the last editing reservation while still recalculating capacity for viewport changes and subsequent keyboard openings.
* perf(app): isolate composer editing and resize updates
Draft and cursor subscriptions rerendered the chat and full composer on every native edit. Give editing consumers a live text source, preserve attachment identity on text updates, and read viewport settling state without a render.
Read live input text for web resize measurement so removing per-keystroke props does not collapse a draft when its width changes.
* fix(app): restore current draft when the composer remounts
The last replacement command does not include subsequent edits. Seed remounted editors from the live draft snapshot so switching launch modes restores the saved text without subscribing the composer to every edit.
* fix(app): synchronize composer resolution state before paint
Avoid an extra passive-effect delay when forwarding forge resolution state from the isolated binding. Exercise live-text width measurement through the actual composer E2E journey instead of a hook-only test component.
JavaScript height state competed with native intrinsic layout across draft and agent ownership transitions. Let native inputs own sizing and scrolling while preserving DOM measurement on web.
Native Fabric can omit the initial content-size callback and retain stale size after deletion. Keep the common composer surface free of platform branches while native and web adapters own their measurement mechanisms.
Mohamed Boudra