Performance

• Startup Performance — Major optimization to server startup and control bootstrap (#64):
  • Control bootstrap score improved 42.9% (3987 → 2278)
  • Packed bundle reduced from 3635 KB to 2195 KB
  • Server ready time reduced from 338ms to 68ms
  • Control bootstrap time reduced from 343ms to 71ms
• Prompt Templates — Converted system model prompts from markdown to JSON format for faster loading and deduplication
• Runtime Schema Split — Extracted schema.sessionRuntime.ts from session schemas for lazy loading
• Session Bootstrap — Fast-path for control session startup with lazy initialization of non-critical subsystems

Fixes

• Fixed prompt readiness tracking so empty skill catalogs don't trigger reloads on every turn
• Fixed child session skill preservation across session boundaries
• Desktop Composer — Fixed busy composer hint overlapping footer controls (#65, @jasoncantor)
  • Dedicated status row for steering/streaming hints above the textarea
  • Composer footer now wraps properly on narrow layouts
  • Restored submit button color tokens (primary, warning, destructive)