feat(ui): order agent runtimes by recent use

[luokerenx4]

Summary

• add a persisted MRU queue for successfully launched agent runtimes
• keep Pi, Codex, Claude Code, and Grok Build as the cold-start fallback order
• promote a runtime only after Session creation succeeds; selection and failed launches do not reorder
• retain manual quick-access preferences as the baseline behind recent usage

Verification

• pnpm exec vitest run src/core/preferences.spec.ts src/webui/routes/preferences.spec.ts ui/src/lib/agentRuntimeQuickAccess.spec.ts ui/src/hooks/useAgentRuntimes.spec.ts
• npx tsc --noEmit
• cd ui && npx tsc -b
• pnpm test (561 passed, 1 skipped; 4761 tests passed, 9 skipped)
• verified the real Chat runtime selector in browser

[vercel]

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Project	Deployment	Actions	Updated (UTC)
openalice-demo	Building	Preview	Aug 18, 2026 6:14pm