feat(agents): add BabuCare predefined agent bootstrap files

Vietnamese baby care AI companion for parents (mẹ và bé), covering
pregnancy through early childhood (0-2 years).

- IDENTITY.md: warm pediatric nurse persona, emoji 👶
- SOUL.md: evidence-based guidelines, emergency protocol (115), non-judgmental parenting support
- AGENTS.md: full operating manual with E.A.S.Y routine tracking, Wonder Weeks cron alerts, onboarding flow, memory structure
- USER_PREDEFINED.md: Vietnamese-first baseline for all users

Skills (installed to ~/.goclaw/skills-store/):
- baby-routine: E.A.S.Y tracker with wake window calc + cron reminders
- wonder-weeks: 10 developmental leaps from due date + stormy/sunny alerts
- baby-food: BLW + allergen tracking + Vietnamese baby food recipes
- family-tasks: Fizzy-based task/vaccination/shopping management

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Merge branch 'nextlevelbuilder:main' into main

feat(agents): add BabuCare predefined agent bootstrap files

Vietnamese baby care AI companion for parents (mẹ và bé), covering
pregnancy through early childhood (0-2 years).

- IDENTITY.md: warm pediatric nurse persona, emoji 👶
- SOUL.md: evidence-based guidelines, emergency protocol (115), non-judgmental parenting support
- AGENTS.md: full operating manual with E.A.S.Y routine tracking, Wonder Weeks cron alerts, onboarding flow, memory structure
- USER_PREDEFINED.md: Vietnamese-first baseline for all users

Skills (installed to ~/.goclaw/skills-store/):
- baby-routine: E.A.S.Y tracker with wake window calc + cron reminders
- wonder-weeks: 10 developmental leaps from due date + stormy/sunny alerts
- baby-food: BLW + allergen tracking + Vietnamese baby food recipes
- family-tasks: Fizzy-based task/vaccination/shopping management

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

fix: improve resilience and graceful shutdown

- Graceful shutdown: drain in-flight agent runs (up to 30s) before exit
- Compaction: return original messages on failure instead of nil
- WebSocket: prevent double-close with sync.Once
- Chat: add panic recovery in chat.send goroutine
- OpenAI provider: detect stream errors and reject non-JSON responses
- WS client: reset auth state on auth failure
- UI: wrap app in ErrorBoundary, stabilize useWsEvent handler ref

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Merge branch 'nextlevelbuilder:main' into main