chore: auto-commit (23 archivos)

- app.md
- backend/dist/assets/index-CFDWXN9Z.js
- backend/dist/index.html
- backend/handlers.go
- backend/main.go
- backend/users.go
- e2e/smoke_live.sh
- frontend/src/App.tsx
- frontend/src/api.ts
- frontend/src/components/CardChatPanel.tsx
- ...

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app.md

@@ -2,7 +2,7 @@
 name: kanban
 lang: go
 domain: tools
-version: 0.2.0
+version: 0.3.0
 description: "Kanban board con persistencia SQLite, drag-and-drop entre columnas (dnd-kit) y tracking del tiempo que cada tarjeta pasa en cada columna. Frontend Vite + React + Mantine v9 embebido en el binario Go."
 tags: [service, kanban, web, dnd-kit, mantine, sqlite, time-tracking]
 uses_functions: