feat(coord): add todos system with per-user/machine/project scoping

New coord_todos table and API endpoints (GET/POST/PUT/DELETE /api/coord/todos)
supporting manual and auto-created items, sub-tasks via parent_id, and inclusive
for_user/for_machine filters (OR-null) for sync/save display. sync.sh Phase 7
now shows pending todos grouped by project after every sync. CLAUDE.md documents
auto-creation behavior for unresolved follow-up. Web/email pricing doc updated:
block time rate clarified, INKY reference removed, dates updated.

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

api/main.py

@@ -49,6 +49,7 @@ from api.routers import (
     coord_components,
     coord_messages,
     coord_status,
+    coord_todos,
 )
 
 # Import middleware
@@ -162,6 +163,7 @@ app.include_router(coord_locks.router, prefix="/api/coord/locks", tags=["Coordin
 app.include_router(coord_components.router, prefix="/api/coord/components", tags=["Coordination"])
 app.include_router(coord_messages.router, prefix="/api/coord/messages", tags=["Coordination"])
 app.include_router(coord_status.router, prefix="/api/coord/status", tags=["Coordination"])
+app.include_router(coord_todos.router, prefix="/api/coord/todos", tags=["Coordination"])
 
 
 if __name__ == "__main__":