extend chat model with CRUD actions for event changes

- Add ProposedEventChange type with create/update/delete actions
- Replace proposedEvent with proposedChange in ChatMessage
- Add currentDate to AIContext for time-aware AI responses
- Add AI test endpoint for development (/api/ai/test)
- Fix MongoUserRepository type safety with explicit toUser mapping
- Update CLAUDE.md documentation

apps/server/src/app.ts

@@ -45,6 +45,27 @@ app.get('/health', (_, res) => {
   res.json({ status: 'ok' });
 });
 
+// AI Test endpoint (for development only)
+app.post('/api/ai/test', async (req, res) => {
+  try {
+    const { message } = req.body;
+    if (!message) {
+      res.status(400).json({ error: 'message is required' });
+      return;
+    }
+    const result = await aiProvider.processMessage(message, {
+      userId: 'test-user',
+      conversationHistory: [],
+      existingEvents: [],
+      currentDate: new Date(),
+    });
+    res.json(result);
+  } catch (error) {
+    console.error('AI test error:', error);
+    res.status(500).json({ error: String(error) });
+  }
+});
+
 // Start server
 async function start() {
   try {