feat: disable AI summary/transcription when room recording is off

- Unchecking "allow recording" in room settings now also clears the
  transcript/AI summary checkbox (it was only greyed out before, so a
  previously enabled value stayed checked and got saved)
- Server enforces the coupling on room create and update: with
  recording disabled, recording_transcript is always stored as 0

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server/routes/rooms.js

@@ -244,7 +244,8 @@ router.post('/', authenticateToken, async (req, res) => {
       record_meeting !== false ? 1 : 0,
       guest_access ? 1 : 0,
       moderator_code || null,
-      recording_transcript ? 1 : 0,
+      // Transcription/AI summary requires recording to be enabled
+      (record_meeting !== false && recording_transcript) ? 1 : 0,
     ]);
 
     const room = await db.get('SELECT * FROM rooms WHERE id = ?', [result.lastInsertRowid]);
@@ -306,6 +307,9 @@ router.put('/:uid', authenticateToken, async (req, res) => {
       }
     }
 
+    // Transcription/AI summary requires recording — force it off when recording ends up disabled
+    const effectiveRecordMeeting = record_meeting !== undefined ? !!record_meeting : !!room.record_meeting;
+
     await db.run(`
       UPDATE rooms SET
         name = COALESCE(?, name),
@@ -338,7 +342,7 @@ router.put('/:uid', authenticateToken, async (req, res) => {
       moderator_code !== undefined ? (moderator_code || null) : room.moderator_code,
       learning_analytics !== undefined ? (learning_analytics ? 1 : 0) : null,
       analytics_visibility && ['owner', 'shared'].includes(analytics_visibility) ? analytics_visibility : null,
-      recording_transcript !== undefined ? (recording_transcript ? 1 : 0) : null,
+      !effectiveRecordMeeting ? 0 : (recording_transcript !== undefined ? (recording_transcript ? 1 : 0) : null),
       req.params.uid,
     ]);