feat: reorganize room edit dialog and fix Force Sync button

- Move WebHook configuration from General to dedicated WebHook tab
- Add WebHook tab after Share tab in room edit dialog
- Fix Force Sync button not appearing by adding missing isEditing prop
- Fix indentation issues in MeetingSelection component

🤖 Generated with [Claude Code](https://claude.ai/code)

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

server/tests/test_calendar_event.py

@@ -36,7 +36,7 @@ async def test_calendar_event_create():
         description="Weekly team sync",
         start_time=now + timedelta(hours=1),
         end_time=now + timedelta(hours=2),
-        location=f"https://example.com/room/{room.name}",
+        location=f"https://example.com/{room.name}",
         attendees=[
             {"email": "alice@example.com", "name": "Alice", "status": "ACCEPTED"},
             {"email": "bob@example.com", "name": "Bob", "status": "TENTATIVE"},