feat: per-chat command toggle, listener name + toggle in bot tab

- Add commands_enabled field to TelegramChat (default off) with
  migration, gating command dispatch in both poller and webhook
- Show toggle switch per chat in bot tab for enabling/disabling commands
- Fix listener response to include bot name instead of just type
- Replace listener "Enabled" label + "Edit" link with toggle switch
  and crosslink to command-trackers page

packages/server/src/notify_bridge_server/database/migrations.py

@@ -207,6 +207,13 @@ async def migrate_schema(engine: AsyncEngine) -> None:
                 )
                 logger.info("Added language_code column to telegram_chat table")
 
+            # Add commands_enabled to telegram_chat if missing (default disabled)
+            if not await _has_column(conn, "telegram_chat", "commands_enabled"):
+                await conn.execute(
+                    text("ALTER TABLE telegram_chat ADD COLUMN commands_enabled INTEGER DEFAULT 0")
+                )
+                logger.info("Added commands_enabled column to telegram_chat table")
+
 
 # ---------------------------------------------------------------------------
 # Legacy tracker_target migration (pre-Phase 1)