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/models.py

@@ -96,6 +96,7 @@ class TelegramChat(SQLModel, table=True):
     chat_type: str = Field(default="private")
     username: str = Field(default="")
     language_code: str = Field(default="")
+    commands_enabled: bool = Field(default=False)
     discovered_at: datetime = Field(default_factory=_utcnow)