fix: web UI routines tab shows all routines regardless of creating channel (#391)

Routines created via Telegram (or any WASM channel) were invisible in the
web UI because the routines list endpoint filtered by GATEWAY_USER_ID,
which didn't match the Telegram user's ID stored on the routine.

Add list_all_routines() to the RoutineStore trait (both libSQL and
PostgreSQL backends) and use it in the web dashboard handlers so all
routines are visible regardless of which channel created them.

Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>

src/db/postgres.rs

@@ -373,6 +373,10 @@ impl RoutineStore for PgBackend {
         self.store.list_routines(user_id).await
     }
 
+    async fn list_all_routines(&self) -> Result<Vec<Routine>, DatabaseError> {
+        self.store.list_all_routines().await
+    }
+
     async fn list_event_routines(&self) -> Result<Vec<Routine>, DatabaseError> {
         self.store.list_event_routines().await
     }