v0.12.26 FCM feature changes

backend/src/routes/push.js

@@ -36,6 +36,10 @@ async function sendPushToUser(schema, userId, payload) {
       'SELECT * FROM push_subscriptions WHERE user_id = $1 AND fcm_token IS NOT NULL',
       [userId]
     );
+    if (subs.length === 0) {
+      console.log(`[Push] No FCM token for user ${userId} (schema=${schema})`);
+      return;
+    }
     for (const sub of subs) {
       try {
         await messaging.send({
@@ -70,6 +74,7 @@ async function sendPushToUser(schema, userId, payload) {
             fcm_options: { link: payload.url || '/' },
           },
         });
+        console.log(`[Push] Sent to user ${userId} device=${sub.device} schema=${schema}`);
       } catch (err) {
         // Remove stale tokens
         const stale = [