fix: use reels_media endpoint for stories (returns actual items)

- /feed/user/{id}/story/ only returns reel metadata, not items
- /feed/reels_media/ with POST returns actual story media
- Batch user IDs (20 per request) for efficiency
- Fallback: reels_tray -> reels_media batch

instagram_monitor.py

@@ -194,10 +194,12 @@ class InstagramMonitor:
         return followees
 
     def _get_user_stories(self, user_pk: int) -> list[dict]:
+        """Fetch stories via reels_media endpoint (returns actual items)."""
         try:
-            resp = self.session.get(
-                f"{API_BASE}/feed/user/{user_pk}/story/",
-                params={"user_id": user_pk},
+            resp = self.session.post(
+                f"{API_BASE}/feed/reels_media/",
+                json={"user_ids": [user_pk]},
+                headers={**IG_HEADERS, "Content-Type": "application/x-www-form-urlencoded"},
                 timeout=30,
             )
             if resp.status_code != 200:
@@ -206,9 +208,7 @@ class InstagramMonitor:
 
             data = resp.json()
             items = data.get("items", [])
-            logger.debug(f"Stories {user_pk}: {len(items)} items, keys={list(data.keys())}")
             if not items:
-                logger.debug(f"Stories {user_pk} raw: {resp.text[:400]}")
                 return []
 
             stories = []
@@ -364,16 +364,36 @@ class InstagramMonitor:
         all_stories = self._get_all_stories()
         total_stories = sum(len(s) for s in all_stories.values())
 
-        # Method 2: per-user stories for known active users (fallback)
+        # Method 2: per-user stories via reels_media (fallback)
         if total_stories == 0:
-            logger.info("reels_tray empty, trying per-user story fetch for followees...")
-            for user in followees[:10]:
-                user_pk = user["pk"]
-                stories = self._get_user_stories(user_pk)
-                if stories:
-                    all_stories[user_pk] = stories
-                    total_stories += len(stories)
-                    logger.info(f"@{user['username']}: {len(stories)} stories via per-user endpoint")
+            logger.info("reels_tray empty, trying reels_media for followees...")
+            # Batch user IDs for reels_media
+            user_pks = [u["pk"] for u in followees]
+            for batch_start in range(0, len(user_pks), 20):
+                batch = user_pks[batch_start:batch_start + 20]
+                try:
+                    resp = self.session.post(
+                        f"{API_BASE}/feed/reels_media/",
+                        json={"user_ids": batch},
+                        headers={**IG_HEADERS, "Content-Type": "application/x-www-form-urlencoded"},
+                        timeout=30,
+                    )
+                    if resp.status_code == 200:
+                        data = resp.json()
+                        items = data.get("items", [])
+                        for item in items:
+                            user_info = item.get("user", {})
+                            user_pk = user_info.get("pk", item.get("user_pk", 0))
+                            media_id = str(item.get("pk", item.get("id", "")))
+                            if self.db.is_downloaded(media_id):
+                                continue
+                            if user_pk not in all_stories:
+                                all_stories[user_pk] = []
+                            all_stories[user_pk].append(item)
+                            total_stories += 1
+                        logger.info(f"reels_media batch: {len(items)} stories from {len(data.get('statuses', []))} users")
+                except Exception as e:
+                    logger.error(f"reels_media batch error: {e}")
 
         logger.info(f"Total stories found: {total_stories}")