perf(api): historia ogladania wsadowo, wyszukiwanie w obrebie strony po rownosci originu

- /watch/recent: _build_scenes_out_batch(light) zamiast 5-7 zapytan na scene (N+1 w Sentry)
- /scenes?origin=tube❌ rownosc zamiast ILIKE '%...%', 4,6 s -> 1,1 s na hdporngg z q

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/api/scenes.py

@@ -383,13 +383,21 @@ def list_scenes(
         base = base.where(~live_playback_exists())
 
     if origin:
-        # Substring match na origin, 'hqporner' złapie 'tube:hqpornercom'.
+        # Pelny origin z ekranu strony ('tube:hdporngg') porownujemy wprost: rownosc idzie
+        # po ix_playback_sources_origin_live, a ILIKE '%...%' przeszukiwal kazde zrodlo
+        # kazdej kandydujacej sceny (wyszukiwanie w obrebie strony 4,6 s, Sentry Slow DB
+        # Query 2026-09-15). Krotka forma z filtra ('hqporner') zostaje substringiem.
+        origin_clause = (
+            PlaybackSource.origin == origin
+            if ":" in origin
+            else PlaybackSource.origin.ilike(f"%{origin}%")
+        )
         base = base.where(
             exists(
                 select(1).where(
                     PlaybackSource.scene_id == Scene.id,
                     PlaybackSource.dead_at.is_(None),
-                    PlaybackSource.origin.ilike(f"%{origin}%"),
+                    origin_clause,
                 )
             )
         )

app/api/watch.py

@@ -20,7 +20,7 @@ from sqlalchemy import desc, select
 from sqlalchemy.orm import Session
 
 from app.api.device import get_device_id
-from app.api.scenes import _build_scene_out
+from app.api.scenes import _build_scenes_out_batch
 from app.api.schemas import SceneOut
 from app.auth import require_api_key
 from app.db import get_session
@@ -237,11 +237,20 @@ def list_recent(
     if not include_finished:
         stmt = stmt.where(ScenePlayProgress.finished.is_(False))
 
+    # Serializacja wsadowa jak w liscie scen: rail „Continue watching" leci przy kazdym
+    # starcie apki, a pelny `_build_scene_out` robil 5-7 zapytan na scene (N+1 w Sentry,
+    # 2026-09-14). Rail uzywa tytulu, miniatury i dlugosci, wiec wersja lekka wystarcza.
+    rows = session.execute(stmt).all()
+    outs = _build_scenes_out_batch(session, [scene for _, scene in rows], light=True, device_id=device_id)
+    out_by_id = {o.id: o for o in outs}
     items: list[WatchEntry] = []
-    for prog, scene in session.execute(stmt).all():
+    for prog, scene in rows:
+        scene_out = out_by_id.get(scene.id)
+        if scene_out is None:
+            continue
         items.append(
             WatchEntry(
-                scene=_build_scene_out(session, scene, device_id=device_id),
+                scene=scene_out,
                 position_sec=prog.position_sec,
                 duration_sec=prog.duration_sec,
                 finished=prog.finished,