refactor(reader): the unit's tables move into reader/models

VideoState, Playlist, PlaylistItem, SavedView, ComfortPin, Tag and ChannelTag leave app/models.py
for app/reader/models.py; app.tables registers them. No schema change.

backend/tests/test_abuse_limits.py

@@ -106,7 +106,7 @@ def test_the_single_playlist_repull_shares_the_pull_cooldown(db, as_user, make_u
     # SEC-14, the sweep half: `revert-youtube` spends under the SAME QuotaAction.PLAYLISTS_PULL key
     # as the bulk `sync-youtube`, so limiting only one of them left the identical drain open one
     # route over. Both must draw on the one allowance.
-    from app.models import Playlist
+    from app.reader.models import Playlist
     from app.routes import playlists as plroutes
 
     user = make_user()

backend/tests/test_autotag_orphans.py

@@ -7,7 +7,8 @@ drops an unknown id, so the view silently showed the whole feed under its old na
 
 from sqlalchemy import select
 
-from app.models import Channel, ChannelTag, SavedView, Tag
+from app.models import Channel
+from app.reader.models import ChannelTag, SavedView, Tag
 from app.sync import autotag
 
 

backend/tests/test_channel_tags.py

@@ -14,7 +14,8 @@ import app.state as state
 from app.auth import current_user
 from app.db import get_db
 from app.main import app
-from app.models import Channel, ChannelTag, Tag, User
+from app.models import Channel, User
+from app.reader.models import ChannelTag, Tag
 
 
 def test_channel_detail_returns_only_this_users_tag_ids(db, monkeypatch, override_dep):

backend/tests/test_collation.py

@@ -9,17 +9,8 @@ from app.auth import current_user
 from app.collation import sorted_words
 from app.db import get_db
 from app.main import app
-from app.models import (
-    Channel,
-    Playlist,
-    PlaylistItem,
-    PlexCollection,
-    PlexItem,
-    PlexLibrary,
-    Subscription,
-    User,
-    Video,
-)
+from app.models import Channel, PlexCollection, PlexItem, PlexLibrary, Subscription, User, Video
+from app.reader.models import Playlist, PlaylistItem
 from datetime import datetime, timezone
 
 WORDS = ["Zorró", "Életrajzi", "Ötödik", "oroszlán", "Csillag", "Cukor"]

backend/tests/test_discover.py

@@ -20,18 +20,15 @@ from app.plex.cards import leaf_card
 from app.models import (
     BlockedChannel,
     Channel,
-    ComfortPin,
     PlexItem,
     PlexLibrary,
     PlexShow,
     PlexState,
-    Playlist,
-    PlaylistItem,
     Subscription,
     User,
     Video,
-    VideoState,
 )
+from app.reader.models import ComfortPin, Playlist, PlaylistItem, VideoState
 
 NOW = datetime(2026, 6, 1, tzinfo=timezone.utc)
 

backend/tests/test_empty_listing_guards.py

@@ -12,15 +12,8 @@ contradicts the remote's own count is not believed either.
 import pytest
 from sqlalchemy import select
 
-from app.models import (
-    Channel,
-    Playlist,
-    PlaylistItem,
-    PlexCollection,
-    PlexItem,
-    PlexLibrary,
-    Video,
-)
+from app.models import Channel, PlexCollection, PlexItem, PlexLibrary, Video
+from app.reader.models import Playlist, PlaylistItem
 from app.plex import sync as plex_sync
 from app.sync import playlists as plsync
 from app.youtube.client import YouTubeError

backend/tests/test_feed_views.py

@@ -14,7 +14,8 @@ import pytest
 
 from app import feedquery
 
-from app.models import Channel, ChannelTag, Subscription, Tag, Video, VideoState
+from app.models import Channel, Subscription, Video
+from app.reader.models import ChannelTag, Tag, VideoState
 
 
 def _dt(day: int) -> datetime:

backend/tests/test_maintenance_lifecycle.py

@@ -12,7 +12,8 @@ from datetime import datetime, timedelta, timezone
 import pytest
 from sqlalchemy import select
 
-from app.models import Channel, Notification, Playlist, PlaylistItem, Video
+from app.models import Channel, Notification, Video
+from app.reader.models import Playlist, PlaylistItem
 from app.sync import maintenance
 
 

backend/tests/test_playlist_add_position.py

@@ -8,7 +8,8 @@ the position is an index over the ORDERED rows, and the list is renumbered aroun
 
 from datetime import datetime, timezone
 
-from app.models import Channel, Playlist, PlaylistItem, Video
+from app.models import Channel, Video
+from app.reader.models import Playlist, PlaylistItem
 
 
 def _seed(db, user, ids, *, positions=None, **kw):

backend/tests/test_playlist_merge.py

@@ -10,7 +10,8 @@ from datetime import datetime, timezone
 
 import pytest
 
-from app.models import Channel, Playlist, PlaylistItem, Video
+from app.models import Channel, Video
+from app.reader.models import Playlist, PlaylistItem
 from app.sync import playlists as pl_mod
 from app.sync.playlist_merge import merge_plan
 from app.sync.playlists import (

backend/tests/test_playlist_move.py

@@ -16,7 +16,8 @@ from datetime import datetime, timedelta, timezone
 import pytest
 from sqlalchemy.exc import OperationalError
 
-from app.models import Channel, Playlist, PlaylistItem, Video
+from app.models import Channel, Video
+from app.reader.models import Playlist, PlaylistItem
 
 
 def _seed_videos(db, ids):

backend/tests/test_playlist_position_lock.py

@@ -19,16 +19,8 @@ from datetime import datetime, timezone
 import pytest
 from sqlalchemy import event
 
-from app.models import (
-    Channel,
-    Playlist,
-    PlaylistItem,
-    PlexItem,
-    PlexLibrary,
-    PlexPlaylist,
-    PlexPlaylistItem,
-    Video,
-)
+from app.models import Channel, PlexItem, PlexLibrary, PlexPlaylist, PlexPlaylistItem, Video
+from app.reader.models import Playlist, PlaylistItem
 
 
 @pytest.fixture

backend/tests/test_playlist_sync_claim.py

@@ -10,7 +10,7 @@ from sqlalchemy import text
 
 from app.auth import require_write_scope
 from app.db import SessionLocal
-from app.models import Playlist
+from app.reader.models import Playlist
 from app.routes import playlists as plroutes
 from app.sync import playlists as plsync
 

backend/tests/test_playlist_sync_lock_order.py

@@ -18,7 +18,8 @@ import pytest
 from sqlalchemy import delete, event, text
 
 from app.db import SessionLocal
-from app.models import Channel, Playlist, PlaylistItem, Video
+from app.models import Channel, Video
+from app.reader.models import Playlist, PlaylistItem
 from app.sync import playlists as pl_mod
 
 ITEMS = PlaylistItem.__table__.name

backend/tests/test_tag_suggest.py

@@ -11,7 +11,8 @@ network, pure DB state.
 Uses the DB lane (`db` fixture) — skipped when no Postgres is reachable.
 """
 
-from app.models import Channel, ChannelTag, Subscription, Tag, User
+from app.models import Channel, Subscription, User
+from app.reader.models import ChannelTag, Tag
 from app.sync.tagsuggest import (
     AUTOAPPLY_THRESHOLD,
     CHAR_SUPPORT,