style: apply ruff format across backend + scripts (line-length 100)

Mechanical, whole-tree `ruff format` pass — no behaviour change. Recorded in
.git-blame-ignore-revs (next commit) so git blame skips it.

backend/tests/test_saved_views_source.py

@@ -1,6 +1,7 @@
 """ask 4: saved views are per-module (`source`). Feed and Plex views are separate lists, may share a
 name, and each has its own single default. DB lane (`db` fixture) — skipped without Postgres.
 """
+
 from fastapi.testclient import TestClient
 
 import app.state as state
@@ -11,7 +12,9 @@ from app.models import User
 
 
 def _client(db, user, monkeypatch):
-    monkeypatch.setattr(state, "_configured_cache", True)  # the request gate 503s an unconfigured app
+    monkeypatch.setattr(
+        state, "_configured_cache", True
+    )  # the request gate 503s an unconfigured app
     app.dependency_overrides[get_db] = lambda: db
     app.dependency_overrides[current_user] = lambda: user  # require_human resolves through this
     return TestClient(app)
@@ -29,8 +32,12 @@ def test_views_are_scoped_by_source(db, monkeypatch):
     try:
         c = _client(db, user, monkeypatch)
         # Same NAME under two sources is allowed (unique is per user+source now).
-        f = c.post("/api/saved-views", json={"name": "Fresh", "filters": {"a": 1}, "source": "feed"})
-        p = c.post("/api/saved-views", json={"name": "Fresh", "filters": {"b": 2}, "source": "plex"})
+        f = c.post(
+            "/api/saved-views", json={"name": "Fresh", "filters": {"a": 1}, "source": "feed"}
+        )
+        p = c.post(
+            "/api/saved-views", json={"name": "Fresh", "filters": {"b": 2}, "source": "plex"}
+        )
         assert f.status_code == 200 and p.status_code == 200, (f.text, p.text)
 
         feed = c.get("/api/saved-views?source=feed").json()