Refactor UI assets and harden quality checks

tests/test_scheduler.py

@@ -2,7 +2,6 @@ import asyncio
 import logging
 import sqlite3
 import time
-from contextlib import contextmanager
 from datetime import UTC, datetime, timedelta
 from pathlib import Path
 
@@ -324,10 +323,8 @@ def test_rate_limit_flush_requeues_counts_after_database_failure(
 
     original_connect = store.connect
 
-    @contextmanager
     def fail_connect():
         raise RuntimeError("database temporarily unavailable")
-        yield
 
     monkeypatch.setattr(store, "connect", fail_connect)
     with pytest.raises(RuntimeError, match="database temporarily unavailable"):
@@ -416,7 +413,11 @@ def test_scheduled_cleanup_failure_is_logged(tmp_path: Path, monkeypatch, caplog
 
 
 def test_scheduler_loop_survives_iteration_exception(tmp_path: Path, monkeypatch, caplog) -> None:
-    settings = DdnsSettings(database_path=tmp_path / "ddns.sqlite3", admin_password="admin", cleanup_interval_seconds=60)
+    settings = DdnsSettings(
+        database_path=tmp_path / "ddns.sqlite3",
+        admin_password="admin",
+        cleanup_interval_seconds=60,
+    )
     store = DdnsStore(settings.database_path)
     calls = 0