Add smart alert profiles and recording timeline (Tasks 4-5)

Task 4 — Alert Profiles: presence-aware + time-of-day alert routing.
Profiles match household state (EMPTY/KIDS_HOME/ADULTS_HOME/ALL_HOME)
and time windows (sleep hours). Per-detection-type rules control
push/record/quiet behavior with role-based recipients (all vs adults).

Task 5 — Recording Timeline: canvas-based 24h timeline per camera
with color-coded segments (person=red, vehicle=blue, motion=gray).
Click-to-play, date picker, detection type filters, hour markers.
Timeline API endpoint returns segments for a camera+date.

All 5 daily-use feature tasks complete. 140 tests passing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/unit/test_timeline.py

@@ -0,0 +1,39 @@
+"""Tests for recording timeline."""
+
+import time
+
+from vigilar.storage.queries import get_timeline_data, insert_recording
+
+
+class TestTimelineQuery:
+    def test_returns_recordings_for_day(self, test_db):
+        now = int(time.time())
+        insert_recording(test_db, camera_id="cam1", started_at=now, ended_at=now+60,
+                         file_path="/tmp/a.mp4", trigger="MOTION", detection_type="person")
+        insert_recording(test_db, camera_id="cam1", started_at=now+100, ended_at=now+130,
+                         file_path="/tmp/b.mp4", trigger="MOTION", detection_type="motion")
+
+        results = get_timeline_data(test_db, "cam1", now - 3600, now + 3600)
+        assert len(results) == 2
+        assert results[0]["detection_type"] == "person"
+        assert results[1]["detection_type"] == "motion"
+
+    def test_filters_by_camera(self, test_db):
+        now = int(time.time())
+        insert_recording(test_db, camera_id="cam1", started_at=now, ended_at=now+60,
+                         file_path="/tmp/a.mp4", trigger="MOTION")
+        insert_recording(test_db, camera_id="cam2", started_at=now, ended_at=now+60,
+                         file_path="/tmp/b.mp4", trigger="MOTION")
+
+        results = get_timeline_data(test_db, "cam1", now - 3600, now + 3600)
+        assert len(results) == 1
+
+    def test_filters_by_time_range(self, test_db):
+        now = int(time.time())
+        insert_recording(test_db, camera_id="cam1", started_at=now - 7200, ended_at=now - 7100,
+                         file_path="/tmp/old.mp4", trigger="MOTION")
+        insert_recording(test_db, camera_id="cam1", started_at=now, ended_at=now+60,
+                         file_path="/tmp/new.mp4", trigger="MOTION")
+
+        results = get_timeline_data(test_db, "cam1", now - 3600, now + 3600)
+        assert len(results) == 1