Add dashboard summary tiles

Shows rider count, activities imported in the last 7 days, 7-day
sync success rate, and how many riders currently need attention,
right above the rider list where an admin looks first.

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

tests/db/test_repositories.py

@@ -1,4 +1,6 @@
-from app.db.models import ActivityStatus, HealthState
+from datetime import datetime, timedelta, timezone
+
+from app.db.models import ActivityStatus, HealthState, SyncRunStatus
 
 
 def test_create_two_independent_users(db_session, user_repository) -> None:
@@ -129,3 +131,79 @@ def test_scheduler_settings_update_persists_all_fields(scheduler_settings_reposi
     assert reloaded.night_start_hour == 20
     assert reloaded.day_interval_minutes == 10
     assert reloaded.night_interval_minutes == 45
+
+
+def _make_user(repo, name, *, enabled=True, health_state=HealthState.HEALTHY):
+    return repo.create(
+        name=name,
+        enabled=enabled,
+        health_state=health_state,
+        mywhoosh_email_enc=f"mw-{name}",
+        mywhoosh_password_enc=f"mw-pw-{name}",
+        garmin_email_enc=f"g-{name}",
+        garmin_password_enc=f"g-pw-{name}",
+    )
+
+
+def test_dashboard_summary_counts_riders_total_and_enabled(user_repository) -> None:
+    _make_user(user_repository, "Alex", enabled=True)
+    _make_user(user_repository, "Jamie", enabled=True)
+    _make_user(user_repository, "Paused", enabled=False)
+
+    summary = user_repository.dashboard_summary(since=datetime.now(timezone.utc) - timedelta(days=7))
+
+    assert summary.rider_total == 3
+    assert summary.rider_enabled == 2
+
+
+def test_dashboard_summary_counts_action_required_riders(user_repository) -> None:
+    _make_user(user_repository, "Healthy", health_state=HealthState.HEALTHY)
+    _make_user(user_repository, "Blocked", health_state=HealthState.ACTION_REQUIRED)
+    _make_user(user_repository, "AlsoBlocked", health_state=HealthState.ACTION_REQUIRED)
+
+    summary = user_repository.dashboard_summary(since=datetime.now(timezone.utc) - timedelta(days=7))
+
+    assert summary.action_required_count == 2
+
+
+def test_dashboard_summary_sums_imported_count_within_window_only(user_repository, sync_run_repository) -> None:
+    user = _make_user(user_repository, "Alex")
+    now = datetime.now(timezone.utc)
+
+    recent_run = sync_run_repository.start(user.id)
+    recent_run.started_at = now - timedelta(days=1)
+    sync_run_repository.finish(
+        recent_run.id, status=SyncRunStatus.SUCCESS, discovered=5, imported=5, skipped=0, failed=0
+    )
+
+    old_run = sync_run_repository.start(user.id)
+    old_run.started_at = now - timedelta(days=30)
+    sync_run_repository.finish(
+        old_run.id, status=SyncRunStatus.SUCCESS, discovered=3, imported=3, skipped=0, failed=0
+    )
+
+    summary = user_repository.dashboard_summary(since=now - timedelta(days=7))
+
+    assert summary.imported_recent == 5
+
+
+def test_dashboard_summary_computes_success_rate_from_finished_runs_in_window(
+    user_repository, sync_run_repository
+) -> None:
+    user = _make_user(user_repository, "Alex")
+    now = datetime.now(timezone.utc)
+
+    for status in (SyncRunStatus.SUCCESS, SyncRunStatus.PARTIAL, SyncRunStatus.FAILED, SyncRunStatus.FAILED):
+        run = sync_run_repository.start(user.id)
+        run.started_at = now - timedelta(hours=1)
+        sync_run_repository.finish(run.id, status=status, discovered=1, imported=0, skipped=0, failed=1)
+
+    summary = user_repository.dashboard_summary(since=now - timedelta(days=7))
+
+    assert summary.success_rate_recent == 50.0
+
+
+def test_dashboard_summary_success_rate_is_none_without_finished_runs_in_window(user_repository) -> None:
+    summary = user_repository.dashboard_summary(since=datetime.now(timezone.utc) - timedelta(days=7))
+
+    assert summary.success_rate_recent is None