feat: add Phase 5 Progression & Analytics — smart suggestions, dashboard, schedule

Add auto-progression engine (ProgressionService) with rep increase, weight
increase, deload, and felt-easy acceleration rules. Add AnalyticsService for
user stats, exercise progress charts, and volume-by-day data. New dashboard
and schedule routes with Chart.js visualizations. Progression badges shown
inline on workout day view. Navigation updated with Dashboard and Schedule links.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_analytics_service.py

@@ -0,0 +1,96 @@
+"""Tests for the AnalyticsService class."""
+
+from datetime import date, timedelta
+
+from sqlmodel import SQLModel, Session, create_engine
+
+from app.models.user import User
+from app.models.exercise import Exercise
+from app.models.workout_day import WorkoutDay
+from app.models.workout_session import WorkoutSession
+from app.models.workout_log import WorkoutLog
+from app.services.analytics_service import AnalyticsService
+
+
+class TestAnalyticsService:
+    """Tests for analytics data aggregation."""
+
+    def _setup(self):
+        """Create DB with sessions and logs for analytics."""
+        engine = create_engine("sqlite:///:memory:")
+        SQLModel.metadata.create_all(engine)
+        session = Session(engine)
+
+        user = User(username="phil", password_hash="h", display_name="Phillip")
+        day = WorkoutDay(name="Push", day_number=1, description="Push day")
+        exercise = Exercise(
+            name="DB Chest Press", muscle_group="Chest",
+            workout_day="Push", sets=3, tempo="3-1-2", form_cues="...",
+        )
+        session.add_all([user, day, exercise])
+        session.commit()
+        session.refresh(user)
+        session.refresh(day)
+        session.refresh(exercise)
+
+        # Create 3 sessions over 3 weeks
+        for week in range(3):
+            ws = WorkoutSession(
+                user_id=user.id, workout_day_id=day.id,
+                date=date.today() - timedelta(days=(2 - week) * 7),
+            )
+            session.add(ws)
+            session.commit()
+            session.refresh(ws)
+
+            for set_num in range(1, 4):
+                session.add(WorkoutLog(
+                    session_id=ws.id, exercise_id=exercise.id,
+                    set_number=set_num,
+                    reps_completed=8 + week,
+                    weight_used="30 lbs",
+                    felt_easy=(week == 2),
+                ))
+            session.commit()
+
+        service = AnalyticsService(session)
+        return session, service, user, exercise
+
+    def test_get_total_sessions(self) -> None:
+        """Should return the total number of sessions for a user."""
+        session, service, user, exercise = self._setup()
+        stats = service.get_user_stats(user.id)
+        assert stats["total_sessions"] == 3
+        session.close()
+
+    def test_get_total_volume(self) -> None:
+        """Should calculate total volume (sets x reps x weight)."""
+        session, service, user, exercise = self._setup()
+        stats = service.get_user_stats(user.id)
+        assert stats["total_volume"] > 0
+        session.close()
+
+    def test_get_workout_streak(self) -> None:
+        """Should calculate consecutive workout weeks."""
+        session, service, user, exercise = self._setup()
+        stats = service.get_user_stats(user.id)
+        assert stats["current_streak"] >= 1
+        session.close()
+
+    def test_get_exercise_progress_data(self) -> None:
+        """Should return chart-ready data for an exercise."""
+        session, service, user, exercise = self._setup()
+        data = service.get_exercise_progress(user.id, exercise.id)
+        assert "dates" in data
+        assert "reps" in data
+        assert "weights" in data
+        assert len(data["dates"]) == 3
+        session.close()
+
+    def test_get_volume_by_day(self) -> None:
+        """Should return volume per workout day for charts."""
+        session, service, user, exercise = self._setup()
+        data = service.get_volume_by_day(user.id)
+        assert "Push" in data
+        assert data["Push"] > 0
+        session.close()