Unraid deployment fixes and generator improvements

- Add Next.js rewrites to proxy API calls through same origin (fixes login/media on werkout.treytartt.com)
- Fix mediaUrl() in DayCard and ExerciseRow to use relative paths in production
- Add proxyTimeout for long-running workout generation endpoints
- Add CSRF trusted origin for treytartt.com
- Split docker-compose into production (Unraid) and dev configs
- Show display_name and descriptions on workout type cards
- Generator: rules engine improvements, movement enforcement, exercise selector updates
- Add new test files for rules drift, workout research generation

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

generator/tests/test_weekly_split.py

@@ -210,3 +210,42 @@ class TestWeeklySplit(TestCase):
 
         bad_pattern.delete()
         pref.delete()
+
+    @patch('generator.services.workout_generator.random.random', return_value=0.0)
+    def test_diversifies_repetitive_four_day_pattern(self, _mock_random):
+        """
+        A 4-day DB pattern with 3 lower-body days should be diversified so
+        split_type repetition does not dominate the week.
+        """
+        lower_a = MuscleGroupSplit.objects.create(
+            muscle_names=['glutes', 'hamstrings', 'core'],
+            label='Lower A',
+            split_type='lower',
+            frequency=9,
+        )
+        lower_b = MuscleGroupSplit.objects.create(
+            muscle_names=['quads', 'glutes', 'calves'],
+            label='Lower B',
+            split_type='lower',
+            frequency=9,
+        )
+        WeeklySplitPattern.objects.create(
+            days_per_week=4,
+            pattern=[self.lower.pk, lower_a.pk, lower_b.pk, self.full_body.pk],
+            pattern_labels=['Lower', 'Lower A', 'Lower B', 'Full Body'],
+            frequency=50,
+        )
+
+        pref = self._make_preference(days_per_week=4)
+        gen = self._make_generator(pref)
+
+        splits, _ = gen._pick_weekly_split()
+        self.assertEqual(len(splits), 4)
+
+        split_type_counts = Counter(s['split_type'] for s in splits)
+        self.assertLessEqual(
+            split_type_counts.get('lower', 0), 2,
+            f"Expected diversification to avoid 3+ lower days, got: {split_type_counts}",
+        )
+
+        pref.delete()