workout generator audit: rules engine, structure rules, split patterns, injury UX, metadata cleanup

- Add rules_engine.py with quantitative rules for all 8 workout types
- Add quality gate retry loop in generate_single_workout()
- Expand calibrate_structure_rules to all 120 combinations (8 types × 5 goals × 3 sections)
- Wire WeeklySplitPattern DB records into _pick_weekly_split()
- Enforce movement patterns from WorkoutStructureRule in exercise selection
- Add straight-set strength support (single main lift, 4-6 rounds)
- Add modality consistency check for duration-dominant workout types
- Add InjuryStep component to onboarding and preferences
- Add sibling exercise exclusion in regenerate and preview_day endpoints
- Display generator warnings on dashboard
- Expand fix_rep_durations, fix_exercise_flags, fix_movement_pattern_typo
- Add audit_exercise_data and check_rules_drift management commands
- Add Next.js frontend with dashboard, onboarding, preferences, history pages
- Add generator app with ML-powered workout generation pipeline
- 96 new tests across 7 test modules

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

werkout-frontend/components/workout/ExerciseRow.tsx

@@ -0,0 +1,79 @@
+import Link from "next/link";
+import { Badge } from "@/components/ui/Badge";
+import type { SupersetExercise } from "@/lib/types";
+
+function mediaUrl(path: string): string {
+  if (typeof window === "undefined") return path;
+  return `${window.location.protocol}//${window.location.hostname}:8001${path}`;
+}
+
+interface ExerciseRowProps {
+  exercise: SupersetExercise;
+}
+
+export function ExerciseRow({ exercise }: ExerciseRowProps) {
+  const ex = exercise.exercise;
+
+  const details: string[] = [];
+  if (exercise.reps) {
+    details.push(`${exercise.reps} reps`);
+  }
+  if (exercise.duration) {
+    details.push(`${exercise.duration}s`);
+  }
+  if (exercise.weight) {
+    details.push(`${exercise.weight} lbs`);
+  }
+
+  const muscles = ex.muscles?.map((m) => m.name) || [];
+
+  return (
+    <div className="flex items-center justify-between px-4 py-3 border-b border-zinc-800/50 last:border-b-0">
+      <div className="flex-1 min-w-0">
+        <div className="flex items-center gap-2">
+          <span className="text-sm font-medium text-zinc-100 truncate">
+            {ex.name}
+          </span>
+          {ex.video_url && (
+            <Link
+              href={mediaUrl(ex.video_url)}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="flex-shrink-0 text-[#39FF14] hover:text-[#39FF14]/80 transition-colors"
+              title="Watch video"
+            >
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                width="16"
+                height="16"
+                viewBox="0 0 24 24"
+                fill="currentColor"
+                stroke="none"
+              >
+                <polygon points="5 3 19 12 5 21 5 3" />
+              </svg>
+            </Link>
+          )}
+        </div>
+
+        {details.length > 0 && (
+          <p className="text-xs text-zinc-400 mt-0.5">{details.join(" / ")}</p>
+        )}
+
+        {muscles.length > 0 && (
+          <div className="flex flex-wrap gap-1 mt-1.5">
+            {muscles.map((name) => (
+              <Badge
+                key={name}
+                variant="default"
+                className="text-[10px] px-1.5 py-0"
+              >
+                {name}
+              </Badge>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}