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/plans/PlanCard.tsx

@@ -0,0 +1,50 @@
+import Link from "next/link";
+import { Card } from "@/components/ui/Card";
+import { Badge } from "@/components/ui/Badge";
+import type { GeneratedWeeklyPlan } from "@/lib/types";
+
+interface PlanCardProps {
+  plan: GeneratedWeeklyPlan;
+}
+
+function formatDate(dateStr: string): string {
+  const date = new Date(dateStr + "T00:00:00");
+  return date.toLocaleDateString("en-US", { month: "short", day: "numeric" });
+}
+
+function getStatusVariant(
+  status: string
+): "success" | "warning" | "error" | "default" {
+  switch (status) {
+    case "completed":
+      return "success";
+    case "pending":
+      return "warning";
+    case "failed":
+      return "error";
+    default:
+      return "default";
+  }
+}
+
+export function PlanCard({ plan }: PlanCardProps) {
+  const workoutDays = plan.generated_workouts.filter((w) => !w.is_rest_day);
+  const dateRange = `${formatDate(plan.week_start_date)} - ${formatDate(plan.week_end_date)}`;
+
+  return (
+    <Link href={`/plans/${plan.id}`} className="block">
+      <Card className="p-4 hover:bg-zinc-800/50 transition-colors duration-150">
+        <div className="flex items-center justify-between mb-2">
+          <h3 className="text-sm font-semibold text-zinc-100">{dateRange}</h3>
+          <Badge variant={getStatusVariant(plan.status)}>
+            {plan.status}
+          </Badge>
+        </div>
+        <div className="flex items-center gap-4 text-xs text-zinc-400">
+          <span>{workoutDays.length} workout{workoutDays.length !== 1 ? "s" : ""}</span>
+          <span>{plan.generation_time_ms}ms</span>
+        </div>
+      </Card>
+    </Link>
+  );
+}