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/onboarding/EquipmentStep.tsx

@@ -0,0 +1,102 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { api } from "@/lib/api";
+import { Card } from "@/components/ui/Card";
+import { Spinner } from "@/components/ui/Spinner";
+import type { Equipment } from "@/lib/types";
+
+interface EquipmentStepProps {
+  selectedIds: number[];
+  onChange: (ids: number[]) => void;
+}
+
+export function EquipmentStep({ selectedIds, onChange }: EquipmentStepProps) {
+  const [equipment, setEquipment] = useState<Equipment[]>([]);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    async function fetch() {
+      try {
+        const data = await api.getEquipment();
+        setEquipment(data);
+      } catch (err) {
+        console.error("Failed to fetch equipment:", err);
+      } finally {
+        setLoading(false);
+      }
+    }
+    fetch();
+  }, []);
+
+  const toggle = (id: number) => {
+    if (selectedIds.includes(id)) {
+      onChange(selectedIds.filter((i) => i !== id));
+    } else {
+      onChange([...selectedIds, id]);
+    }
+  };
+
+  // Group by category
+  const grouped = equipment.reduce<Record<string, Equipment[]>>(
+    (acc, item) => {
+      const cat = item.category || "Other";
+      if (!acc[cat]) acc[cat] = [];
+      acc[cat].push(item);
+      return acc;
+    },
+    {}
+  );
+
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center py-20">
+        <Spinner size="lg" />
+      </div>
+    );
+  }
+
+  return (
+    <div>
+      <h2 className="text-2xl font-bold text-zinc-100 mb-2">
+        What equipment do you have?
+      </h2>
+      <p className="text-zinc-400 mb-6">
+        Select all the equipment you have access to. This helps us build
+        workouts tailored to your setup.
+      </p>
+
+      {Object.entries(grouped).map(([category, items]) => (
+        <div key={category} className="mb-6">
+          <h3 className="text-sm font-semibold text-zinc-400 uppercase tracking-wider mb-3">
+            {category}
+          </h3>
+          <div className="grid grid-cols-2 md:grid-cols-3 gap-3">
+            {items.map((item) => {
+              const isSelected = selectedIds.includes(item.id);
+              return (
+                <Card
+                  key={item.id}
+                  onClick={() => toggle(item.id)}
+                  className={`p-4 text-center transition-all duration-150 ${
+                    isSelected
+                      ? "border-[#39FF14] bg-[rgba(57,255,20,0.1)]"
+                      : ""
+                  }`}
+                >
+                  <span
+                    className={`text-sm font-medium ${
+                      isSelected ? "text-accent" : "text-zinc-100"
+                    }`}
+                  >
+                    {item.name}
+                  </span>
+                </Card>
+              );
+            })}
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+}