feat: rewrite fabricator e2e test with debug bridge for store access

- Rewrite e2e/fabricator-happy-path.spec.ts from scratch:
  craft 8 gear pieces (1 per slot) via Fabricator UI,
  equip all via store bridge, verify equipment effects
- Add debugBridge.ts: exposes Zustand stores on window.__TEST__
  so Playwright can call store actions via page.evaluate()
- Import debugBridge in page.tsx as side-effect
- Uses Debug tab UI for attunement/element unlocking
- Uses store bridge for discipline XP, mana capacity, materials,
  recipe unlocking, and equipment slot assignment
- Test passes in ~3.5 minutes (155s craft time + setup)

src/lib/game/stores/debugBridge.ts

@@ -0,0 +1,26 @@
+// ─── Debug Bridge for E2E Testing ──────────────────────────────────────────────
+// Exposes Zustand stores on window.__TEST__ so Playwright can call
+// store actions via page.evaluate().  This file is a side-effect import;
+// it runs once at module load time.
+
+import { useGameStore } from './gameStore';
+import { useManaStore } from './manaStore';
+import { useCombatStore } from './combatStore';
+import { useCraftingStore } from './craftingStore';
+import { useAttunementStore } from './attunementStore';
+import { usePrestigeStore } from './prestigeStore';
+import { useDisciplineStore } from './discipline-slice';
+import { useUIStore } from './uiStore';
+
+if (typeof window !== 'undefined') {
+  (window as any).__TEST__ = {
+    useGameStore,
+    useManaStore,
+    useCombatStore,
+    useCraftingStore,
+    useAttunementStore,
+    usePrestigeStore,
+    useDisciplineStore,
+    useUIStore,
+  };
+}