fix: Object.values null safety + Docker dev build

- Change Dockerfile to use development build (better error messages)
- Add || {} fallbacks to all Object.values() calls accessing state
- Fixes "Cannot convert undefined or null to object" browser error during SSR/hydration
- Verified TypeScript compilation and Next.js build successful

Files modified:
- Dockerfile
- src/app/page.tsx
- src/components/game/tabs/StatsTab.tsx
- src/components/game/StatsTab/LoopStatsSection.tsx
- src/components/game/StatsTab/ElementStatsSection.tsx
- src/components/game/tabs/AttunementsTab.tsx
- src/components/game/tabs/GolemancyTab.tsx
- src/lib/game/effects.ts
- src/lib/game/utils/combat-utils.ts
- src/lib/game/crafting-loot.ts
- src/components/game/LootInventory/LootInventoryDisplay.tsx
- src/components/game/LootInventory/index.tsx
- src/components/game/crafting/EnchantmentDesigner/utils.ts

src/lib/game/effects.ts

@@ -35,7 +35,7 @@ export function computeEquipmentEffects(
   const specials = new Set<string>();
 
   // Iterate through all equipped items
-  for (const instanceId of Object.values(equippedInstances)) {
+  for (const instanceId of Object.values(equippedInstances || {})) {
     if (!instanceId) continue;
     const instance = equipmentInstances[instanceId];
     if (!instance) continue;
@@ -172,8 +172,8 @@ export function getUnifiedEffects(state: Pick<GameState, 'skillUpgrades' | 'skil
   return computeAllEffects(
     state.skillUpgrades || {},
     state.skillTiers || {},
-    state.equipmentInstances,
-    state.equippedInstances
+    state.equipmentInstances || {},
+    state.equippedInstances || {}
   );
 }