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/components/game/StatsTab/ElementStatsSection.tsx

@@ -48,7 +48,7 @@ export function ElementStatsSection({ store, elemMax }: ElementStatsSectionProps
           <div className="space-y-2">
             <div className="flex justify-between text-sm">
               <span className="text-gray-400">Unlocked Elements:</span>
-              <span className="text-green-300">{Object.values(store.elements).filter((e: any) => e.unlocked).length} / {Object.keys(ELEMENTS).length}</span>
+              <span className="text-green-300">{Object.values(store.elements || {}).filter((e: any) => e.unlocked).length} / {Object.keys(ELEMENTS).length}</span>
             </div>
             <div className="flex justify-between text-sm">
               <span className="text-gray-400">Elem. Crafting Bonus:</span>

src/components/game/StatsTab/LoopStatsSection.tsx

@@ -10,8 +10,8 @@ interface LoopStatsSectionProps {
 }
 
 export function LoopStatsSection({ store }: LoopStatsSectionProps) {
-  const spellsLearned = Object.values(store.spells as Record<string, { learned: boolean }>).filter((s) => s.learned).length;
-  const totalSkillLevels = Object.values(store.skills as Record<string, number>).reduce((a: number, b: number) => a + b, 0);
+  const spellsLearned = Object.values(store.spells || {}).filter((s) => s.learned).length;
+  const totalSkillLevels = Object.values(store.skills || {}).reduce((a: number, b: number) => a + b, 0);
 
   return (
     <Card className="bg-gray-900/80 border-gray-700">