Refactor large files into modular components

- Refactored page.tsx (613→252 lines) with GameOverScreen and LeftPanel extracted
- Refactored StatsTab.tsx (584→92 lines) with section components
- Refactored SkillsTab.tsx (434→54 lines) with sub-components
- Created modular structure for GameContext, LootInventory, and other components
- All extracted components organized into feature directories

src/lib/game/crafting-actions/application-actions.ts

@@ -0,0 +1,72 @@
+// ─── Enchantment Application Actions ────────────────────────────────────────
+
+import type { GameState } from '../types';
+import * as CraftingApply from '../crafting-apply';
+
+export function startApplying(
+  equipmentInstanceId: string,
+  designId: string,
+  get: () => GameState,
+  set: (fn: (state: GameState) => Partial<GameState>) => void
+): boolean {
+  const state = get();
+  const instance = state.equipmentInstances[equipmentInstanceId];
+  const design = state.enchantmentDesigns.find(d => d.id === designId);
+
+  const validation = CraftingApply.canApplyEnchantment(
+    instance,
+    design,
+    state.currentAction
+  );
+  if (!validation.canApply) return false;
+
+  set(() => ({
+    currentAction: 'enchant' as const,
+    applicationProgress: CraftingApply.initializeApplicationProgress(
+      equipmentInstanceId,
+      designId,
+      design!
+    ),
+  }));
+
+  return true;
+}
+
+export function pauseApplication(
+  get: () => GameState,
+  set: (fn: (state: GameState) => Partial<GameState>) => void
+) {
+  set((state) => {
+    if (!state.applicationProgress) return {};
+    return {
+      applicationProgress: {
+        ...state.applicationProgress,
+        paused: true,
+      },
+    };
+  });
+}
+
+export function resumeApplication(
+  get: () => GameState,
+  set: (fn: (state: GameState) => Partial<GameState>) => void
+) {
+  set((state) => {
+    if (!state.applicationProgress) return {};
+    return {
+      applicationProgress: {
+        ...state.applicationProgress,
+        paused: false,
+      },
+    };
+  });
+}
+
+export function cancelApplication(
+  set: (fn: (state: GameState) => Partial<GameState>) => void
+) {
+  set(() => ({
+    currentAction: 'meditate' as const,
+    applicationProgress: null,
+  }));
+}