fix: remaining tab migrations to modular stores

- CraftingProgress, ManaDisplay, TimeDisplay: fmt/fmtDec imports → @/lib/game/stores
- SkillsTab, SkillRow, SkillUpgradeDialog: imports → @/lib/game/stores
- StatsTab and sub-components: fmt/fmtDec imports → @/lib/game/stores
- CategorySkillsList: GameStore type import → GameCoordinatorStore
- EnchantmentDesigner types/utils: GameStore type imports → GameCoordinatorStore
- Header: fmt import → @/lib/game/stores

Moves remaining non-hook usage files from legacy @/lib/game/store to modular @/lib/game/stores

src/components/game/StatsTab/CombatStatsSection.tsx

@@ -2,8 +2,8 @@
 
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Swords } from 'lucide-react';
-import type { GameStore } from '@/lib/game/store';
-import { fmt, fmtDec } from '@/lib/game/store';
+import type { GameStore } from '@/lib/game/stores';
+import { fmt, fmtDec } from '@/lib/game/stores';
 import { getUnifiedEffects } from '@/lib/game/effects';
 
 interface CombatStatsSectionProps {

src/components/game/StatsTab/ElementStatsSection.tsx

@@ -5,7 +5,7 @@ import { Separator } from '@/components/ui/separator';
 import { FlaskConical } from 'lucide-react';
 import { ELEMENTS } from '@/lib/game/constants';
 import { getTierMultiplier } from '@/lib/game/skill-evolution';
-import { fmt, fmtDec } from '@/lib/game/store';
+import { fmt, fmtDec } from '@/lib/game/stores';
 
 interface ElementStatsSectionProps {
   store: any;

src/components/game/StatsTab/LoopStatsSection.tsx

@@ -3,7 +3,7 @@
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Separator } from '@/components/ui/separator';
 import { RotateCcw } from 'lucide-react';
-import { fmt } from '@/lib/game/store';
+import { fmt } from '@/lib/game/stores';
 
 interface LoopStatsSectionProps {
   store: any;

src/components/game/StatsTab/ManaStatsSection.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { fmt, fmtDec } from '@/lib/game/store';
+import { fmt, fmtDec } from '@/lib/game/stores';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Droplet } from 'lucide-react';
 import type { SkillUpgradeChoice } from '@/lib/game/types';

src/components/game/StatsTab/PactStatusSection.tsx

@@ -2,7 +2,7 @@
 
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Trophy } from 'lucide-react';
-import { fmtDec } from '@/lib/game/store';
+import { fmtDec } from '@/lib/game/stores';
 import { ELEMENTS } from '@/lib/game/constants';
 
 interface PactStatusSectionProps {

src/components/game/StatsTab/StudyStatsSection.tsx

@@ -2,7 +2,7 @@
 
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { BookOpen } from 'lucide-react';
-import { fmtDec } from '@/lib/game/store';
+import { fmtDec } from '@/lib/game/stores';
 
 interface StudyStatsSectionProps {
   studySpeedMult: number;