Remove legacy compatibility layer and enforce modular architecture

- Delete src/stores/market.ts compatibility re-export file
- Update 15 files to import from proper module path @/modules/market/stores/market
- Add necessary type exports to market store for external consumers
- Remove empty src/stores/ directory completely
- Enforce clean modular architecture without global store shortcuts

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/modules/market/stores/market.ts

@@ -12,7 +12,13 @@ import type {
   OrderStatus, StallCart, FilterData, SortOptions,
   PaymentRequest, PaymentStatus
 } from '../types/market'
-// Import types that are used in the store implementation
+
+// Re-export types for external use
+export type {
+  Market, Stall, Product, Order, ShippingZone,
+  OrderStatus, StallCart, FilterData, SortOptions,
+  PaymentRequest, PaymentStatus
+} from '../types/market'
 
 export const useMarketStore = defineStore('market', () => {
   const auth = useAuth()