1.3.6 Toast Notification Pattern: Add centralized ToastService abstraction

- Create ToastService extending BaseService with context-specific toast methods
- Add useToast composable for convenient dependency injection access
- Provide standardized toast patterns: auth, payment, clipboard, operations
- Include async operation support with automatic loading/success/error states
- Integrate with DI container and base module for automatic initialization
- Demonstrate refactoring in LoginDialog.vue with context-specific methods
- Eliminate duplicate vue-sonner imports across 20+ files for better maintainability
- Support custom ToastOptions interface with full TypeScript compatibility

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

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

src/modules/base/index.ts

@@ -13,6 +13,7 @@ import { pwaService } from './pwa/pwa-service'
 import { paymentService } from '@/core/services/PaymentService'
 import { visibilityService } from '@/core/services/VisibilityService'
 import { storageService } from '@/core/services/StorageService'
+import { toastService } from '@/core/services/ToastService'
 
 /**
  * Base Module Plugin
@@ -40,6 +41,9 @@ export const baseModule: ModulePlugin = {
     // Register storage service
     container.provide(SERVICE_TOKENS.STORAGE_SERVICE, storageService)
     
+    // Register toast service
+    container.provide(SERVICE_TOKENS.TOAST_SERVICE, toastService)
+    
     // Register PWA service
     container.provide('pwaService', pwaService)
 
@@ -62,6 +66,10 @@ export const baseModule: ModulePlugin = {
       waitForDependencies: true, // StorageService depends on AuthService
       maxRetries: 3
     })
+    await toastService.initialize({
+      waitForDependencies: false, // ToastService has no dependencies
+      maxRetries: 1
+    })
     
     console.log('✅ Base module installed successfully')
   },
@@ -75,6 +83,7 @@ export const baseModule: ModulePlugin = {
     await paymentService.dispose()
     await visibilityService.dispose()
     await storageService.dispose()
+    await toastService.dispose()
     
     console.log('✅ Base module uninstalled')
   },
@@ -85,6 +94,7 @@ export const baseModule: ModulePlugin = {
     paymentService,
     visibilityService,
     storageService,
+    toastService,
     pwaService
   },