Complete LnbitsAPI migration to dependency injection pattern

- Convert LnbitsAPI from singleton to BaseService extension
- Add LNBITS_API service token to DI container
- Register LnbitsAPI service in base module with proper initialization order
- Update AuthService to depend on injected LnbitsAPI instead of singleton
- Fix BaseService to properly track LnbitsAPI dependency in getMissingDependencies
- Update events API functions to use dependency injection
- Resolve initialization timing issue preventing application startup

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

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

src/core/base/BaseService.ts

@@ -48,6 +48,7 @@ export abstract class BaseService {
   protected storageService: any = null
   protected toastService: any = null
   protected invoiceService: any = null
+  protected lnbitsAPI: any = null
   
   // Service state
   public readonly isInitialized: Ref<boolean> = ref(false)
@@ -140,6 +141,7 @@ export abstract class BaseService {
         this.storageService = tryInjectService(SERVICE_TOKENS.STORAGE_SERVICE)
         this.toastService = tryInjectService(SERVICE_TOKENS.TOAST_SERVICE)
         this.invoiceService = tryInjectService(SERVICE_TOKENS.INVOICE_SERVICE)
+        this.lnbitsAPI = tryInjectService(SERVICE_TOKENS.LNBITS_API)
         
         // Check if all required dependencies are available
         const missingDeps = this.getMissingDependencies()
@@ -193,6 +195,9 @@ export abstract class BaseService {
     if (deps.includes('ToastService') && !this.toastService) {
       missing.push('ToastService')
     }
+    if (deps.includes('LnbitsAPI') && !this.lnbitsAPI) {
+      missing.push('LnbitsAPI')
+    }
     
     return missing
   }

src/core/di-container.ts

@@ -140,6 +140,9 @@ export const SERVICE_TOKENS = {
   
   // Nostrmarket services
   NOSTRMARKET_SERVICE: Symbol('nostrmarketService'),
+  
+  // API services
+  LNBITS_API: Symbol('lnbitsAPI'),
 } as const
 
 // Type-safe injection helpers