Remove LEGACY Nostr client services and related components to streamline the codebase

- Delete Nostr client hub and associated files, including the Nostr store, to eliminate unused functionality.
- Update service tokens and dependency injections to reflect the removal of Nostr client services.
- Adjust notification settings in NotificationSettings.vue to prepare for future implementation of notifications.

src/core/base/BaseService.ts

@@ -44,7 +44,6 @@ export abstract class BaseService {
   // Core dependencies with proper typing
   protected relayHub: any = null
   protected authService: any = null
-  protected nostrClientHub: any = null
   protected visibilityService: any = null
   
   // Service state
@@ -134,7 +133,6 @@ export abstract class BaseService {
         // Try to inject core dependencies
         this.relayHub = tryInjectService(SERVICE_TOKENS.RELAY_HUB)
         this.authService = tryInjectService(SERVICE_TOKENS.AUTH_SERVICE)
-        this.nostrClientHub = tryInjectService(SERVICE_TOKENS.NOSTR_CLIENT_HUB)
         this.visibilityService = tryInjectService(SERVICE_TOKENS.VISIBILITY_SERVICE)
         
         // Check if all required dependencies are available
@@ -180,9 +178,6 @@ export abstract class BaseService {
     if (deps.includes('AuthService') && !this.authService) {
       missing.push('AuthService')
     }
-    if (deps.includes('NostrClientHub') && !this.nostrClientHub) {
-      missing.push('NostrClientHub')
-    }
     if (deps.includes('VisibilityService') && !this.visibilityService) {
       missing.push('VisibilityService')
     }
@@ -269,7 +264,6 @@ export abstract class BaseService {
       this.isInitialized.value = false
       this.relayHub = null
       this.authService = null
-      this.nostrClientHub = null
       
       console.log(`♻️ ${this.metadata.name} disposed`)
       

src/core/di-container.ts

@@ -109,7 +109,6 @@ export const SERVICE_TOKENS = {
   
   // Nostr services  
   RELAY_HUB: Symbol('relayHub'),
-  NOSTR_CLIENT_HUB: Symbol('nostrClientHub'),
   
   // Auth services
   AUTH_SERVICE: Symbol('authService'),