Enhance Chat and Market Services with improved error handling and logging

Chat Service:
- Added detailed logging for API calls and responses, including warnings for missing authentication tokens and invalid response formats.
- Implemented a retry mechanism for message subscription setup on connection errors.
- Merged peers instead of clearing existing ones when loading from the API.

Market Service:
- Updated authentication checks to prioritize global auth state, improving user experience during order placement.
- Enhanced error messages for missing Nostr keys to guide users in configuring their profiles.

These changes improve the robustness and user-friendliness of the chat and market functionalities.

src/modules/market/services/nostrmarketService.ts

@@ -1,6 +1,7 @@
 import { finalizeEvent, type EventTemplate, nip04 } from 'nostr-tools'
 import { BaseService } from '@/core/base/BaseService'
 import type { Stall, Product, Order } from '@/stores/market'
+import { auth } from '@/composables/useAuth'
 
 export interface NostrmarketStall {
   id: string
@@ -106,15 +107,32 @@ export class NostrmarketService extends BaseService {
   }
 
   private getAuth() {
-    if (!this.authService?.isAuthenticated?.value || !this.authService?.user?.value?.prvkey) {
-      throw new Error('User not authenticated or private key not available')
+    // Check global auth first
+    if (!auth.isAuthenticated.value) {
+      throw new Error('User not authenticated')
     }
+
+    // Try to get keys from global auth first, fallback to injected auth service
+    const globalUser = auth.currentUser.value
+    const serviceUser = this.authService?.user?.value
     
-    const pubkey = this.authService.user.value.pubkey
-    const prvkey = this.authService.user.value.prvkey
+    const pubkey = globalUser?.pubkey || serviceUser?.pubkey
+    const prvkey = globalUser?.prvkey || serviceUser?.prvkey
     
     if (!pubkey || !prvkey) {
-      throw new Error('Public key or private key is missing')
+      this.debug('Auth check failed:', {
+        globalUser: {
+          exists: !!globalUser,
+          hasPubkey: !!globalUser?.pubkey,
+          hasPrvkey: !!globalUser?.prvkey
+        },
+        serviceUser: {
+          exists: !!serviceUser,
+          hasPubkey: !!serviceUser?.pubkey,
+          hasPrvkey: !!serviceUser?.prvkey
+        }
+      })
+      throw new Error('Nostr keys not available. Please ensure your Nostr identity is configured in your profile.')
     }
     
     // Validate that we have proper hex strings