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/views/CheckoutPage.vue

@@ -272,6 +272,7 @@ import { ref, computed, onMounted } from 'vue'
 import { useRoute } from 'vue-router'
 import { useMarketStore } from '@/stores/market'
 import { injectService, SERVICE_TOKENS } from '@/core/di-container'
+import { auth } from '@/composables/useAuth'
 import { 
   Card, 
   CardHeader, 
@@ -411,21 +412,23 @@ const placeOrder = async () => {
     }
     // Debug logging to understand auth state
     console.log('Auth check:', {
-      isAuthenticated: authService.isAuthenticated.value,
-      user: authService.user.value,
+      isAuthenticated: auth.isAuthenticated.value,
+      user: auth.currentUser.value,
+      userPubkey: auth.currentUser.value?.pubkey,
+      authServiceUser: authService.user.value,
       hasPubkey: !!authService.user.value?.pubkey,
       nostrPubkey: authService.user.value?.pubkey
     })
     
-    // Get pubkey from auth service
-    const userPubkey = authService.user.value?.pubkey
+    // Try to get pubkey from main auth first, fallback to auth service
+    const userPubkey = auth.currentUser.value?.pubkey || authService.user.value?.pubkey
     
-    if (!authService.isAuthenticated.value) {
+    if (!auth.isAuthenticated.value) {
       throw new Error('You must be logged in to place an order')
     }
     
     if (!userPubkey) {
-      throw new Error('No Nostr public key found. Please ensure your Nostr identity is configured.')
+      throw new Error('Nostr identity required: Please configure your Nostr public key in your profile settings to place orders.')
     }
 
     // Create the order using the market store's order placement functionality