feat: Refactor event fetching in NostrClient to use subscription method

- Replace the previous get() method with a subscription approach to retrieve multiple events from relays.
- Implement event collection with a timeout to ensure all stored events are fetched before closing the subscription.
- Adjust the format of collected events to match expected structure.

src/lib/nostr/client.ts

@@ -75,19 +75,25 @@ export class NostrClient {
     ]
 
     try {
-      // Get events from all relays using the working get() method
-      const noteEvents = await Promise.all(
-        this.relays.map(async (relay) => {
-          try {
-            const filter = filters[0]
-            const singleEvent = await this.pool.get([relay], filter)
-            return singleEvent ? [singleEvent] : []
-          } catch (error) {
-            console.warn(`Failed to fetch notes from relay ${relay}:`, error)
-            return []
-          }
-        })
-      )
+      // Use proper subscription method to get multiple events
+      const allEvents: Event[] = []
+      
+      const subscription = this.pool.subscribeMany(this.relays, filters, {
+        onevent(event: Event) {
+          allEvents.push(event)
+        },
+        oneose() {
+          // End of stored events - subscription is complete for initial fetch
+        }
+      })
+      
+      // Wait for events to be collected (give it time to get all stored events)
+      await new Promise(resolve => setTimeout(resolve, 2000))
+      
+      // Close the subscription since we just want the initial fetch
+      subscription.close()
+      
+      const noteEvents = [allEvents] // Wrap in array to match expected format
 
       // Flatten and deduplicate events by ID
       const uniqueNotes = Array.from(