refactor: auto-generate subscription ID in useReqTimelineEnhanced

Remove the manual `id` parameter from useReqTimelineEnhanced and generate it
automatically from the filter, relays, and stream option. This prevents bugs
where the ID doesn't match the actual query parameters.

Benefits:
- Simpler API - one less parameter to pass
- Impossible to create ID/filter mismatches
- ID always perfectly reflects what's being queried
- More maintainable and less error-prone

The subscription ID is now generated as:
`req-${JSON.stringify(filters)}-${relays.join(",")}-${stream}`

This ensures the subscription re-triggers when any of these values change,
which is exactly when we want to re-subscribe.

Updated call site in ReqViewer.tsx to use the new API.

src/components/ReqViewer.tsx

@@ -760,12 +760,10 @@ export default function ReqViewer({
     eoseReceived,
     relayStates: reqRelayStates,
     overallState,
-  } = useReqTimelineEnhanced(
-    `req-${JSON.stringify(resolvedFilter)}-${closeOnEose}`,
-    resolvedFilter,
-    normalizedRelays,
-    { limit: resolvedFilter.limit || 50, stream },
-  );
+  } = useReqTimelineEnhanced(resolvedFilter, normalizedRelays, {
+    limit: resolvedFilter.limit || 50,
+    stream,
+  });
 
   const [showQuery, setShowQuery] = useState(false);
   const [showExportDialog, setShowExportDialog] = useState(false);

src/hooks/useReqTimelineEnhanced.ts

@@ -36,14 +36,13 @@ interface UseReqTimelineEnhancedReturn {
  * - Syncs connection state from RelayStateManager
  * - Tracks events per relay via event._relay metadata
  * - Derives overall state from individual relay states
+ * - Generates subscription ID automatically from filters, relays, and options
  *
- * @param id - Unique identifier for this timeline (for caching)
  * @param filters - Nostr filter(s)
  * @param relays - Array of relay URLs
  * @param options - Stream mode, limit, etc.
  */
 export function useReqTimelineEnhanced(
-  id: string,
   filters: Filter | Filter[],
   relays: string[],
   options: UseReqTimelineEnhancedOptions = { limit: 50 },
@@ -85,6 +84,12 @@ export function useReqTimelineEnhanced(
   const stableFilters = useStableValue(filters);
   const stableRelays = useStableArray(relays);
 
+  // Generate stable subscription ID from parameters
+  // This ensures re-subscription when filters, relays, or stream mode changes
+  const subscriptionId = useMemo(() => {
+    return `req-${JSON.stringify(stableFilters)}-${stableRelays.join(",")}-${stream}`;
+  }, [stableFilters, stableRelays, stream]);
+
   // Initialize relay states when relays change
   useEffect(() => {
     queryStartedAt.current = Date.now();
@@ -317,7 +322,7 @@ export function useReqTimelineEnhanced(
     return () => {
       subscriptions.forEach((sub) => sub.unsubscribe());
     };
-  }, [id, stableFilters, stableRelays, limit, stream, eventStore]);
+  }, [subscriptionId, limit, eventStore]);
 
   // Derive overall state from individual relay states
   const overallState = useMemo(() => {