fix: resolve all linting issues

- Remove unused DebugBus import from App.tsx
- Remove unused NostrEvent import from relayListService.ts
- Add comment to empty catch block in ContentPanel.tsx
- Remove unused targetUrlsMap variable from relayManager.ts
- All linting errors resolved, TypeScript type checking passes

src/components/ContentPanel.tsx

@@ -581,6 +581,7 @@ const ContentPanel: React.FC<ContentPanelProps> = ({
               const naddr = nip19.naddrEncode({ kind: 30023, pubkey: currentArticle.pubkey, identifier: dTag })
               hasRead = hasRead || archiveController.isMarked(naddr)
             } catch (e) {
+              // Silently ignore encoding errors
             }
           }
         } else {