fix: code review cleanup

- Fixed TypeScript error: object possibly undefined in useGraphData.ts
- Removed console.error and console.warn statements
- Replaced all 'any' types with proper interface types
- Added proper type definitions for API DTOs (EntryDto, CreateEntryDto, UpdateEntryDto, etc.)
- Improved type safety across mindmap integration components

apps/web/src/components/mindmap/MindmapViewer.tsx

@@ -101,7 +101,8 @@ export function MindmapViewer({
         const results = await searchNodes(query);
         setSearchResults(results);
       } catch (err) {
-        console.error('Search failed:', err);
+        // Search failed - results will remain empty
+        setSearchResults([]);
       } finally {
         setIsSearching(false);
       }