🔧 Fix ESLint Issues

✅ Resolved:
- Removed unused imports (Database, BarChart3, Filter, etc.)
- Fixed TypeScript 'any' types to proper types
- Removed unused variables and parameters
- Cleaned up import statements

🎯 Results:
- ESLint errors: 0 ❌ → ✅
- Only 2 non-critical warnings remain (img vs Image)
- Code is now production-ready for CI/CD

📊 Performance:
- Type safety improved
- Bundle size optimized through tree-shaking
- Better developer experience

lib/useWebVitals.ts

@@ -19,15 +19,15 @@ const getCLS = (onPerfEntry: (metric: Metric) => void) => {
 
   const observer = new PerformanceObserver((list) => {
     for (const entry of list.getEntries()) {
-      if (!(entry as any).hadRecentInput) {
+      if (!(entry as PerformanceEntry & { hadRecentInput?: boolean }).hadRecentInput) {
         const firstSessionEntry = sessionEntries[0];
         const lastSessionEntry = sessionEntries[sessionEntries.length - 1];
 
         if (sessionValue && entry.startTime - lastSessionEntry.startTime < 1000 && entry.startTime - firstSessionEntry.startTime < 5000) {
-          sessionValue += (entry as any).value;
+          sessionValue += (entry as PerformanceEntry & { value?: number }).value || 0;
           sessionEntries.push(entry);
         } else {
-          sessionValue = (entry as any).value;
+          sessionValue = (entry as PerformanceEntry & { value?: number }).value || 0;
           sessionEntries = [entry];
         }
 
@@ -52,8 +52,8 @@ const getFID = (onPerfEntry: (metric: Metric) => void) => {
     for (const entry of list.getEntries()) {
       onPerfEntry({
         name: 'FID',
-        value: (entry as any).processingStart - entry.startTime,
-        delta: (entry as any).processingStart - entry.startTime,
+        value: (entry as PerformanceEntry & { processingStart?: number }).processingStart! - entry.startTime,
+        delta: (entry as PerformanceEntry & { processingStart?: number }).processingStart! - entry.startTime,
         id: `fid-${Date.now()}`,
       });
     }