Fix ESLint errors

src/components/admin/MarkdownEditor.tsx

@@ -54,7 +54,7 @@ export function MarkdownEditor({
   autoSave = false,
   height = 600,
   placeholder = 'Write your content in markdown...'
-}: MarkdownEditorProps) {
+}: MarkdownEditorProps): React.JSX.Element {
   const { theme } = useTheme();
   const [mounted, setMounted] = useState(false);
   const [resolvedTheme, setResolvedTheme] = useState<'light' | 'dark'>('light');
@@ -66,7 +66,7 @@ export function MarkdownEditor({
       const isDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
       setResolvedTheme(isDark ? 'dark' : 'light');
     } else {
-      setResolvedTheme(theme as 'light' | 'dark');
+      setResolvedTheme(theme);
     }
   }, [theme]);
 
@@ -75,7 +75,7 @@ export function MarkdownEditor({
     if (theme !== 'system') return;
 
     const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
-    const handler = (e: MediaQueryListEvent) => {
+    const handler = (e: MediaQueryListEvent): void => {
       setResolvedTheme(e.matches ? 'dark' : 'light');
     };
 
@@ -108,7 +108,7 @@ export function MarkdownEditor({
     );
   }
 
-  const getLastSavedText = () => {
+  const getLastSavedText = (): string | null => {
     if (!lastSaved) return null;
     const seconds = Math.floor((Date.now() - lastSaved.getTime()) / 1000);
     if (seconds < 60) return `Saved ${seconds}s ago`;
@@ -138,7 +138,7 @@ export function MarkdownEditor({
             linkPlugin(),
             linkDialogPlugin(),
             imagePlugin({
-              imageUploadHandler: async (file: File) => {
+              imageUploadHandler: async (file: File): Promise<string> => {
                 try {
                   const formData = new FormData();
                   formData.append('file', file);
@@ -152,7 +152,7 @@ export function MarkdownEditor({
                   if (error) throw error;
                   
                   // Return CloudFlare imagedelivery.net URL
-                  const imageUrl = getCloudflareImageUrl(data.id, 'public');
+                  const imageUrl = getCloudflareImageUrl((data as { id: string }).id, 'public');
                   if (!imageUrl) throw new Error('Failed to generate image URL');
                   
                   return imageUrl;