Feature/v2/filewithid implementation (#4369)

Added Filewithid type
Updated code where file was being used to use filewithid
Updated places we identified files by name or composite keys to use UUID
Updated places we should have been using quickkey
Updated pageeditor issue where we parsed pagenumber from pageid instead
of using pagenumber directly

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Co-authored-by: Copilot <[email protected]>
Co-authored-by: James Brunton <[email protected]>

frontend/src/hooks/useThumbnailGeneration.ts

@@ -1,5 +1,6 @@
 import { useCallback, useRef } from 'react';
 import { thumbnailGenerationService } from '../services/thumbnailGenerationService';
+import { createQuickKey } from '../types/fileContext';
 import { FileId } from '../types/file';
 
 // Request queue to handle concurrent thumbnail requests
@@ -71,8 +72,8 @@ async function processRequestQueue() {
 
           console.log(`📸 Batch generating ${requests.length} thumbnails for pages: ${pageNumbers.slice(0, 5).join(', ')}${pageNumbers.length > 5 ? '...' : ''}`);
 
-          // Use file name as fileId for PDF document caching
-          const fileId = file.name + '_' + file.size + '_' + file.lastModified as FileId;
+          // Use quickKey for PDF document caching (same metadata, consistent format)
+          const fileId = createQuickKey(file) as FileId;
 
           const results = await thumbnailGenerationService.generateThumbnails(
             fileId,