feat: Rename ocr-text asset type to text-content across the application

frontend/src/preview/DocumentViewerPanel.tsx

@@ -135,7 +135,7 @@ const DocumentViewerPanel: React.FC<DocumentViewerPanelProps> = ({
     if (!document || !getDocumentAsset) {
       return false;
     }
-    return Boolean(getDocumentAsset(document, 'ocr-text'));
+    return Boolean(getDocumentAsset(document, 'text-content'));
   }, [document, getDocumentAsset]);
 
   const navigateToFolder = useCallback(
@@ -183,12 +183,12 @@ const DocumentViewerPanel: React.FC<DocumentViewerPanelProps> = ({
     }
 
     const updateUrl = () =>
-      resolveDocumentAssetUrl(document, 'ocr-text', {
+      resolveDocumentAssetUrl(document, 'text-content', {
         ensureAssetUrl,
         getAsset: getDocumentAsset,
       });
 
-    const asset = getDocumentAsset(document, 'ocr-text');
+    const asset = getDocumentAsset(document, 'text-content');
     let url = updateUrl();
 
     if (!url && document.id && asset?.id && ensureAssetUrl) {
@@ -223,10 +223,10 @@ const DocumentViewerPanel: React.FC<DocumentViewerPanelProps> = ({
       id: 'content',
       label: 'Content',
       loadContent: loadOcrContent,
-      loadingMessage: 'Loading OCR content…',
-      emptyMessage: 'No OCR content available.',
-      unavailableMessage: 'No OCR content available.',
-      errorMessage: 'Failed to load OCR content.',
+      loadingMessage: 'Loading text content…',
+      emptyMessage: 'No text content available.',
+      unavailableMessage: 'No text content available.',
+      errorMessage: 'Failed to load text content.',
     }),
     [hasOcr, loadOcrContent],
   );
@@ -282,7 +282,7 @@ const DocumentViewerPanel: React.FC<DocumentViewerPanelProps> = ({
           ensureAssetUrl,
           getDocumentAsset,
           notifyApiError,
-          ocrErrorMessage: 'Unable to open OCR text.',
+          ocrErrorMessage: 'Unable to open text content.',
         })
         : null,
     [