feat: enhance PDF comparison with new change types and zoom functionality

- Added support for 'moved' and 'style-changed' change types in PDF comparison.
- Implemented category filters for changes, allowing users to filter by text, images, headers, annotations, formatting, and background.
- Introduced zoom functionality with buttons for zooming in, out, and resetting to default.
- Updated UI to reflect new change types and categories, including visual indicators for moved and style-changed items.
- Enhanced summary display to include counts for moved and style-changed changes.
- Refactored rendering logic to accommodate zoom levels and improve performance.
- Added tests for new change detection features and category assignments.

public/locales/da/tools.json

@@ -292,7 +292,47 @@
   },
   "comparePdfs": {
     "name": "Sammenlign PDF’er",
-    "subtitle": "Sammenlign to PDF’er side om side."
+    "subtitle": "Sammenlign to PDF’er side om side.",
+    "firstPdf": "Første PDF",
+    "secondPdf": "Anden PDF",
+    "clickOrDrop": "Klik eller slip",
+    "page": "Side",
+    "overlay": "Overlejring",
+    "sideBySide": "Side om side",
+    "flicker": "Blink",
+    "syncScroll": "Synkroniser rulning",
+    "export": "Eksportér",
+    "exportAsPdf": "Eksportér som PDF",
+    "splitView": "Opdelt visning",
+    "alternating": "Skiftevis",
+    "leftDocument": "Venstre dokument",
+    "rightDocument": "Højre dokument",
+    "original": "Original",
+    "modified": "Ændret",
+    "searchChanges": "Søg ændringer...",
+    "deleted": "Slettet",
+    "added": "Tilføjet",
+    "prevPage": "Forrige side",
+    "nextPage": "Næste side",
+    "prevChange": "Forrige ændring",
+    "nextChange": "Næste ændring",
+    "uploadTwoPdfs": "Upload to PDF’er for at se forskellene.",
+    "noDifferences": "Ingen forskelle fundet på denne side.",
+    "noMatchingChanges": "Ingen ændringer matcher det aktuelle filter.",
+    "pageNotExist": "Side {{page}} findes ikke i denne PDF.",
+    "noPairedPage": "Ingen parret side for denne side.",
+    "buildingModel": "Opbygger sideparringsmodel...",
+    "indexingPdf": "Indekserer PDF {{num}}, side {{page}} af {{total}}...",
+    "loadingComparison": "Indlæser sammenligning {{current}} af {{total}}...",
+    "runningOcr": "Kører OCR på side {{page}}...",
+    "preparingExport": "Forbereder PDF-eksport...",
+    "renderingPage": "Renderer side {{current}} af {{total}}...",
+    "exportError": "Eksportfejl",
+    "exportFailed": "Kunne ikke eksportere sammenlignings-PDF.",
+    "loadingFile": "Indlæser {{name}}...",
+    "invalidFile": "Ugyldig fil",
+    "invalidFileMsg": "Vælg venligst en gyldig PDF-fil.",
+    "loadError": "Kunne ikke indlæse PDF. Den kan være beskadiget eller beskyttet med adgangskode."
   },
   "posterizePdf": {
     "name": "Posterisér PDF",