feat: translate all pages, UI messages and docs and fix SEO redirects and indexing

src/js/utils/pdf-operations.ts

@@ -1,6 +1,8 @@
 import { PDFDocument, degrees, rgb, StandardFonts, PageSizes } from 'pdf-lib';
 import { loadPdfDocument } from './load-pdf-document.js';
 
+import { trText } from '../i18n/i18n.js';
+
 export async function mergePdfs(
   pdfBytesList: Uint8Array[]
 ): Promise<Uint8Array> {
@@ -132,7 +134,8 @@ export async function deletePdfPages(
     }
   }
 
-  if (pagesToKeep.length === 0) throw new Error('Cannot delete all pages');
+  if (pagesToKeep.length === 0)
+    throw new Error(trText('Cannot delete all pages'));
 
   const newPdf = await PDFDocument.create();
   const copiedPages = await newPdf.copyPages(srcDoc, pagesToKeep);
@@ -280,7 +283,7 @@ export async function addTextWatermark(
 
   const canvas = document.createElement('canvas');
   const ctx = canvas.getContext('2d');
-  if (!ctx) throw new Error('Failed to create canvas context');
+  if (!ctx) throw new Error(trText('Failed to create canvas context'));
 
   const dpr = 2;
   const colorR = Math.round(options.color.r * 255);
@@ -301,7 +304,8 @@ export async function addTextWatermark(
 
   const blob = await new Promise<Blob>((resolve, reject) => {
     canvas.toBlob(
-      (b) => (b ? resolve(b) : reject(new Error('Canvas toBlob failed'))),
+      (b) =>
+        b ? resolve(b) : reject(new Error(trText('Canvas toBlob failed'))),
       'image/png'
     );
   });