fix(invoices): render invoice PDF with html-to-image for correct Persian

html2canvas re-implements text layout and mangled Persian RTL output (joined
words, broken spacing, reordered emails). Switch the rasterizer to html-to-image,
which renders through an SVG foreignObject using the browser's native text
engine, so Persian shaping/spacing/bidi and oklch() colors all come out right.
Peyda is embedded as base64 @font-face via fontEmbedCSS so html-to-image skips
its slow document-wide font scan. Drop the now-unused html2canvas dependency.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/package-lock.json

@@ -15,7 +15,7 @@
         "axios": "^1.17.0",
         "clsx": "^2.1.0",
         "framer-motion": "^12.40.0",
-        "html2canvas": "^1.4.1",
+        "html-to-image": "^1.11.13",
         "jspdf": "^4.2.1",
         "lenis": "^1.3.23",
         "lucide-react": "^1.18.0",
@@ -2829,6 +2829,7 @@
       "resolved": "https://registry.npmmirror.com/base64-arraybuffer/-/base64-arraybuffer-1.0.2.tgz",
       "integrity": "sha512-I3yl4r9QB5ZRY3XuJVEPfc2XhZO6YweFPI+UovAzn+8/hb3oJ6lnysaFcjVpkCPfVWFUDvoZ8kmVDP7WyRtYtQ==",
       "license": "MIT",
+      "optional": true,
       "engines": {
         "node": ">= 0.6.0"
       }
@@ -3196,6 +3197,7 @@
       "resolved": "https://registry.npmmirror.com/css-line-break/-/css-line-break-2.1.0.tgz",
       "integrity": "sha512-FHcKFCZcAha3LwfVBhCQbW2nCNbkZXn7KVUJcsT5/P8YmfsVja0FMPJr0B903j/E69HUphKiV9iQArX8SDYA4w==",
       "license": "MIT",
+      "optional": true,
       "dependencies": {
         "utrie": "^1.0.2"
       }
@@ -4564,11 +4566,18 @@
       "integrity": "sha512-VSIRpLfRwlAAdGL4wiTucx2ScRipo0ed1FBatWkyt832jC4CReKstga6yIhYVwGu9LOBjuX9wzmRMeQdBJtzEA==",
       "license": "Apache-2.0"
     },
+    "node_modules/html-to-image": {
+      "version": "1.11.13",
+      "resolved": "https://registry.npmmirror.com/html-to-image/-/html-to-image-1.11.13.tgz",
+      "integrity": "sha512-cuOPoI7WApyhBElTTb9oqsawRvZ0rHhaHwghRLlTuffoD1B2aDemlCruLeZrUIIdvG7gs9xeELEPm6PhuASqrg==",
+      "license": "MIT"
+    },
     "node_modules/html2canvas": {
       "version": "1.4.1",
       "resolved": "https://registry.npmmirror.com/html2canvas/-/html2canvas-1.4.1.tgz",
       "integrity": "sha512-fPU6BHNpsyIhr8yyMpTLLxAbkaK8ArIBcmZIRiBLiDhjeqvXolaEmDGmELFuX9I4xDcaKKcJl+TKZLqruBbmWA==",
       "license": "MIT",
+      "optional": true,
       "dependencies": {
         "css-line-break": "^2.1.0",
         "text-segmentation": "^1.0.3"
@@ -7162,6 +7171,7 @@
       "resolved": "https://registry.npmmirror.com/text-segmentation/-/text-segmentation-1.0.3.tgz",
       "integrity": "sha512-iOiPUo/BGnZ6+54OsWxZidGCsdU8YbE4PSpdPinp7DeMtUJNJBoJ/ouUSTJjHkh1KntHaltHl/gDs2FC4i5+Nw==",
       "license": "MIT",
+      "optional": true,
       "dependencies": {
         "utrie": "^1.0.2"
       }
@@ -7637,6 +7647,7 @@
       "resolved": "https://registry.npmmirror.com/utrie/-/utrie-1.0.2.tgz",
       "integrity": "sha512-1MLa5ouZiOmQzUbjbu9VmjLzn1QLXBhwpUa7kdLUQK+KQ5KA9I1vk5U4YHe/X2Ch7PYnJfWuWT+VbuxbGwljhw==",
       "license": "MIT",
+      "optional": true,
       "dependencies": {
         "base64-arraybuffer": "^1.0.2"
       }