deps(frontend): upgrade Cantoo PDF library to 2.8.2 (#7493)

# Description of Changes

This pull request upgrades the frontend PDF dependency from
`@cantoo/pdf-lib` 2.6.5 to 2.8.2.

- Updated `frontend/package.json` to require `@cantoo/pdf-lib` `^2.8.2`.
- Regenerated `frontend/package-lock.json` with `@cantoo/pdf-lib@2.8.2`,
`pako@2.2.0`, and `node-html-better-parser@1.5.9`.
- Added the root npm `pako` override recommended by the upstream
release.
- The upgrade brings upstream parser, object-stream, encryption, form,
PNG, and PDF serialization fixes into the frontend dependency.
- No application API migration was required because the project does not
use the newly added PDF/A, XFA, Factur-X, incremental-update, fontkit,
or page-content-extraction APIs.

The main challenge was validating the broad upstream change set against
the project's actual usage. The frontend typecheck and a direct PDF
create/save/load smoke test passed. The complete `frontend:check` and
`frontend:test` tasks exceeded the available execution timeout without
reporting a test failure.

No related issue.

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

frontend/package-lock.json

@@ -10,7 +10,7 @@
       "license": "SEE LICENSE IN https://raw.githubusercontent.com/Stirling-Tools/Stirling-PDF/refs/heads/main/proprietary/LICENSE",
       "dependencies": {
         "@atlaskit/pragmatic-drag-and-drop": "^1.7.7",
-        "@cantoo/pdf-lib": "^2.5.3",
+        "@cantoo/pdf-lib": "^2.8.2",
         "@dnd-kit/core": "^6.3.1",
         "@embedpdf/core": "^2.14.4",
         "@embedpdf/engines": "^2.14.4",
@@ -606,18 +606,22 @@
       }
     },
     "node_modules/@cantoo/pdf-lib": {
-      "version": "2.6.5",
-      "resolved": "https://registry.npmjs.org/@cantoo/pdf-lib/-/pdf-lib-2.6.5.tgz",
-      "integrity": "sha512-3eMHEaqKHt/G/q+6QjT06A3lz0S/a8x3+myiSN7FNeL3uWcedO0lpfs6TWofa4C03Z1wz3tWeHoa4CsI7DrTSA==",
+      "version": "2.8.2",
+      "resolved": "https://registry.npmjs.org/@cantoo/pdf-lib/-/pdf-lib-2.8.2.tgz",
+      "integrity": "sha512-f0BJM3uPOjbPR3YriSEUIaTM0qnqthjFmTZX9NGI0NDM2Tj4a8xv7Z5Hb6jzUrhfb3/9Y77+xxoOln0IIiYq+w==",
       "license": "MIT",
       "dependencies": {
         "@pdf-lib/standard-fonts": "^1.0.0",
         "@pdf-lib/upng": "^1.0.1",
         "color": "^4.2.3",
         "crypto-js": "^4.2.0",
-        "node-html-better-parser": ">=1.4.0",
-        "pako": "^1.0.11",
+        "html-entities": "^2.3.2",
+        "node-html-better-parser": ">=1.5.9",
+        "pako": "^2.2.0",
         "tslib": ">=2"
+      },
+      "peerDependencies": {
+        "html-entities": "^2.3.2"
       }
     },
     "node_modules/@csstools/color-helpers": {
@@ -12459,9 +12463,9 @@
       }
     },
     "node_modules/node-html-better-parser": {
-      "version": "1.5.8",
-      "resolved": "https://registry.npmjs.org/node-html-better-parser/-/node-html-better-parser-1.5.8.tgz",
-      "integrity": "sha512-t/wAKvaTSKco43X+yf9+76RiMt18MtMmzd4wc7rKj+fWav6DV4ajDEKdWlLzSE8USDF5zr/06uGj0Wr/dGAFtw==",
+      "version": "1.5.9",
+      "resolved": "https://registry.npmjs.org/node-html-better-parser/-/node-html-better-parser-1.5.9.tgz",
+      "integrity": "sha512-z1I5UINMezJXYL9cH3h0a9KBth2G978gSLlfkpQ+CQzzVHVQy9gpARgm9eDsz1O4gn1HtgUqjdAIYxKFZm6uHQ==",
       "license": "MIT",
       "dependencies": {
         "html-entities": "^2.3.2"
@@ -12751,9 +12755,19 @@
       "license": "MIT"
     },
     "node_modules/pako": {
-      "version": "1.0.11",
-      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
-      "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw==",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-2.2.0.tgz",
+      "integrity": "sha512-zJq6RP/5q+TO2OpFV3FHzlPnFjmkb7Nc99a5SNjJE+uu/PkpChs+NIZSSzbBoD+6kjiISXjfYdwj1ZRQ81dz/w==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/puzrin"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/nodeca"
+        }
+      ],
       "license": "(MIT AND Zlib)"
     },
     "node_modules/parent-module": {

frontend/package.json

@@ -7,7 +7,7 @@
   "proxy": "http://localhost:8080",
   "dependencies": {
     "@atlaskit/pragmatic-drag-and-drop": "^1.7.7",
-    "@cantoo/pdf-lib": "^2.5.3",
+    "@cantoo/pdf-lib": "^2.8.2",
     "@dnd-kit/core": "^6.3.1",
     "@embedpdf/core": "^2.14.4",
     "@embedpdf/engines": "^2.14.4",
@@ -171,6 +171,7 @@
   },
   "overrides": {
     "devalue": "^5.8.1",
+    "pako": "^2.2.0",
     "tsconfck": {
       "typescript": "$typescript"
     }