Add page numbers (#4500)

# Description of Changes

Idk why i added a brightness detector for white/black text but hey its
been done now


## 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/devGuide/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/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] 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/devGuide/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)

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

---------

Co-authored-by: EthanHealy01 <[email protected]>

frontend/public/locales/en-GB/translation.json

@@ -16,16 +16,34 @@
     "selectText": {
       "1": "Select PDF file:",
       "2": "Margin Size",
-      "3": "Position",
+      "3": "Position Selection",
       "4": "Starting Number",
       "5": "Pages to Number",
-      "6": "Custom Text"
+      "6": "Custom Text Format"
     },
     "customTextDesc": "Custom Text",
-    "numberPagesDesc": "Which pages to number, default 'all', also accepts 1-5 or 2,5,9 etc",
-    "customNumberDesc": "Defaults to {n}, also accepts 'Page {n} of {total}', 'Text-{n}', '{filename}-{n}",
-    "submit": "Add Page Numbers"
+    "numberPagesDesc": "e.g., 1,3,5-8 or leave blank for all pages",
+    "customNumberDesc": "e.g., \"Page {n}\" or leave blank for just numbers",
+    "submit": "Add Page Numbers",
+    "configuration": "Configuration",
+    "customize": "Customize Appearance",
+    "pagesAndStarting": "Pages & Starting Number",
+    "positionAndPages": "Position & Pages",
+    "error": {
+      "failed": "Add page numbers operation failed"
+    },
+    "results": {
+      "title": "Page Number Results"
+    },
+    "preview": "Position Selection",
+    "previewDisclaimer": "Preview is approximate. Final output may vary due to PDF font metrics."
   },
+  "pageSelectionPrompt": "Specify which pages to add numbers to. Examples: \"1,3,5\" for specific pages, \"1-5\" for ranges, \"2n\" for even pages, or leave blank for all pages.",
+  "startingNumberTooltip": "The first number to display. Subsequent pages will increment from this number.",
+  "marginTooltip": "Distance between the page number and the edge of the page.",
+  "fontSizeTooltip": "Size of the page number text in points. Larger numbers create bigger text.",
+  "fontTypeTooltip": "Font family for the page numbers. Choose based on your document style.",
+  "customTextTooltip": "Optional custom format for page numbers. Use {n} as placeholder for the number. Example: \"Page {n}\" will show \"Page 1\", \"Page 2\", etc.",
   "pdfPrompt": "Select PDF(s)",
   "multiPdfPrompt": "Select PDFs (2+)",
   "multiPdfDropPrompt": "Select (or drag & drop) all PDFs you require",