fix: resolve 7 bugs from QA sweep (#208)

- Fix selective metadata stripping (P1): use Sharp's keepExif()/keepIccProfile()
  instead of broken withMetadata({}) that preserved everything
- Fix meme font mapping (P1): add ArchivoBlack and ComicNeue fonts, map
  arial-black and comic-sans to correct TTF files instead of Anton
- Fix meme contentType (P2): detect actual output format from Sharp metadata
  instead of hardcoding image/png
- Fix info/text-overlay/color-palette i18n (P2): wire up existing translation
  keys that were imported but never used
- Fix info and color-palette displayMode (P2): change from before-after to
  no-comparison since neither tool produces a processed image
- Add missing i18n keys across all 21 locales
- Update displayMode test assertions

packages/shared/src/i18n/ar.ts

@@ -919,6 +919,8 @@ export const ar: TranslationKeys = {
       submit: "إضافة نص",
       submitBatch: "إضافة نص ({count} ملف)",
       progressLabel: "جاري إضافة النص",
+      download: "Download",
+      defaultText: "Your Text Here",
     },
     compose: {
       uploadOverlay: "رفع صورة التراكب",
@@ -960,6 +962,13 @@ export const ar: TranslationKeys = {
       hasExif: "بيانات EXIF",
       hasIcc: "بيانات ICC",
       hasXmp: "بيانات XMP",
+      readInfo: "Read Info",
+      reading: "Reading...",
+      channelStats: "Channel Stats",
+      yes: "Yes",
+      no: "No",
+      na: "N/A",
+      failedToRead: "Failed to read info",
     },
     compare: {
       uploadSecondImage: "رفع الصورة الثانية",