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

apps/web/src/lib/tool-registry.tsx

@@ -417,7 +417,7 @@ export const toolRegistry = new Map<string, ToolRegistryEntry>([
   ],
 
   // Utilities
-  ["info", { displayMode: "before-after", Settings: InfoSettings }],
+  ["info", { displayMode: "no-comparison", Settings: InfoSettings }],
   ["compare", { displayMode: "before-after", Settings: CompareSettings }],
   [
     "find-duplicates",
@@ -427,7 +427,7 @@ export const toolRegistry = new Map<string, ToolRegistryEntry>([
       ResultsPanel: FindDuplicatesResults,
     },
   ],
-  ["color-palette", { displayMode: "before-after", Settings: ColorPaletteSettings }],
+  ["color-palette", { displayMode: "no-comparison", Settings: ColorPaletteSettings }],
   [
     "qr-generate",
     { displayMode: "no-dropzone", Settings: QrGenerateSettings, ResultsPanel: QrGeneratePreview },