feat: comprehensive HEIC/HEIF support and edit-metadata ExifTool overhaul

- Add ensureSharpCompat() helper for automatic HEIC detection and decode
- Fix HEIC support in all 14 custom-route tools (image-to-pdf, split,
  barcode-read, compose, collage, stitch, compare, find-duplicates,
  color-palette, watermark-image, vectorize, favicon, info, branding)
- Fix PdfPagePreview using store's decoded blobUrl instead of raw File
- Add onError fallback in ImageViewer for unrenderable formats
- Fix image-to-pdf progress bar with flushSync for reliable rendering
- Add ExifTool backend for edit-metadata (GPS, keywords, IPTC, dates)
- Rename Strip Metadata to Remove Metadata with interactive Leaflet map
- Fix user-files thumbnail generation for stored HEIC files
- Fix info tool stats() histogram for HEIC via decoded buffer
- Skip HEIC preprocessing in batch route for metadata tools

packages/shared/src/constants.ts

@@ -57,7 +57,7 @@ export const TOOLS: Tool[] = [
   // Optimization
   {
     id: "strip-metadata",
-    name: "Strip Metadata",
+    name: "Remove Metadata",
     description: "Remove EXIF, GPS, and camera info",
     category: "optimization",
     icon: "ShieldOff",

packages/shared/src/i18n/en.ts

@@ -35,8 +35,11 @@ export const en = {
     rotate: { name: "Rotate & Flip", description: "Rotate, flip, and straighten images" },
     convert: { name: "Convert", description: "Convert between image formats" },
     compress: { name: "Compress", description: "Reduce file size by quality or target size" },
-    "strip-metadata": { name: "Strip Metadata", description: "Remove EXIF, GPS, and camera info" },
-    "edit-metadata": { name: "Edit Metadata", description: "Edit EXIF, GPS, and camera info" },
+    "strip-metadata": { name: "Remove Metadata", description: "Remove EXIF, GPS, and camera info" },
+    "edit-metadata": {
+      name: "Edit Metadata",
+      description: "Edit EXIF, IPTC, XMP, GPS, keywords, and dates",
+    },
     "bulk-rename": { name: "Bulk Rename", description: "Rename multiple files with patterns" },
     "image-to-pdf": { name: "Image to PDF", description: "Combine images into a PDF document" },
     "pdf-to-image": { name: "PDF to Image", description: "Convert PDF pages to images" },