feat(extensions): single-file catalog.json registry

- Manifests gain author, description, category fields
- build workflow generates catalog.json from Extensions/raw/ and commits it
- downloadURL now points at GitHub Release assets (which GitHub counts),
  so download counts actually increment when the app installs
- route.ts reads catalog.json in one fetch (no git-tree walk, no
  per-manifest fetches, removes unauthenticated rate-limit exposure)

Author: ganeshmshetty

.github/workflows/build-extensions.yml

@@ -81,4 +81,51 @@ jobs:
               git commit -m "build(extensions): rebuild .openclipext zips [skip ci]"
               git push origin main
             fi
+          fi
+
+      - name: Generate and commit catalog.json
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -euo pipefail
+          shopt -s nullglob
+          ROOT="$(pwd)"
+          RAW_DIR="$ROOT/Extensions/raw"
+
+          # Build catalog.json from the raw extension manifests so the web API
+          # serves metadata from a single file instead of walking the GitHub tree.
+          CATALOG="$ROOT/catalog.json"
+          jq -n '{updatedAt: (now | todateiso8601), extensions: []}' > "$CATALOG"
+
+          for pkg_dir in "$RAW_DIR"/*.openclipext; do
+            [ -d "$pkg_dir" ] || continue
+            pkg_name="$(basename "$pkg_dir")"                       # e.g. AppleMusic.openclipext
+            manifest="$pkg_dir/openclip.json"
+            [ -f "$manifest" ] || continue
+
+            identifier="$(jq -r '.identifier // empty' "$manifest")"
+            if [ -z "$identifier" ]; then
+              identifier="com.openclip.${pkg_name%.openclipext}"
+              identifier="$(echo "$identifier" | tr '[:upper:]' '[:lower:]')"
+            fi
+
+            entry=$(jq -nc \
+              --arg id "$identifier" \
+              --arg name "$(jq -r '.name // (.action.title // .actions[0].title // empty)' "$manifest")" \
+              --arg desc "$(jq -r '.description // empty' "$manifest")" \
+              --arg author "$(jq -r '.author // "OpenClip Team"' "$manifest")" \
+              --arg icon "$(jq -r '(.action.icon // .actions[0].icon // "puzzlepiece")' "$manifest")" \
+              --arg category "$(jq -r '.category // "productivity"' "$manifest")" \
+              --arg version "$(jq -r '.version // "1.0.0"' "$manifest")" \
+              --arg url "https://github.com/$GITHUB_REPOSITORY/releases/download/${identifier}@$(jq -r '.version // "1.0.0"' "$manifest")/$pkg_name.zip" \
+              '{id: $id, name: $name, description: $desc, author: $author, icon: $icon, category: $category, version: $version, downloadCount: 0, downloadURL: $url}')
+
+            jq --argjson entry "$entry" '.extensions += [$entry]' "$CATALOG" > "$CATALOG.tmp"
+            mv "$CATALOG.tmp" "$CATALOG"
+          done
+
+          git add catalog.json
+          if ! git diff --cached --quiet; then
+            git commit -m "chore(extensions): regenerate catalog.json [skip ci]"
+            git push origin main
           fi

Extensions/AppleMusic.openclipext.zip

@@ -2,6 +2,9 @@
   "identifier": "com.openclip.applemusic",
   "name": "Apple Music",
   "version": "1.0.0",
+  "author": "OpenClip Team",
+  "description": "Search Apple Music for the selected text.",
+  "category": "music",
   "action": {
     "title": "Apple Music",
     "icon": "music.note",

Extensions/GoogleMaps.openclipext.zip

@@ -2,6 +2,9 @@
   "identifier": "com.openclip.googlemaps",
   "name": "Google Maps",
   "version": "1.0.0",
+  "author": "OpenClip Team",
+  "description": "Open Google Maps with the selected text as a search query.",
+  "category": "maps",
   "action": {
     "title": "Google Maps",
     "icon": "map",

Extensions/GoogleTranslate.openclipext.zip

@@ -2,6 +2,9 @@
   "identifier": "com.openclip.translate",
   "name": "Google Translate",
   "version": "1.0.0",
+  "author": "OpenClip Team",
+  "description": "Translate the selected text into English with Google Translate.",
+  "category": "translate",
   "action": {
     "title": "Translate",
     "icon": "globe",