fix(ci): install ImageMagick + Playwright Chromium in test job

.github/workflows/test.yml

@@ -42,6 +42,29 @@ jobs:
       - name: Markdown lint
         run: bun run validate:md
 
+      - name: Install ImageMagick (with magick v7 dispatcher wrapper)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y imagemagick
+          # Ubuntu ships ImageMagick 6 (separate binaries: convert, identify, etc.).
+          # build-demo-manifest.ts and its test use the v7 multi-call entrypoint
+          # (magick, magick identify, ...). Install a small dispatcher at
+          # /usr/local/bin/magick that forwards to the v6 binary by subcommand.
+          sudo tee /usr/local/bin/magick > /dev/null <<'WRAPPER'
+          #!/bin/bash
+          case "$1" in
+            identify|convert|mogrify|composite|montage|compare|conjure|stream|display|animate|import)
+              cmd="$1"; shift; exec "$cmd" "$@" ;;
+            *)
+              exec convert "$@" ;;
+          esac
+          WRAPPER
+          sudo chmod +x /usr/local/bin/magick
+          magick -version | head -1
+
+      - name: Install Playwright Chromium (browser-audit)
+        run: bunx playwright install --with-deps chromium
+
       - name: Run tests
         run: bun run test