app: ship the Oak icon on every platform surface

- Runtime window icon: X11 takes the embedded 512px PNG up front
  (_NET_WM_ICON), Wayland resolves it from oak.desktop via the app id,
  Windows reads it from the exe's icon resource.
- assets/appicon: 512px PNG + 7-size ICO rasterized from Oak_Icon.svg.
- Windows: oak.rc (ICON resource ID 1, also the Explorer icon) compiled
  by build.rs through embed-resource.
- Linux packaging (deb/rpm/PKGBUILD/oak.spec): install Oak_Icon.svg
  into the hicolor scalable theme alongside the existing 512px PNG.
- macOS: no change needed - cargo packager already builds the .icns
  from the CD-generated icons/icon.png (same source art).

tooling/package/PKGBUILD

@@ -36,6 +36,7 @@ package() {
     install -Dm755 "$OAK_BIN/oak-worker" "$pkgdir/usr/bin/oak-worker"
     install -Dm644 "$OAK_ROOT/packaging/oak.desktop" "$pkgdir/usr/share/applications/oak.desktop"
     install -Dm644 "$OAK_ROOT/icons/icon.png" "$pkgdir/usr/share/icons/hicolor/512x512/apps/oak.png"
+    install -Dm644 "$OAK_ROOT/Oak_Icon.svg" "$pkgdir/usr/share/icons/hicolor/scalable/apps/oak.svg"
     for f in "$OAK_ROOT"/assets/i18n/*.yaml; do
         install -Dm644 "$f" "$pkgdir/usr/share/oak/i18n/$(basename "$f")"
     done

tooling/package/build-deb.sh

@@ -26,12 +26,13 @@ STAGING=target/pkg/deb
 rm -rf "$STAGING"
 mkdir -p "$STAGING/usr/bin" "$STAGING/usr/share/applications" \
 	"$STAGING/usr/share/icons/hicolor/512x512/apps" "$STAGING/usr/share/oak/i18n" \
-	"$STAGING/DEBIAN"
+	"$STAGING/usr/share/icons/hicolor/scalable/apps" "$STAGING/DEBIAN"
 
 install -m755 target/release/oak-editor target/release/oak-cli target/release/oak-worker \
 	"$STAGING/usr/bin/"
 install -m644 packaging/oak.desktop "$STAGING/usr/share/applications/oak.desktop"
 install -m644 icons/icon.png "$STAGING/usr/share/icons/hicolor/512x512/apps/oak.png"
+install -m644 Oak_Icon.svg "$STAGING/usr/share/icons/hicolor/scalable/apps/oak.svg"
 install -m644 assets/i18n/*.yaml "$STAGING/usr/share/oak/i18n/"
 
 # The full shlib dependency set (FFmpeg/OCIO are statically linked, so

tooling/package/build-rpm.sh

@@ -28,11 +28,13 @@ mkdir -p "$TOP"/{BUILD,RPMS,SOURCES,SPECS,BUILDROOT}
 
 ROOT="$TOP/BUILDROOT/oak-editor-$VERSION-1.x86_64"
 mkdir -p "$ROOT/usr/bin" "$ROOT/usr/share/applications" \
-	"$ROOT/usr/share/icons/hicolor/512x512/apps" "$ROOT/usr/share/oak/i18n"
+	"$ROOT/usr/share/icons/hicolor/512x512/apps" "$ROOT/usr/share/oak/i18n" \
+	"$ROOT/usr/share/icons/hicolor/scalable/apps"
 install -m755 target/release/oak-editor target/release/oak-cli target/release/oak-worker \
 	"$ROOT/usr/bin/"
 install -m644 packaging/oak.desktop "$ROOT/usr/share/applications/oak.desktop"
 install -m644 icons/icon.png "$ROOT/usr/share/icons/hicolor/512x512/apps/oak.png"
+install -m644 Oak_Icon.svg "$ROOT/usr/share/icons/hicolor/scalable/apps/oak.svg"
 install -m644 assets/i18n/*.yaml "$ROOT/usr/share/oak/i18n/"
 
 rpmbuild -bb \

tooling/package/oak.spec

@@ -39,6 +39,7 @@ true
 /usr/bin/oak-worker
 /usr/share/applications/oak.desktop
 /usr/share/icons/hicolor/512x512/apps/oak.png
+/usr/share/icons/hicolor/scalable/apps/oak.svg
 /usr/share/oak/i18n/
 
 %changelog