app: package the UI icons and resolve assets at runtime

- the packager resources only carried assets/i18n, so installed builds
  showed blank toolbar glyphs: add assets/icons to the Windows/macOS
  packages and install it to /usr/share/oak/icons in the deb/rpm/pkg
  scripts;
- icon_path resolved through the compile-time CARGO_MANIFEST_DIR (the CI
  checkout path), which never exists on a user machine: search the
  runtime layouts instead — dev checkout, next to the executable,
  Contents/Resources, usr/lib/oak-editor (cargo-packager's deb/AppImage
  layout) and /usr/share/oak — mirroring the i18n pack search, which
  gains the same usr/lib/oak-editor candidate so the AppImage finds its
  language packs too.

Verified: oak-app 556 tests pass; the deb and rpm now carry
/usr/share/oak/icons/{dark,light}/*.png.

crates/oak-app/Cargo.toml

@@ -147,12 +147,16 @@ category = "Video"
 icons = ["../../icons/icon.png"]
 # The UI string tables (language packs); users can drop extra
 # <lang>.yaml files into the installed i18n directory.
+# The theme-aware UI glyphs (dark/ + light/), resolved at runtime by
+# crates/oak-app/src/oakui/icons.rs from `<exe dir>/icons` (Windows/Linux
+# packages) or `Contents/Resources/icons` (macOS bundle).
 # The Windows DLL staging dir is filled by
 # tooling/package/bundle-dylibs-windows.sh before `cargo packager` runs
 # (NSIS/WiX place resources next to the executable, which is exactly
 # where Windows resolves DLLs from). Empty locally = no bundled DLLs.
 resources = [
     "../../assets/i18n",
+    "../../assets/icons",
     { src = "../../target/pkg/win-dlls/*.dll", target = "." },
 ]
 binaries = [

crates/oak-app/src/i18n.rs

@@ -219,6 +219,8 @@ fn pack_dirs() -> Vec<std::path::PathBuf> {
 			if let Some(contents) = dir.parent() {
 				// macOS bundle: <exe>/../Resources/i18n.
 				dirs.push(contents.join("Resources/i18n"));
+				// cargo-packager deb/AppImage: <exe>/../lib/oak-editor/i18n.
+				dirs.push(contents.join("lib/oak-editor/i18n"));
 				// System install (deb/rpm/pkg): <exe>/../share/oak/i18n.
 				dirs.push(contents.join("share/oak/i18n"));
 			}

crates/oak-app/src/oakui/icons.rs

@@ -49,8 +49,12 @@ pub const ICON_NEXT: &str = "next";
 pub const ICON_REW: &str = "rew";
 pub const ICON_FF: &str = "ff";
 
-/// The theme-dependent filesystem path of an icon (`assets/icons/{dark,light}`
-/// under the crate root). Absolute, so it works from any working directory.
+/// The theme-dependent filesystem path of an icon. The icons root is
+/// resolved at runtime — the packagers install `assets/icons` next to the
+/// binary (Windows/Linux packages), into `Contents/Resources` (macOS
+/// bundle) or `/usr/share/oak` (deb/rpm/pacman system installs) — with
+/// the dev checkout as a fallback. Absolute, so it works from any working
+/// directory.
 pub fn icon_path(name: &str, cx: &App) -> PathBuf {
 	let theme = gpui_widgets::theme::current_theme(cx);
 	let family = if theme.name == "Olive Dark" {
@@ -58,10 +62,36 @@ pub fn icon_path(name: &str, cx: &App) -> PathBuf {
 	} else {
 		"light"
 	};
-	PathBuf::from(env!("CARGO_MANIFEST_DIR"))
-		.join("../../assets/icons")
-		.join(family)
-		.join(format!("{name}.png"))
+	icon_root().join(family).join(format!("{name}.png"))
+}
+
+/// The first icons directory that exists, in precedence order (mirrors the
+/// i18n pack search in `crate::i18n`). Cached: one process resolves one
+/// directory.
+fn icon_root() -> &'static PathBuf {
+	static ROOT: std::sync::OnceLock<PathBuf> = std::sync::OnceLock::new();
+	ROOT.get_or_init(|| {
+		let dev = || PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../../assets/icons");
+		let mut candidates = vec![dev()];
+		if let Ok(exe) = std::env::current_exe() {
+			if let Some(dir) = exe.parent() {
+				candidates.push(dir.join("icons"));
+				candidates.push(dir.join("assets/icons"));
+				if let Some(contents) = dir.parent() {
+					candidates.push(contents.join("Resources/icons"));
+					candidates.push(contents.join("Resources/assets/icons"));
+					// cargo-packager deb/AppImage: <exe>/../lib/oak-editor/icons.
+					candidates.push(contents.join("lib/oak-editor/icons"));
+					candidates.push(contents.join("share/oak/icons"));
+				}
+			}
+		}
+		candidates.push(PathBuf::from("assets/icons"));
+		candidates
+			.into_iter()
+			.find(|dir| dir.join("dark").is_dir())
+			.unwrap_or_else(dev)
+	})
 }
 
 /// Registers the app's icon resolver, so widget-crate consumers (the viewer

tooling/package/PKGBUILD

@@ -40,4 +40,12 @@ package() {
     for f in "$OAK_ROOT"/assets/i18n/*.yaml; do
         install -Dm644 "$f" "$pkgdir/usr/share/oak/i18n/$(basename "$f")"
     done
+    # The theme-aware UI glyphs (resolved at runtime from
+    # /usr/share/oak/icons; see crates/oak-app/src/oakui/icons.rs).
+    for d in "$OAK_ROOT"/assets/icons/*/; do
+        fam=$(basename "$d")
+        for f in "$d"*.png; do
+            install -Dm644 "$f" "$pkgdir/usr/share/oak/icons/$fam/$(basename "$f")"
+        done
+    done
 }

tooling/package/build-deb.sh

@@ -39,6 +39,7 @@ 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/usr/share/oak/icons" \
 	"$STAGING/usr/share/icons/hicolor/scalable/apps" "$STAGING/DEBIAN"
 
 install -m755 target/release/oak-editor target/release/oak-cli target/release/oak-worker \
@@ -53,6 +54,9 @@ else
 fi
 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 theme-aware UI glyphs (resolved at runtime from
+# /usr/share/oak/icons; see crates/oak-app/src/oakui/icons.rs).
+cp -a assets/icons/. "$STAGING/usr/share/oak/icons/"
 
 # vcpkg's libva/libva-drm are shared libraries that FFmpeg links
 # dynamically. Debian 12 / openKylin carry an older libva than FFmpeg 8

tooling/package/build-rpm.sh

@@ -33,6 +33,7 @@ mkdir -p "$TOP"/{BUILD,RPMS,SOURCES,SPECS,BUILDROOT}
 STAGE="$TOP/stage"
 mkdir -p "$STAGE/usr/bin" "$STAGE/usr/share/applications" \
 	"$STAGE/usr/share/icons/hicolor/512x512/apps" "$STAGE/usr/share/oak/i18n" \
+	"$STAGE/usr/share/oak/icons" \
 	"$STAGE/usr/share/icons/hicolor/scalable/apps"
 install -m755 target/release/oak-editor target/release/oak-cli target/release/oak-worker \
 	"$STAGE/usr/bin/"
@@ -40,6 +41,9 @@ install -m644 packaging/oak.desktop "$STAGE/usr/share/applications/oak.desktop"
 install -m644 icons/icon.png "$STAGE/usr/share/icons/hicolor/512x512/apps/oak.png"
 install -m644 Oak_Icon.svg "$STAGE/usr/share/icons/hicolor/scalable/apps/oak.svg"
 install -m644 assets/i18n/*.yaml "$STAGE/usr/share/oak/i18n/"
+# The theme-aware UI glyphs (resolved at runtime from
+# /usr/share/oak/icons; see crates/oak-app/src/oakui/icons.rs).
+cp -a assets/icons/. "$STAGE/usr/share/oak/icons/"
 
 rpmbuild -bb \
 	--define "_topdir $TOP" \