chore: add gui smoke check

scripts/check-gui.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+# Static GUI smoke check for Wails/Svelte builds.
+
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+GUI_BUILD_OUT="${GUI_BUILD_OUT:-/tmp/verstak-gui-check}"
+
+echo "=== Checking GUI locale/source hygiene ==="
+"$ROOT/scripts/check-i18n.sh"
+
+echo ""
+echo "=== Building frontend production bundle ==="
+(cd "$ROOT/frontend" && npm run build)
+
+echo ""
+echo "=== Checking embedded Wails assets ==="
+if [ ! -d "$ROOT/cmd/verstak-gui/frontend-dist" ]; then
+  echo "FAIL: cmd/verstak-gui/frontend-dist is missing"
+  echo "Run ./scripts/build.sh gui and commit the embedded assets."
+  exit 1
+fi
+
+if ! diff -qr "$ROOT/frontend/dist" "$ROOT/cmd/verstak-gui/frontend-dist"; then
+  echo ""
+  echo "FAIL: embedded Wails assets are stale."
+  echo "Run ./scripts/build.sh gui and commit cmd/verstak-gui/frontend-dist."
+  exit 1
+fi
+
+echo "OK: embedded Wails assets match frontend/dist"
+
+echo ""
+echo "=== Compiling GUI binary ==="
+go build -tags "webkit2_41 desktop production" -ldflags="-s -w" -o "$GUI_BUILD_OUT" "$ROOT/cmd/verstak-gui/"
+
+echo "OK: GUI smoke check passed"