Fix: windows x86_64 packaging behavior

scripts/package_windows.py

@@ -32,6 +32,7 @@ class FrontendLayout:
     binary_name: str
     artifact_name: str
     readme_run: str
+    runtime_files: tuple[str, ...] = ()
 
 
 FRONTENDS: dict[str, FrontendLayout] = {
@@ -48,6 +49,7 @@ FRONTENDS: dict[str, FrontendLayout] = {
         binary_name="sprimo-tauri.exe",
         artifact_name="sprimo-tauri-windows-x64",
         readme_run="sprimo-tauri.exe",
+        runtime_files=("WebView2Loader.dll",),
     ),
 }
 
@@ -108,6 +110,18 @@ def ensure_release_binary(frontend: FrontendLayout) -> Path:
     return binary_path
 
 
+def ensure_runtime_files(frontend: FrontendLayout, binary_dir: Path) -> list[Path]:
+    resolved: list[Path] = []
+    for filename in frontend.runtime_files:
+        path = binary_dir / filename
+        if not path.exists():
+            raise PackagingError(
+                f"required runtime file missing for {frontend.id}: {path}"
+            )
+        resolved.append(path)
+    return resolved
+
+
 def ensure_assets() -> None:
     required = [
         ASSETS_REL / "sprite-packs" / "default" / "manifest.json",
@@ -140,6 +154,7 @@ def package(frontend: FrontendLayout) -> PackageLayout:
     version = read_version()
     ensure_assets()
     binary = ensure_release_binary(frontend)
+    runtime_files = ensure_runtime_files(frontend, binary.parent)
 
     DIST.mkdir(parents=True, exist_ok=True)
     artifact_name = f"{frontend.artifact_name}-v{version}"
@@ -151,6 +166,8 @@ def package(frontend: FrontendLayout) -> PackageLayout:
         stage.mkdir(parents=True, exist_ok=True)
 
         shutil.copy2(binary, stage / frontend.binary_name)
+        for runtime_file in runtime_files:
+            shutil.copy2(runtime_file, stage / runtime_file.name)
         shutil.copytree(ASSETS_REL, stage / "assets", dirs_exist_ok=True)
 
         readme = stage / "README.txt"
@@ -198,6 +215,7 @@ def smoke(frontend: FrontendLayout) -> None:
             pkg_root / "assets" / "sprite-packs" / "default" / "manifest.json",
             pkg_root / "assets" / "sprite-packs" / "default" / "sprite.png",
         ]
+        required.extend(pkg_root / filename for filename in frontend.runtime_files)
         missing = [path for path in required if not path.exists()]
         if missing:
             joined = ", ".join(str(path) for path in missing)