fix(POSTV1-06): 恢复贴纸与字体运行时资源链路

tests/integration/wp0-04-local-data-root.test.ts

@@ -22,6 +22,7 @@ import {
   defaultLocalDataRoot,
   initializeLocalDataRoot,
   inspectInitializedLocalDataRoot,
+  readConfiguredAssetRoot,
   resolvePathWithinRoot,
   validateLocalDataRoot,
   validateReadOnlyAssetRoot,
@@ -66,6 +67,17 @@ afterEach(() => {
 });
 
 describe("TDD-WP0-DATA-001-root-validation", () => {
+  it("reads only an absolute configured read-only asset root", () => {
+    const base = temporaryDirectory();
+    const configFile = join(base, "instance.json");
+    const assetRoot = join(base, "runtime-assets");
+    writeFileSync(configFile, JSON.stringify({ asset_root: assetRoot }));
+
+    expect(readConfiguredAssetRoot(configFile)).toBe(resolve(assetRoot));
+    writeFileSync(configFile, JSON.stringify({ asset_root: "relative-assets" }));
+    expect(() => readConfiguredAssetRoot(configFile)).toThrow("asset_root_configuration_invalid");
+  });
+
   it("derives default data and configuration paths from LOCALAPPDATA without a hardcoded user", () => {
     const localAppData = join(temporaryDirectory(), "LocalAppData");
     expect(defaultLocalDataRoot({ LOCALAPPDATA: localAppData })).toBe(join(localAppData, "Dada", "P0A", "data"));