feat: add local auth billing and usage management

tests/frontend-environment-copy.test.ts

@@ -0,0 +1,40 @@
+import { readdir, readFile } from "node:fs/promises";
+import { join } from "node:path";
+import { describe, expect, it } from "vitest";
+
+const forbiddenCopy = [
+  "本地",
+  "开发环境",
+  "Mock",
+  ".runtime/",
+  "演示用户"
+];
+
+describe("production-facing copy", () => {
+  it("does not expose development or implementation labels in React UI", async () => {
+    const files = [
+      ...await sourceFiles(join(process.cwd(), "app")),
+      ...await sourceFiles(join(process.cwd(), "components"))
+    ];
+    const matches: string[] = [];
+
+    for (const file of files) {
+      const source = await readFile(file, "utf8");
+      for (const copy of forbiddenCopy) {
+        if (source.includes(copy)) matches.push(`${file}: ${copy}`);
+      }
+    }
+
+    expect(matches).toEqual([]);
+  });
+});
+
+async function sourceFiles(directory: string): Promise<string[]> {
+  const entries = await readdir(directory, { withFileTypes: true });
+  const files = await Promise.all(entries.map(async (entry) => {
+    const path = join(directory, entry.name);
+    if (entry.isDirectory()) return sourceFiles(path);
+    return entry.isFile() && path.endsWith(".tsx") ? [path] : [];
+  }));
+  return files.flat();
+}