docs: 交付文档、维护指引与端到端回归

补齐 README、开发计划、维护交接与 E2E 用例，执行最终验收。

e2e/tsconfig.json

@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "lib": ["ES2022", "DOM"],
+    "types": ["node"],
+    "strict": true,
+    "noEmit": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "experimentalDecorators": false,
+    "baseUrl": ".",
+    "paths": {
+      "@e2e": ["./src/index.ts"],
+      "@e2e/*": ["./src/*"]
+    }
+  },
+  "include": ["playwright.config.ts", "src/**/*.ts", "specs/**/*.ts", "services/**/*.ts"]
+}