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/eslint.config.js

@@ -0,0 +1,47 @@
+import playwright from 'eslint-plugin-playwright'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  { ignores: ['node_modules/', 'test-results/', 'playwright-report/', '.cache/', '.stack/', '.auth/', 'src/api/schema.d.ts'] },
+  ...tseslint.configs.recommended,
+  {
+    files: ['**/*.ts'],
+    languageOptions: { parserOptions: { projectService: true, tsconfigRootDir: import.meta.dirname } },
+    rules: {
+      // A missing await is the classic Playwright flake.
+      '@typescript-eslint/no-floating-promises': 'error',
+    },
+  },
+  {
+    ...playwright.configs['flat/recommended'],
+    files: ['specs/**/*.ts', 'src/**/*.ts'],
+    rules: {
+      ...playwright.configs['flat/recommended'].rules,
+      'playwright/no-wait-for-timeout': 'error',
+      'playwright/no-force-option': 'error',
+      'playwright/prefer-web-first-assertions': 'error',
+      // Steps live in page objects and components, which run inside tests.
+      'playwright/no-standalone-expect': 'off',
+      // Shared helpers that assert inside count as assertions.
+      'playwright/expect-expect': ['error', { assertFunctionNames: ['expect', 'expectUnchanged', 'expectNoNewA11yViolations'] }],
+    },
+  },
+  {
+    // Setup is idempotent by design: create the org on an empty DB, sign in otherwise.
+    files: ['specs/setup/**'],
+    rules: { 'playwright/no-conditional-in-test': 'off', 'playwright/no-conditional-expect': 'off' },
+  },
+  {
+    // Specs describe behaviour; selectors belong in src/pages and src/components,
+    // seeding in src/api. See AUTHORING.md.
+    files: ['specs/**/*.ts'],
+    ignores: ['specs/setup/**'],
+    rules: {
+      'no-restricted-syntax': ['error',
+        { selector: "CallExpression[callee.property.name='locator']", message: 'Selectors belong in a page object or component (src/pages, src/components).' },
+        { selector: "CallExpression[callee.property.name=/^(fetch|post|put|patch|delete)$/][callee.object.name='request']", message: 'Seed through src/api, not raw requests.' },
+      ],
+      'no-restricted-imports': ['error', { paths: [{ name: '@playwright/test', message: "Import from '@e2e' so every spec gets the shared fixtures." }] }],
+    },
+  },
+)