chore(github): 增加 PR AI 代码审查流程并调整 CI 触发范围

- 新增 `.github/ai-review.md` 与 `.ai-reviewignore`，用于约束 AI 审查规则和忽略生成产物。
- 新增 `.github/workflows/ai-pr-review.yml`，在 PR 上自动运行 AI 审查并支持按配置跳过。
- 调整 `.github/workflows/docker.yml`，将 PR 触发范围收敛到 `main` 分支。

.github/ai-review.md

@@ -0,0 +1,18 @@
+# LanQin Email AI Review Rules
+
+Review this repository as a security-sensitive email application. Focus on high-confidence issues that can affect production behavior.
+
+## Priorities
+
+- Authentication, authorization, ownership checks, session handling, and 2FA flows.
+- Email sending/receiving behavior, including spoofing, header injection, unsafe templates, recipient disclosure, duplicate sends, retries, and idempotency.
+- Input handling risks: SQL/NoSQL injection, command injection, path traversal, SSRF, XSS, CSRF, unsafe deserialization, and unsafe attachment uploads.
+- Secret and privacy exposure: tokens, passwords, SMTP credentials, verification codes, session IDs, cookies, PII, and logs/API responses that leak sensitive data.
+- Deployment changes: Docker, GitHub Actions, exposed ports, overly broad permissions, insecure defaults, missing health checks, and rollback-sensitive config.
+
+## Comment style
+
+- Prefer actionable, high-confidence findings over speculative comments.
+- Include the risky file path/line, trigger condition, impact, and minimal safe fix.
+- Do not comment on formatting-only issues unless they hide a real bug.
+- Treat tests passing as useful signal, not as approval by itself.

.github/workflows/ai-pr-review.yml

@@ -0,0 +1,61 @@
+name: AI PR Review
+
+on:
+  pull_request:
+    branches:
+      - main
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+concurrency:
+  group: ai-pr-review-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  ai-review:
+    name: AI PR Review
+    runs-on: ubuntu-latest
+    env:
+      OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Skip when API key is not configured
+        if: ${{ env.OPENAI_API_KEY == '' }}
+        run: echo "::notice::OPENAI_API_KEY secret is not configured; skipping AI PR review."
+
+      - name: Run AI PR reviewer
+        if: ${{ env.OPENAI_API_KEY != '' }}
+        run: npx --yes github-ai-pr-reviewer@latest --post
+        env:
+          OPENAI_API_KEY: ${{ env.OPENAI_API_KEY }}
+          OPENAI_MODEL: ${{ vars.OPENAI_MODEL || 'gpt-5.5' }}
+          OPENAI_API_MODE: ${{ vars.OPENAI_API_MODE || 'responses' }}
+          OPENAI_BASE_URL: ${{ vars.OPENAI_BASE_URL || 'https://api.openai.com/v1' }}
+          OPENAI_TIMEOUT_MS: ${{ vars.OPENAI_TIMEOUT_MS || '120000' }}
+          OPENAI_RETRIES: ${{ vars.OPENAI_RETRIES || '2' }}
+          GITHUB_TOKEN: ${{ github.token }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+          REVIEW_RULES: .github/ai-review.md,AGENTS.md
+          REVIEW_IGNORE: .ai-reviewignore
+          REVIEW_SEVERITY_THRESHOLD: P3
+          SUMMARY_MODE: review
+          REVIEW_EVENT: AUTO
+          REQUEST_CHANGES_ON: P1
+          APPROVE_WHEN_CLEAN: 'false'
+          GITHUB_TIMEOUT_MS: '30000'
+          GITHUB_RETRIES: '2'
+          # 可选：发现 P1/P0 时让 CI 失败
+          # FAIL_ON: P1

.github/workflows/docker.yml

@@ -4,13 +4,14 @@ on:
   push:
     branches:
       - main
-      - master
     tags:
       - "v*"
     paths-ignore:
       - "**/*.md"
       - "deploy/.env.example"
   pull_request:
+    branches:
+      - main
     paths-ignore:
       - "**/*.md"
       - "deploy/.env.example"