ci: add lint workflow and update changelog

Agent-Logs-Url: https://github.com/sxjeru/CLIProxyAPI-Monitor/sessions/4dead3e2-6fd2-48ee-ac31-a7acb400c2ad

Co-authored-by: sxjeru <20513115+sxjeru@users.noreply.github.com>

Author: Copilot

.github/workflows/lint.yml

@@ -0,0 +1,30 @@
+name: Lint
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+
+      - name: Setup pnpm
+        run: corepack enable
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Run lint
+        run: pnpm lint

CHANGELOG.md

@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## 2026-04-21
+
+- 新增 GitHub Actions `lint` 工作流（`.github/workflows/lint.yml`）：
+  - 在 `push`（`main/master`）与 `pull_request` 触发，统一执行 `pnpm install --frozen-lockfile` 与 `pnpm lint`。
+  - 通过 CI 自动校验代码风格，减少未被本地发现的 lint 问题进入主分支。
+
 ## 2026-04-15
 
 - 兼容 TypeScript 6.0.2 编译配置：