chore: fix dependabot alerts and add dependency automation

.github/dependabot.yml

@@ -0,0 +1,53 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    target-branch: "main"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "09:00"
+      timezone: "Asia/Shanghai"
+    open-pull-requests-limit: 5
+    labels:
+      - "dependencies"
+      - "npm"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    groups:
+      production-dependencies:
+        dependency-type: "production"
+        update-types:
+          - "minor"
+          - "patch"
+      development-tooling:
+        dependency-type: "development"
+        update-types:
+          - "minor"
+          - "patch"
+    ignore:
+      - dependency-name: "react"
+        update-types:
+          - "version-update:semver-major"
+      - dependency-name: "react-dom"
+        update-types:
+          - "version-update:semver-major"
+      - dependency-name: "vite"
+        update-types:
+          - "version-update:semver-major"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    target-branch: "main"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "09:30"
+      timezone: "Asia/Shanghai"
+    open-pull-requests-limit: 3
+    labels:
+      - "dependencies"
+      - "github-actions"
+    commit-message:
+      prefix: "chore"
+      include: "scope"

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Build
+        run: npm run build
+
+      - name: Audit dependencies
+        run: npm run audit