chore: standardize repository tooling

Author: afc163

.github/workflows/react-doctor.yml

@@ -0,0 +1,21 @@
+name: React Doctor
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+  statuses: write
+
+jobs:
+  react-doctor:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+      - uses: millionco/react-doctor@v2

.github/workflows/surge-preview.yml

@@ -0,0 +1,31 @@
+name: Surge Preview
+
+on:
+  pull_request:
+
+permissions:
+  contents: read
+  pull-requests: write
+  checks: write
+
+jobs:
+  preview:
+    runs-on: ubuntu-latest
+    env:
+      SURGE_TOKEN: ${{ secrets.SURGE_TOKEN }}
+    steps:
+      - uses: actions/checkout@v5
+      - uses: afc163/surge-preview@v1
+        if: ${{ env.SURGE_TOKEN != '' }}
+        with:
+          surge_token: ${{ env.SURGE_TOKEN }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          dist: dist
+          failOnError: true
+          setCommitStatus: true
+          build: |
+            npm install
+            npm run build
+      - name: Skip Surge preview
+        if: ${{ env.SURGE_TOKEN == '' }}
+        run: echo "SURGE_TOKEN is not configured; skip Surge preview."