Add GitHub Actions workflow for GitHub Pages deployment

Configure automated deployment to GitHub Pages on pushes to main branch.
Update Vite config to support dynamic base URL for GH Pages.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: shankar-gpio

.github/workflows/deploy.yml

@@ -0,0 +1,61 @@
+# Deploy to GitHub Pages
+name: Deploy to GitHub Pages
+
+on:
+  # Runs on pushes to main branch
+  push:
+    branches: ['main']
+
+  # Allows manual trigger from Actions tab
+  workflow_dispatch:
+
+# Sets permissions for GitHub Pages deployment
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment
+concurrency:
+  group: 'pages'
+  cancel-in-progress: true
+
+jobs:
+  build:
+    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: Build
+        run: npm run build
+        env:
+          BASE_URL: /${{ github.event.repository.name }}/
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: './dist'
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

vite.config.ts

@@ -5,6 +5,7 @@ import topLevelAwait from 'vite-plugin-top-level-await'
 import { resolve } from 'path'
 
 export default defineConfig({
+  base: process.env.BASE_URL || '/',
   plugins: [react(), wasm(), topLevelAwait()],
   resolve: {
     alias: {