chore: unify the labs under one GitHub Pages site

Each web demo builds with its base path under /ai-coding-workflow-labs/,
a single deploy workflow assembles them with a root index, and the
per-directory workflows from the standalone repos are removed.

gstack/.github/workflows/ci.yml

@@ -1,33 +0,0 @@
-name: CI
-
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-
-permissions:
-  contents: read
-
-jobs:
-  ci:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
-        with:
-          bun-version: 1.3.13
-
-      - name: Install dependencies
-        run: bun install --frozen-lockfile
-
-      - name: Typecheck
-        run: bun run typecheck
-
-      - name: Unit tests
-        run: bun run test
-
-      - name: Build
-        run: bun run build

gstack/.github/workflows/deploy.yml

@@ -1,52 +0,0 @@
-name: Deploy to GitHub Pages
-
-on:
-  push:
-    branches:
-      - main
-  workflow_dispatch:
-
-permissions:
-  contents: read
-  pages: write
-  id-token: write
-
-concurrency:
-  group: pages-deploy
-  cancel-in-progress: false
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
-        with:
-          bun-version: 1.3.13
-
-      - name: Install dependencies
-        run: bun install --frozen-lockfile
-
-      - name: Build
-        run: bun run build
-        env:
-          SITE_URL: https://tiennm99.github.io
-          SITE_BASE: /try-gstack
-
-      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
-        with:
-          path: ./dist
-
-  deploy:
-    needs: build
-    runs-on: ubuntu-latest
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4

gstack/astro.config.mjs

@@ -3,7 +3,7 @@ import tailwind from '@astrojs/tailwind';
 import sitemap from '@astrojs/sitemap';
 
 const siteUrl = process.env.SITE_URL ?? 'https://tiennm99.github.io';
-const basePath = process.env.SITE_BASE ?? '/try-gstack';
+const basePath = process.env.SITE_BASE ?? '/ai-coding-workflow-labs/gstack';
 
 export default defineConfig({
   site: siteUrl,