Archive Azure docs, drop GH Pages CNAME deploy, and tighten repo hygiene.

Move legacy deployment guides to docs/archive/azure-deprecated/, replace auto GitHub Pages with artifact upload plus optional pages-preview workflow, update architecture diagram and doc index, and ignore Lighthouse temp artifacts.

Co-authored-by: Cursor <[email protected]>

.github/workflows/deploy.yml

@@ -1,5 +1,9 @@
 name: Build and Deploy
 
+# Validates on PR and main; uploads build artifact on main.
+# Production traffic: Proxmox VMID 7810 (see docs/deployment/PROXMOX_DEPLOYMENT.md).
+# GitHub Pages is NOT canonical for mim4u.org — do not set CNAME to mim4u.org here.
+
 on:
   push:
     branches: [main]
@@ -10,16 +14,12 @@ jobs:
   validate:
     uses: ./.github/workflows/validate.yml
 
-  deploy:
+  artifact:
+    name: Upload build artifact
     needs: validate
     runs-on: ubuntu-latest
     if: github.ref == 'refs/heads/main' && github.event_name == 'push'
 
-    permissions:
-      contents: write
-      pages: write
-      id-token: write
-
     steps:
       - uses: actions/checkout@v4
 
@@ -40,9 +40,10 @@ jobs:
         env:
           VITE_APP_VERSION: ${{ github.sha }}
 
-      - name: Deploy to GitHub Pages
-        uses: peaceiris/actions-gh-pages@v4
+      - name: Upload dist artifact
+        uses: actions/upload-artifact@v4
         with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./dist
-          cname: mim4u.org
+          name: dist-main-${{ github.sha }}
+          path: dist/
+          if-no-files-found: error
+          retention-days: 14