Merge branch 'feat/initial-build' into main

Brings in the CI infrastructure fixes:
- ci.yml: probe Chromium binary; fall back to Playwright (95977c8)
- tailwind: lift text-faint to meet WCAG AA contrast (2fde385)
- deploy.yml: pin artifact actions to v3 for Gitea (bbd68ec)

.gitea/workflows/deploy.yml

@@ -61,8 +61,11 @@ jobs:
             exit 1
           fi
 
+      # Pin to v3 — Gitea Actions implements the v3 artifact protocol.
+      # upload/download-artifact@v4 talk to a github.com-only backend and
+      # fail with GHESNotSupportedError on Gitea / Forgejo / GHES.
       - name: Upload dist artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: dist
           path: dist/
@@ -75,7 +78,7 @@ jobs:
 
     steps:
       - name: Download dist artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: dist
           path: dist/