feat: Add admin-ui build step to dss-setup.sh

- Build production bundle during setup
- Use --legacy-peer-deps for npm install
- Ensures dist/ is ready for deployment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

scripts/dss-setup.sh

@@ -93,11 +93,18 @@ log_ok "Python venv ready"
 # Check admin-ui node_modules
 if [ ! -d "$DSS_ROOT/admin-ui/node_modules" ]; then
   log_info "Installing admin-ui dependencies..."
-  cd "$DSS_ROOT/admin-ui" && npm install
+  cd "$DSS_ROOT/admin-ui" && npm install --legacy-peer-deps
   cd "$DSS_ROOT"
 fi
 log_ok "Node dependencies ready"
 
+# Build admin-ui for production
+log_info "Building admin-ui for production..."
+cd "$DSS_ROOT/admin-ui"
+npm run build 2>&1 | tail -5
+cd "$DSS_ROOT"
+log_ok "admin-ui built (dist/)"
+
 echo ""
 
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