fix(owner-tools): resolve merge conflict and fix UnoCSS build

- Use UnoCSS CLI to pre-generate CSS for production build
- Add prebuild script to generate uno-generated.css
- Alias to virtual:uno.css in dev mode for HMR
- Remove UnoCSS vite plugin from build (only use in dev)

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

frontends/owner-tools/vite.config.ts

@@ -47,6 +47,6 @@ export default defineConfig(({ command }) => ({
       fileName: () => 'owner-tools.js'
     },
     outDir: '../../internal/tenant/assets/js',
-    emptyOutDir: false,
+    emptyOutDir: false
   }
 }))