feat: env badge in header, inline desc edit, clean up deps

- Header now shows Production/Development with color-coded dot via import.meta.env.PROD
- LinkDashboard: click-to-edit description inline (blur/Enter to save, Escape to cancel)
- LoginPage: fix Azure button label to English
- Remove unused motion and autoprefixer dependencies

src/components/LoginPage.tsx

@@ -165,7 +165,7 @@ export default function LoginPage({ onLogin, onNavigateToRegister, authError }:
                   <rect x="1" y="11" width="9" height="9" fill="#00A4EF" />
                   <rect x="11" y="11" width="9" height="9" fill="#FFB900" />
                 </svg>
-                Mit Microsoft anmelden
+                Sign In with Entra ID
               </button>
             </>
           )}