diff --git a/src/globals.d.ts b/src/globals.d.ts
new file mode 100644
index 0000000..a6bd98f
--- /dev/null
+++ b/src/globals.d.ts
@@ -0,0 +1,2 @@
+declare const __BUILD_HASH__: string
+declare const __BUILD_TIME__: string
diff --git a/src/pages/auth/LoginPage.tsx b/src/pages/auth/LoginPage.tsx
index 2ac84ef..0de60fd 100644
--- a/src/pages/auth/LoginPage.tsx
+++ b/src/pages/auth/LoginPage.tsx
@@ -216,7 +216,7 @@ export function LoginPage() {
             <div className="h-9 w-9 rotate-45 rounded-lg bg-white/90" />
           </div>
           <h2 className="mb-4 text-3xl font-bold tracking-tight text-white">
-            Yimaru Academy
+            Yimaru Academy Test Mode
           </h2>
           <p className="text-base leading-relaxed text-white/70">
             Manage your academy, track student progress, and streamline
@@ -401,11 +401,15 @@ export function LoginPage() {
           </form>
 
           {/* Footer */}
-          <p className="mt-10 text-center text-xs text-grayScale-400">
-            © {new Date().getFullYear()} Yimaru Academy · All rights reserved
-          </p>
+          <div className="mt-10 text-center text-xs text-grayScale-400">
+            <p>© {new Date().getFullYear()} Yimaru Academy · All rights reserved</p>
+            <p className="mt-1 font-mono text-[10px] text-grayScale-300">
+              v{__BUILD_HASH__} · {new Date(__BUILD_TIME__).toLocaleDateString()}
+            </p>
+          </div>
         </div>
       </div>
     </div>
   );
 }
+
diff --git a/vite.config.ts b/vite.config.ts
index 8463f7b..58276bf 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,8 +1,21 @@
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
+import { execSync } from 'child_process'
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react()],
+  define: {
+    __BUILD_HASH__: JSON.stringify(
+      (() => {
+        try {
+          return execSync('git rev-parse --short HEAD').toString().trim()
+        } catch {
+          return 'unknown'
+        }
+      })()
+    ),
+    __BUILD_TIME__: JSON.stringify(new Date().toISOString()),
+  },
 })