diff --git a/web/src/components/AppLayout.vue b/web/src/components/AppLayout.vue
index 2a8ecb8..4460d7c 100644
--- a/web/src/components/AppLayout.vue
+++ b/web/src/components/AppLayout.vue
@@ -27,6 +27,8 @@ const selectedArticleId = ref('')
 const appTitle = ref('')
 const chatOpen = ref(false)
 const showSettings = ref(false)
+declare const __BUILD_DATE__: string
+const buildDate = __BUILD_DATE__
 const showUserMenu = ref(false)
 const editingTitle = ref(false)
 const titleInput = ref('')
@@ -399,6 +401,9 @@ function goHome() {
         <ChatPanel />
       </aside>
     </div>
+    <footer class="app-footer">
+      <span>Built {{ buildDate }}</span>
+    </footer>
   </div>
 </template>
 
@@ -636,4 +641,17 @@ function goHome() {
   background: var(--bg-secondary);
   overflow: hidden;
 }
+
+.app-footer {
+  height: 24px;
+  min-height: 24px;
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  padding: 0 16px;
+  font-size: 11px;
+  color: var(--text-tertiary, #888);
+  border-top: 1px solid var(--border);
+  background: var(--bg-primary);
+}
 </style>
diff --git a/web/vite.config.ts b/web/vite.config.ts
index e9c83ee..fa6fe4e 100644
--- a/web/vite.config.ts
+++ b/web/vite.config.ts
@@ -3,6 +3,9 @@ import vue from '@vitejs/plugin-vue'
 
 export default defineConfig({
   base: process.env.VITE_BASE_PATH || '/tori/',
+  define: {
+    __BUILD_DATE__: JSON.stringify(new Date().toISOString().slice(0, 10)),
+  },
   plugins: [vue()],
   server: {
     proxy: {