fix: 保持产品名称和标语使用英文

- 添加 app.productName 和 app.tagline 翻译键
- 所有语言文件中都保持英文
- SearchView 使用翻译函数显示
- 确保不会被错误翻译

src/locales/en.json

@@ -444,5 +444,9 @@
       "users": "Users",
       "shares": "Shares"
     }
+  },
+  "app": {
+    "productName": "Momentry Studio",
+    "tagline": "Turn Every Moment Into Intelligence"
   }
 }

src/locales/ja.json

@@ -444,5 +444,9 @@
       "users": "ユーザー",
       "shares": "共有"
     }
+  },
+  "app": {
+    "productName": "Momentry Studio",
+    "tagline": "Turn Every Moment Into Intelligence"
   }
 }

src/locales/zh-TW.json

@@ -444,5 +444,9 @@
       "users": "用戶",
       "shares": "共享"
     }
+  },
+  "app": {
+    "productName": "Momentry Studio",
+    "tagline": "Turn Every Moment Into Intelligence"
   }
 }

src/views/SearchView.vue

@@ -73,8 +73,8 @@
       <div class="chat" id="msChat" ref="messagesEl" :class="{ 'chat--empty': !messages.length }" @mouseup="onChatMouseUp">
         <template v-if="!messages.length">
           <header class="ms-hero">
-            <h1 class="ms-title">Momentry Studio</h1>
+            <h1 class="ms-title">{{ $t('app.productName') }}</h1>
-            <p class="ms-subtitle">Turn Every Moment Into Intelligence</p>
+            <p class="ms-subtitle">{{ $t('app.tagline') }}</p>
           </header>
           <div class="ibar ibar--hero">
             <div class="iwrap">