fix(mobile): drive learning search from assignments

mobile-uni/src/pages/user/cases/index.vue

@@ -1,7 +1,19 @@
 <template>
   <view class="page cases-page">
-    <text class="page-title">案例素材</text>
-    <text class="page-subtitle">把一线语音整理成可复用培训案例。上传后依次完成 ASR、AI 整理和入库。</text>
+    <view class="subpage-header">
+      <button
+        class="subpage-back-button"
+        aria-label="返回今日"
+        title="返回今日"
+        @click="navigateBackToToday"
+      >
+        ←
+      </button>
+      <view class="subpage-heading">
+        <text class="page-title">案例素材</text>
+        <text class="page-subtitle">把一线语音整理成可复用培训案例。上传后依次完成 ASR、AI 整理和入库。</text>
+      </view>
+    </view>
 
     <view v-if="message" class="status-message">{{ message }}</view>
 
@@ -85,7 +97,7 @@ import { onShow } from '@dcloudio/uni-app';
 import type { CaseCurateResponse, CaseOrganizeResponse, CaseRecord, CaseSelectedFile, CaseUploadResponse } from '@/types/api';
 import { chooseCaseAudio, curateCase, getCaseRecords, organizeCase, uploadCaseAudio } from '@/services/case';
 import { isLoggedIn, rememberLoginRedirect } from '@/services/auth';
-import { resetPageScroll } from '@/services/navigation';
+import { navigateBackToToday, resetPageScroll } from '@/services/navigation';
 import { ensureEmployeePosition } from '@/services/position';
 
 const loggedIn = ref(false);