fix: compact today hidden tasks notice

frontend/src/App.vue

@@ -1379,7 +1379,8 @@ onUnmounted(() => {
             <span v-if="node.task.due_at" class="task-tail"><TaskDueDisplay :due-at="node.task.due_at" :due-has-time="node.task.due_has_time" :completed="node.task.completed" :now-ms="taskDueNowMs" /></span><span v-if="activeView==='trash'" class="task-actions"><button class="restore" @click.stop="restoreTask(node.task)"><ArchiveRestore/>恢复</button><button class="icon danger ghost" aria-label="永久删除" @click.stop="purgeTask(node.task)"><X/></button></span><span v-else class="task-actions"><button class="icon ghost task-detail-trigger" aria-label="打开任务详情" @click.stop="selectTask(node.task)"><Ellipsis/></button></span>
           </article>
         </template>
-        <div v-if="!visibleTasks.length&&!loading" class="empty"><ListTodo/><b>{{ query ? '没有匹配的任务' : hiddenCompletedTaskCount > 0 ? '已完成任务已隐藏' : '这里还很安静' }}</b><span>{{query?'换个关键词试试':hiddenCompletedTaskCount > 0 ? '开启“显示已完成”即可查看。':'写下第一件想完成的小事吧'}}</span><button v-if="activeView==='today' && !query && hiddenCompletedTaskCount === 0" class="soft-button empty-action" @click="openTaskCompose"><Plus/>添加今天任务</button></div>
+        <div v-if="activeView==='today' && !query && hiddenCompletedTaskCount > 0 && !visibleTasks.length && !loading" class="today-filtered-empty-note"><span>已隐藏已完成任务</span><button type="button" class="link" @click="showCompleted=true">显示</button></div>
+        <div v-else-if="!visibleTasks.length&&!loading" class="empty"><ListTodo/><b>{{ query ? '没有匹配的任务' : hiddenCompletedTaskCount > 0 ? '已完成任务已隐藏' : '这里还很安静' }}</b><span>{{query?'换个关键词试试':hiddenCompletedTaskCount > 0 ? '开启“显示已完成”即可查看。':'写下第一件想完成的小事吧'}}</span><button v-if="activeView==='today' && !query && hiddenCompletedTaskCount === 0" class="soft-button empty-action" @click="openTaskCompose"><Plus/>添加今天任务</button></div>
       </section>
       <div v-if="activeView==='today'" id="today-habits" class="today-section-anchor">
         <h3 class="section-heading"><Repeat2/>习惯</h3>

frontend/src/style.test.ts

@@ -727,6 +727,15 @@ describe('task and habit row decoration', () => {
     expect(css).not.toContain('.habit-toolbar{')
   })
 
+  it('uses a compact hidden-completed notice only on Today', () => {
+    expect(app).toContain("v-if=\"activeView==='today' && !query && hiddenCompletedTaskCount > 0 && !visibleTasks.length && !loading\" class=\"today-filtered-empty-note\"")
+    expect(app).toContain('已隐藏已完成任务')
+    expect(app).toContain('@click="showCompleted=true">显示</button>')
+    expect(app).toContain("v-else-if=\"!visibleTasks.length&&!loading\" class=\"empty\"")
+    expect(css).toContain('.today-filtered-empty-note{min-height:48px;')
+    expect(css).toContain('@media(max-width:930px){.today-filtered-empty-note{min-height:44px;')
+  })
+
   it('distinguishes hidden completed items from true and search empty states', () => {
     expect(app).toContain('const hiddenCompletedTaskCount = ref(0)')
     expect(app).toContain("query ? '没有匹配的任务' : hiddenCompletedTaskCount > 0 ? '已完成任务已隐藏' : '这里还很安静'")