refactor: simplify today progress summary

frontend/src/App.vue

@@ -241,14 +241,10 @@ const activeName = computed(() => {
   if (activeView.value === 'settings') return '设置与数据'
   return lists.value.find((item) => item.id === activeList.value)?.name || '收集箱'
 })
-const todayCompletedTasks = computed(() => activeView.value === 'today' ? tasks.value.filter((task) => task.completed).length : 0)
-const todayOpenTasks = computed(() => activeView.value === 'today' ? Math.max(todayTaskTotal.value - todayTaskCompleted.value, 0) : 0)
 const todayHabitProgress = computed(() => `${todayHabitCompleted.value} / ${todayHabitTotal.value}`)
 const progressWidth = (completed: number, total: number) => `${total > 0 ? Math.min(100, Math.round(completed / total * 100)) : 0}%`
 const todayTaskProgressPercent = computed(() => progressWidth(todayTaskCompleted.value, todayTaskTotal.value))
 const todayHabitProgressPercent = computed(() => progressWidth(todayHabitCompleted.value, todayHabitTotal.value))
-const todayTaskProgressHint = computed(() => todayTaskTotal.value ? `还剩 ${todayOpenTasks.value} 件` : '今天暂无任务')
-const todayHabitProgressHint = computed(() => todayHabitTotal.value ? `还有 ${Math.max(todayHabitTotal.value - todayHabitCompleted.value, 0)} 项未完成` : '今天暂无习惯')
 function scrollTodaySection(id: 'today-tasks' | 'today-habits') {
   document.getElementById(id)?.scrollIntoView({ behavior: 'smooth', block: 'start' })
 }
@@ -256,12 +252,6 @@ function updateTodayHabitSummary(value: { total: number; completed: number }) {
   todayHabitTotal.value = value.total
   todayHabitCompleted.value = value.completed
 }
-const todayProgressText = computed(() => {
-  if (activeView.value !== 'today') return ''
-  if (!todayTaskTotal.value) return '今天还没有任务'
-  if (!todayOpenTasks.value) return '今天任务都清掉了'
-  return `还有 ${todayOpenTasks.value} 件事要处理`
-})
 const sourceTasks = computed(() => activeView.value === 'trash' ? trash.value : tasks.value)
 const visibleTasks = computed(() => {
   const now = new Date()
@@ -810,7 +800,7 @@ onMounted(bootstrap)
     <main>
       <header class="topbar" :class="{ 'today-topbar': activeView==='today' }">
         <button class="icon" :aria-label="(sidebarCollapsed ? '展开' : '收起') + '菜单'" :aria-expanded="sidebarCollapsed ? 'false' : 'true'" @click="toggleSidebar"><Menu /></button>
-        <div><h1>{{ activeName }}</h1><p v-if="activeView==='today'">{{ todayProgressText }}，慢慢来。</p></div>
+        <div><h1>{{ activeName }}</h1></div>
         <label v-if="['tasks','today','upcoming','trash'].includes(activeView)" class="search"><Search/><input v-model="query" placeholder="搜索任务…" aria-label="搜索任务"><kbd>⌘ K</kbd></label>
       </header>
       <template v-if="['habits','settings'].includes(activeView)">
@@ -820,11 +810,11 @@ onMounted(bootstrap)
       <template v-else>
         <section v-if="activeView==='today'" class="today-board" aria-label="今日进度">
           <button class="today-track today-task-track" type="button" aria-controls="today-tasks" @click="scrollTodaySection('today-tasks')">
-            <span class="today-track-head"><strong>任务 {{ todayTaskCompleted }} / {{ todayTaskTotal }}</strong><small>{{ todayTaskProgressHint }}</small></span>
+            <span class="today-track-head"><strong>任务 {{ todayTaskCompleted }} / {{ todayTaskTotal }}</strong></span>
             <span class="today-track-rail" role="progressbar" aria-label="今日任务进度" aria-valuemin="0" :aria-valuemax="todayTaskTotal" :aria-valuenow="todayTaskCompleted"><i class="today-track-fill" :style="{ width: todayTaskProgressPercent }" /></span>
           </button>
           <button class="today-track today-habit-track" type="button" aria-controls="today-habits" @click="scrollTodaySection('today-habits')">
-            <span class="today-track-head"><strong>习惯 {{ todayHabitProgress }}</strong><small>{{ todayHabitProgressHint }}</small></span>
+            <span class="today-track-head"><strong>习惯 {{ todayHabitProgress }}</strong></span>
             <span class="today-track-rail" role="progressbar" aria-label="今日习惯进度" aria-valuemin="0" :aria-valuemax="todayHabitTotal" :aria-valuenow="todayHabitCompleted"><i class="today-track-fill" :style="{ width: todayHabitProgressPercent }" /></span>
           </button>
         </section>
@@ -878,7 +868,6 @@ onMounted(bootstrap)
         </div></details>
         <div class="detail-actions"><button class="secondary" @click="saveTask">保存更改</button><button class="danger-text" @click="removeTask(selectedTask)"><Trash2/>移到回收站</button></div>
       </div>
-      <div v-else-if="activeView==='today'" class="paper today-summary"><ListTodo/><b>{{ todayProgressText }}</b><p>点左侧任务看详情；没任务时就从今天加一件小事开始。</p><div class="today-summary-grid"><span><strong>{{ todayOpenTasks }}</strong>待处理</span><span><strong>{{ todayCompletedTasks }}</strong>已完成</span></div></div>
       <div v-else class="paper"><ListChecks/><b>选中一个任务</b><p>日期、优先级、子任务和 Markdown 备注会出现在这里。</p></div>
     </aside>