fix: remove habit refresh action

frontend/src/MvpPanel.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { computed, nextTick, onBeforeUnmount, onMounted, ref } from 'vue'
-import { Activity, ArchiveRestore, Check, Download, FileJson, GripVertical, LogOut, RefreshCw, Trash2, Upload, X } from 'lucide-vue-next'
+import { Activity, ArchiveRestore, Check, Download, FileJson, GripVertical, LogOut, Trash2, Upload, X } from 'lucide-vue-next'
 import { moveItemWithinScope } from './lib/task-utils'
 import { dateKey, habitButtonValue, isHabitComplete, isHabitScheduledToday, mergePage, nextHabitSwipeValue, previousHabitSwipeValue, readHabitGridCache, shouldToggleRowSwipe, writeHabitGridCache } from './lib/mvp-utils'
 import { csrfHeader } from './lib/csrf'
@@ -385,7 +385,7 @@ onBeforeUnmount(() => {
     <template v-if="view === 'habits' || view === 'today-habits'">
       <header v-if="view === 'habits'" class="view-intro">
         <div><small>把想坚持的事，变成每天的日常</small><h2>习惯</h2></div>
-        <div class="habit-toolbar"><label><input v-model="hideCompletedHabits" type="checkbox"> 隐藏已完成</label><button class="soft-button" @click="loadHabits"><RefreshCw />刷新</button></div>
+        <div class="habit-toolbar"><label><input v-model="hideCompletedHabits" type="checkbox"> 隐藏已完成</label></div>
       </header>
 
       <!-- 今日习惯：只展示“今天该做”的习惯，复用正式习惯行样式 -->