fix: remove standalone data import tool

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, Trash2, Upload, X } from 'lucide-vue-next'
+import { Activity, ArchiveRestore, Check, Download, FileJson, GripVertical, LogOut, Trash2, 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'
@@ -22,8 +22,6 @@ const habitComposerOpen = ref(false)
 const habitComposeOrigin = ref({ x: window.innerWidth - 43, y: window.innerHeight - 104 })
 const habitComposeStyle = computed(() => ({ '--fab-origin-x': `${habitComposeOrigin.value.x}px`, '--fab-origin-y': `${habitComposeOrigin.value.y}px` }))
 const habitNameInput = ref<HTMLInputElement | null>(null)
-const importFile = ref<File | null>(null)
-const importPreview = ref<any>(null)
 const restoreFile = ref<File | null>(null)
 const currentPassword = ref('')
 const newPassword = ref('')
@@ -312,21 +310,6 @@ function downloadBlob(blob: Blob, name: string) {
   const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = name; a.click(); setTimeout(() => URL.revokeObjectURL(url), 1000)
 }
 async function exportData() { await safe(async () => downloadBlob(await request('/export') as Blob, 'dodo-export.json')) }
-async function previewImport() {
-  if (!importFile.value) return
-  await safe(async () => {
-    const form = new FormData(); form.append('file', importFile.value!)
-    importPreview.value = await request('/import/ticktick/preview', { method: 'POST', body: form })
-  })
-}
-async function confirmImport() {
-  await safe(async () => {
-    const form = new FormData(); form.append('file', importFile.value!)
-    const result = await request('/import/ticktick', { method: 'POST', body: form }) as { imported?: number; skipped?: number }
-    importPreview.value = null
-    emit('changed'); emit('notice', `导入完成：新增 ${result?.imported ?? 0}，跳过 ${result?.skipped ?? 0}`)
-  })
-}
 async function restore() {
   if (!restoreFile.value) return
   if (!confirm('恢复为合并模式，将导入 JSON 中的清单与任务。继续吗？')) return
@@ -435,7 +418,6 @@ onBeforeUnmount(() => {
       </header>
       <div class="settings-grid">
         <article class="tool-card"><FileJson /><h3>数据导出与恢复</h3><p>下载完整 JSON 备份，或从备份恢复。</p><button class="soft-button" @click="exportData"><Download />导出 JSON</button><label class="file-button"><ArchiveRestore />选择备份<input type="file" accept="application/json" @change="restoreFile=($event.target as HTMLInputElement).files?.[0]||null"></label><button v-if="restoreFile" class="danger-button" @click="restore">确认恢复</button></article>
-        <article class="tool-card"><Upload /><h3>导入</h3><p>先预览变化，确认后才写入。</p><label class="file-button">选择文件<input type="file" accept=".json,.csv" @change="importFile=($event.target as HTMLInputElement).files?.[0]||null"></label><button :disabled="!importFile" class="soft-button" @click="previewImport">生成预览</button><pre v-if="importPreview">{{ JSON.stringify(importPreview, null, 2) }}</pre><button v-if="importPreview" class="primary-small" @click="confirmImport">确认导入</button></article>
         <article class="tool-card password-card"><Activity /><h3>修改密码</h3><p>修改后当前设备保持登录，其他设备会自动退出。</p><form class="password-form" @submit.prevent="changePassword"><label>当前密码<input v-model="currentPassword" type="password" autocomplete="current-password" required aria-label="当前密码"></label><label>新密码<input v-model="newPassword" type="password" autocomplete="new-password" minlength="12" required aria-label="新密码" placeholder="至少 12 位"></label><label>确认新密码<input v-model="confirmPassword" type="password" autocomplete="new-password" minlength="12" required aria-label="确认新密码"></label><p v-if="passwordError" class="inline-error" role="alert">{{passwordError}}</p><button class="primary-small" :disabled="passwordBusy || !currentPassword || !newPassword || !confirmPassword">{{passwordBusy?'正在修改…':'修改密码'}}</button></form></article>
         <article class="tool-card wide"><LogOut /><h3>登录会话</h3><div v-for="s in sessions" :key="s.id" class="session-row"><span><b>{{ s.current ? '当前设备' : '其他设备' }}</b><small>{{ s.user_agent || '未知设备' }} · {{ s.last_seen_at || s.created_at }}</small></span><button v-if="!s.current" class="danger-text" @click="revoke(s.id)">撤销</button></div><p v-if="!sessions.length">没有可显示的会话。</p></article>
         <article v-if="audit.length" class="tool-card wide"><Activity /><h3>最近活动</h3><div v-for="(row, i) in audit" :key="row.id || i" class="audit-row"><span>{{ row.action || row.event || '变更' }}</span><small>{{ row.created_at || row.timestamp }}</small></div></article>