architecture: 数据唯一权威迁至服务器——本地降级为实时缓存，写后即时推送+快照重建；账号登录转为云端原生（新增 /api/auth/password、/api/auth/delete、每日自动备份）

intern-log/src/views/LoginView.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
-import { onMounted, ref } from 'vue'
+import { ref } from 'vue'
 import Icon from '../components/Icon.vue'
-import { createUser, legacyDataExists, login, type Session } from '../db/auth'
+import { createUser, login, type Session } from '../db/auth'
 
 const emit = defineEmits<{ (e: 'login', s: Session): void }>()
 
@@ -9,15 +9,9 @@ const mode = ref<'login' | 'create'>('login')
 const username = ref('')
 const password = ref('')
 const password2 = ref('')
-const migrate = ref(true)
-const legacyExists = ref(false)
 const error = ref('')
 const busy = ref(false)
 
-onMounted(async () => {
-  legacyExists.value = await legacyDataExists()
-})
-
 function switchMode(m: 'login' | 'create') {
   mode.value = m
   error.value = ''
@@ -43,7 +37,7 @@ async function submit() {
         busy.value = false
         return
       }
-      s = await createUser(username.value, password.value, migrate.value)
+      s = await createUser(username.value, password.value)
     }
     emit('login', s)
   } catch (e) {
@@ -60,7 +54,7 @@ async function submit() {
         <div class="brand-icon"><Icon name="calendar" :size="22" /></div>
         <div class="login-title">实习工作日志</div>
         <div class="muted login-sub">打卡 · 记录 · 总结 · 备忘录 · 密码库</div>
-        <div class="muted login-sub">每位用户独立数据库，数据彼此隔离并保存在本机</div>
+        <div class="muted login-sub">数据保存在云端服务器，所有设备登录同一账号即可实时同步</div>
       </div>
       <div class="seg">
         <button class="seg-btn" :class="{ active: mode === 'login' }" @click="switchMode('login')">登录</button>
@@ -69,16 +63,12 @@ async function submit() {
       <input class="input" v-model="username" placeholder="用户名（2 到 20 个字符）" @keydown.enter="submit" />
       <input type="password" class="input" v-model="password" :placeholder="mode === 'login' ? '登录密码' : '设置登录密码（至少 6 位）'" @keydown.enter="submit" />
       <input v-if="mode === 'create'" type="password" class="input" v-model="password2" placeholder="再次输入密码" @keydown.enter="submit" />
-      <label v-if="mode === 'create' && legacyExists" class="mig-row">
-        <input type="checkbox" v-model="migrate" />
-        <span>导入本机原有工作日志数据到此用户（原数据保留不删除）</span>
-      </label>
       <div v-if="error" class="form-error">{{ error }}</div>
       <button class="btn btn-primary login-btn" :disabled="busy" @click="submit">
         {{ mode === 'login' ? '登录' : '创建并进入' }}
       </button>
       <div class="muted login-note">
-        登录后自动开启云端同步（密码会保存在本机用于云同步）；系统只保存密码哈希，忘记密码将无法访问该用户数据
+        登录密码仅服务器保存哈希；本机保存加密的自动登录凭据，登录后无需重复输入
       </div>
     </div>
   </div>

intern-log/src/views/SettingsView.vue

@@ -13,6 +13,7 @@ import { downloadCsv } from '../lib/csv'
 import { hhmm, parseDateStr, todayStr } from '../lib/date'
 import { computeDay } from '../domain/attendance'
 import { changeLoginPassword, deleteCurrentUser, getSession } from '../db/auth'
+import { setSyncBaseOverride } from '../lib/server'
 import { ensureCloudBinding, getSyncBase, getSyncLastTime, isSyncConfigured, syncWithStoredConfig, syncLastError, type SyncResult } from '../sync/engine'
 import { getCloudCreds } from '../db/auth'
 import { showToast } from '../lib/toast'
@@ -55,7 +56,7 @@ watch(syncLastError, v => { autoSyncErr.value = v })
 
 
 async function saveSyncConfig() {
-  await setSetting('sync_base_url', syncBase.value.trim())
+  await setSyncBaseOverride(syncBase.value.trim())
   showToast('同步地址已保存')
 }
 
@@ -351,7 +352,7 @@ async function doImport() {
 
     <div class="card section">
       <div class="section-title">多端数据同步</div>
-      <div class="muted acc-line">云端账号：{{ cloudUser || '未绑定' }} · 登录即自动绑定并同步（变更实时推送 + 每 5 分钟兜底）；密码库以密文同步，主密码永不出本机</div>
+      <div class="muted acc-line">云端账号：{{ cloudUser || '未绑定' }} · 数据仅保存在服务器，本机只是实时缓存（变更 ~3 秒推上云端 + 其他端秒级自动刷新）；密码库同步密文，主密码永不出本机</div>
       <div class="rule-item">
         <label>同步服务地址（默认即可）</label>
         <input class="input" v-model="syncBase" placeholder="https://daywk.linyux.cn" />
@@ -416,7 +417,7 @@ async function doImport() {
     <ConfirmDialog
       :open="deleteAccConfirm"
       title="删除用户确认"
-      :message="'将永久删除用户「' + username + '」及其全部数据：工作日志、考勤、备忘录、账号密码库都将被清除，且不可恢复。请确认。'"
+      :message="'将永久删除云端账号「' + username + '」及其服务器上的全部数据：工作日志、考勤、备忘录、账号密码库都将被清除，任何设备都无法再取回，且不可恢复。请确认。'"
       confirm-text="永久删除" danger
       @cancel="deleteAccConfirm = false"
       @confirm="doDeleteAccount"