feat(multicloud): 补齐上线前的多云管理缺口（适配器/动作层/DNS/定时同步）

评估发现项目只有台账能力，缺失真正的多云管理链路。本次按缺口逐项补齐：

适配层
- 新增 aws / linode / namesilo 适配器，registry 登记；阿里云、腾讯云补
  list_domains 与 get_account 余额
- NormalizedVPS 补 expiry_date + charge_type：此前云端同步进来的 VPS 拿不到
  到期日，永远进不了续费提醒——而续费提醒正是这套台账存在的理由
- base.py 统一云端错误可读化（http_error_message / cloud_error_text）：各厂商
  把原因放的位置都不同（Linode errors[].reason、Cloudflare errors[].message、
  腾讯 Response.Error.Message、AWS XML），此前直接 str(e) 会把 httpx 的多行文本
  连同 MDN 链接弹给用户

动作层与 DNS
- 新增 /api/actions：实例启停/重启/续费，写操作全部二次确认 + 审计
- 新增 Cloudflare DNS 记录的增删改查

定时同步
- scripts/sync_all_assets.py + /api/sync/assets + vps-sync-assets.timer(08:30)
- 08:30 而非随机时刻：必须早于 09:00 的续费检查，否则提醒读到上一天的旧到期日
- sync_all_assets 修正计数：每一项子同步都失败时不再计为「成功」，否则凭证过期
  会显示「成功 1」，用户以为数据拉到了、实际一条没有

数据一致性
- AssetRead 输出 external_id（只出不进）：前端「云操作」「DNS」按钮靠它渲染，
  缺了则所有按钮永远出不来
- import_assets 落库 external_id：导出带了去重键而导入丢弃，会让迁移后首次同步
  把所有云端资产当新增再建一份
- _align_preset_providers 取代 _backfill_provider_services：库里声明但注册表未
  实现的 sdk_type 清空（声明支持却不支持，比明说不支持更糟），services 只增量
  补标签不覆盖，用户自建平台不动

前端如实展示
- cost 为 0 统一显示「未填」而非「0 USD」：0 既可能是没填、也可能是云端不返回
  价格，而汇总处又把 0 当「无费用」排除，两处口径不一致
- 总览「本年支出」增加 year_cost_missing，把合计的覆盖缺口说出来
- DNS 弹窗补 MX/SRV 优先级与备注；列表请求失败时 provider 用资产自带 slug 兜底，
  否则 Cloudflare 代理勾选框永远不出现

测试：257 -> 309 passed

static/js/views/assets.js

@@ -31,6 +31,7 @@ const AssetsView = {
           <option v-for="(l,k) in Fmt.STATUS_LABELS" :key="k" :value="k">{{ l }}</option>
         </select>
         <button v-if="store.assetTab===''" @click="syncAllAI" class="text-sm px-3 py-1.5 rounded-lg border border-violet-300 dark:border-violet-700 text-violet-600 dark:text-violet-400 hover:bg-violet-50 dark:hover:bg-violet-900/20">同步AI余额</button>
+        <button v-if="store.assetTab==='' || store.assetTab==='vps'" @click="syncAllAssets" class="text-sm px-3 py-1.5 rounded-lg border border-emerald-300 dark:border-emerald-700 text-emerald-600 dark:text-emerald-400 hover:bg-emerald-50 dark:hover:bg-emerald-900/20" title="拉取所有已配 API 凭证账号下的云端 VPS 与域名">同步云端资产</button>
         <span class="ml-auto text-xs text-slate-400">共 {{ list.length }} 条</span>
       </div>
 
@@ -55,10 +56,11 @@ const AssetsView = {
               <td class="px-4 py-2.5"><span class="text-xs px-2 py-0.5 rounded-full" :class="Fmt.typeBadge(a.asset_type)">{{ Fmt.TYPE_LABELS[a.asset_type] }}</span></td>
               <td class="px-4 py-2.5 text-slate-500">{{ a.provider_name || a.provider }}</td>
               <td class="px-4 py-2.5" :class="Fmt.expiryText(a.days_to_expiry)">{{ a.expiry_date || '—' }}<span v-if="a.days_to_expiry!==null && a.days_to_expiry!==undefined" class="text-xs ml-1">({{ Fmt.countdownText(a.days_to_expiry, { unit: '' }) }})</span></td>
-              <td class="px-4 py-2.5 text-slate-600 dark:text-slate-300">{{ a.cost }} {{ a.currency }}<span v-if="a.renewal_cycle" class="text-xs text-slate-400 ml-1">/{{ Fmt.CYCLE_LABELS[a.renewal_cycle] || a.renewal_cycle }}</span></td>
+              <td class="px-4 py-2.5" :class="a.cost ? 'text-slate-600 dark:text-slate-300' : 'text-slate-400'">{{ Fmt.costText(a.cost, a.currency) }}<span v-if="a.cost && a.renewal_cycle" class="text-xs text-slate-400 ml-1">/{{ Fmt.CYCLE_LABELS[a.renewal_cycle] || a.renewal_cycle }}</span></td>
               <td class="px-4 py-2.5"><span class="text-xs px-2 py-0.5 rounded-full" :class="Fmt.statusBadge(a.status)">{{ Fmt.STATUS_LABELS[a.status] }}</span></td>
               <td class="px-4 py-2.5 text-right whitespace-nowrap">
                 <button v-if="a.asset_type==='vps'" @click="viewServer(a)" class="text-emerald-600 dark:text-emerald-400 hover:underline mr-3 text-xs">监控</button>
+                <button v-if="canControl(a)" @click="openAct(a)" class="text-amber-600 dark:text-amber-400 hover:underline mr-3 text-xs" title="远程开机/关机/重启/续费">云操作</button>
                 <button v-if="a.asset_type==='ai_agent'" @click="refreshBalance(a)" class="text-violet-600 dark:text-violet-400 hover:underline mr-3 text-xs">刷新余额</button>
                 <button @click="edit(a)" class="text-blue-600 dark:text-blue-400 hover:underline mr-3 text-xs">编辑</button>
                 <button @click="del(a)" class="text-red-600 dark:text-red-400 hover:underline text-xs">删除</button>
@@ -81,11 +83,12 @@ const AssetsView = {
           </div>
           <div class="flex items-center gap-3 mt-2 text-xs">
             <span :class="Fmt.expiryText(a.days_to_expiry)">{{ a.expiry_date || '无到期' }}<span v-if="a.days_to_expiry!==null&&a.days_to_expiry!==undefined"> ({{ Fmt.countdownText(a.days_to_expiry, { unit: '' }) }})</span></span>
-            <span class="text-slate-500">{{ a.cost }}{{ a.currency }}</span>
+            <span :class="a.cost ? 'text-slate-500' : 'text-slate-400'">{{ Fmt.costText(a.cost, a.currency) }}</span>
             <span class="px-2 py-0.5 rounded-full" :class="Fmt.statusBadge(a.status)">{{ Fmt.STATUS_LABELS[a.status] }}</span>
           </div>
           <div class="flex gap-4 mt-2 pt-2 border-t border-slate-100 dark:border-slate-800 text-xs">
             <button v-if="a.asset_type==='vps'" @click="viewServer(a)" class="text-emerald-600 dark:text-emerald-400">监控</button>
+            <button v-if="canControl(a)" @click="openAct(a)" class="text-amber-600 dark:text-amber-400">云操作</button>
             <button v-if="a.asset_type==='ai_agent'" @click="refreshBalance(a)" class="text-violet-600 dark:text-violet-400">刷新余额</button>
             <button @click="edit(a)" class="text-blue-600 dark:text-blue-400">编辑</button>
             <button @click="del(a)" class="text-red-600 dark:text-red-400">删除</button>
@@ -156,6 +159,23 @@ const AssetsView = {
         await loadAssets();
       } catch (e) { alert('同步失败：' + e.message); }
     }
-    return { store, Fmt, tabs, tabView, list, switchTab, providerName, reload: loadAssets, clearProvider: clearProviderFilter, edit: openAssetEdit, del: deleteAsset, viewServer, refreshBalance, syncAllAI };
+    async function syncAllAssets() {
+      if (!confirm('从云端拉取所有已配 API 凭证账号下的 VPS 与域名？\n\n会按 (平台, 云端实例ID) 去重：已存在则更新状态/到期日，不存在则新建。')) return;
+      try {
+        const r = await Api.post('/sync/assets', {});
+        const lines = [
+          '同步完成：成功 ' + r.success + '，失败 ' + r.failed,
+          '新增 ' + r.created + '，更新 ' + r.updated,
+        ];
+        // 未配凭证 / 平台无适配器属于「跳过」而非失败，但必须如实报出来，
+        // 否则用户以为同步过了、实际一条都没拉
+        if (r.skipped_no_config) lines.push('跳过（账号未配 API 凭证）：' + r.skipped_no_config);
+        if (r.skipped_no_adapter) lines.push('跳过（平台无可用适配器）：' + r.skipped_no_adapter);
+        if (r.errors && r.errors.length) lines.push('\n' + r.errors.join('\n'));
+        alert(lines.join('\n'));
+        await Promise.all([loadAssets(), loadOverview()]);
+      } catch (e) { alert('同步失败：' + e.message); }
+    }
+    return { store, Fmt, tabs, tabView, list, switchTab, providerName, reload: loadAssets, clearProvider: clearProviderFilter, edit: openAssetEdit, del: deleteAsset, viewServer, refreshBalance, syncAllAI, syncAllAssets, canControl: assetCanControl, openAct: openActions };
   },
 };

static/js/views/dashboard.js

@@ -17,6 +17,8 @@ const DashboardView = {
       <button type="button" @click="goYearCost" title="点击查看付费资产汇总" class="text-left bg-white dark:bg-slate-900 rounded-xl p-4 border border-slate-200 dark:border-slate-800 hover:border-blue-400 dark:hover:border-blue-600 transition">
         <div class="text-xs text-slate-500">本年支出</div>
         <div class="text-2xl font-bold mt-1">{{ store.overview.year_cost || 0 }}</div>
+        <!-- 合计只统计填了费用的资产，缺口必须说出来：否则这个数看着像准数、实际是下限 -->
+        <div v-if="store.overview.year_cost_missing" class="text-[11px] mt-1 text-amber-600 dark:text-amber-400">另有 {{ store.overview.year_cost_missing }} 项未填费用，实际更高</div>
       </button>
       <button type="button" @click="goAbnormal" title="点击查看已停止/已过期的资产" class="text-left bg-white dark:bg-slate-900 rounded-xl p-4 border border-amber-200 dark:border-amber-900/50 hover:border-amber-400 dark:hover:border-amber-700 transition">
         <div class="text-xs text-slate-500">异常状态</div>

static/js/views/domains.js

@@ -39,6 +39,7 @@ const DomainsView = {
               <td class="px-4 py-2.5"><span class="text-xs px-2 py-0.5 rounded-full" :class="a.domain_detail.is_using ? 'bg-emerald-500/10 text-emerald-600 dark:text-emerald-400' : 'bg-slate-500/10 text-slate-400'">{{ a.domain_detail.is_using ? '使用' : '闲置' }}</span></td>
               <td class="px-4 py-2.5 text-right whitespace-nowrap">
                 <button @click="toggle(a)" class="text-indigo-600 dark:text-indigo-400 hover:underline mr-3 text-xs">{{ expanded[a.id] ? '收起' : '子域名' }}</button>
+                <button v-if="canDns(a)" @click="openDnsPanel(a)" class="text-emerald-600 dark:text-emerald-400 hover:underline mr-3 text-xs" title="直接管理云端 DNS 解析记录">DNS</button>
                 <button @click="edit(a)" class="text-blue-600 dark:text-blue-400 hover:underline text-xs">编辑/绑定</button>
               </td>
             </tr>
@@ -164,6 +165,6 @@ const DomainsView = {
       if (d <= 90) return 'bg-emerald-500/10 text-emerald-600 dark:text-emerald-400';
       return 'bg-slate-500/10 text-slate-500';
     }
-    return { store, Fmt, domains, subsByAsset, sslByAsset, expanded, forms, domainName, fullHost, toggle, resetForm, startEdit, saveSub, delSub, probeSsl, certText, certBadge, edit: openAssetEdit };
+    return { store, Fmt, domains, subsByAsset, sslByAsset, expanded, forms, domainName, fullHost, toggle, resetForm, startEdit, saveSub, delSub, probeSsl, certText, certBadge, edit: openAssetEdit, canDns: assetCanDns, openDnsPanel: openDns };
   },
 };

static/js/views/monitor.js

@@ -83,7 +83,7 @@ const MonitorView = {
             <td class="px-4 py-2.5 text-slate-500">{{ a.provider_name || a.provider }}</td>
             <td class="px-4 py-2.5">{{ a.expiry_date }}</td>
             <td class="px-4 py-2.5"><span class="text-xs font-semibold px-2 py-0.5 rounded-full" :class="countdownBadge(a.days_to_expiry)">{{ countdownText(a.days_to_expiry) }}</span></td>
-            <td class="px-4 py-2.5 text-slate-600 dark:text-slate-300">{{ a.cost }} {{ a.currency }}<span v-if="a.renewal_cycle" class="text-xs text-slate-400 ml-1">/{{ Fmt.CYCLE_LABELS[a.renewal_cycle] || a.renewal_cycle }}</span></td>
+            <td class="px-4 py-2.5" :class="a.cost ? 'text-slate-600 dark:text-slate-300' : 'text-slate-400'">{{ Fmt.costText(a.cost, a.currency) }}<span v-if="a.cost && a.renewal_cycle" class="text-xs text-slate-400 ml-1">/{{ Fmt.CYCLE_LABELS[a.renewal_cycle] || a.renewal_cycle }}</span></td>
             <td class="px-4 py-2.5 text-right whitespace-nowrap">
               <a v-if="a.renew_url" :href="a.renew_url" target="_blank" class="text-emerald-600 dark:text-emerald-400 hover:underline mr-3 text-xs">续费</a>
               <button @click="edit(a)" class="text-blue-600 dark:text-blue-400 hover:underline mr-3 text-xs">编辑</button>
@@ -107,7 +107,7 @@ const MonitorView = {
         </div>
         <div class="flex items-center gap-3 mt-2 text-xs">
           <span class="text-slate-500">{{ a.expiry_date }}</span>
-          <span class="text-slate-500">{{ a.cost }}{{ a.currency }}</span>
+          <span :class="a.cost ? 'text-slate-500' : 'text-slate-400'">{{ Fmt.costText(a.cost, a.currency) }}</span>
           <span class="text-xs px-2 py-0.5 rounded-full" :class="Fmt.typeBadge(a.asset_type)">{{ Fmt.TYPE_LABELS[a.asset_type] }}</span>
         </div>
         <div class="flex gap-4 mt-2 pt-2 border-t border-slate-100 dark:border-slate-800 text-xs">

static/js/views/providers.js

@@ -25,7 +25,16 @@ const ProvidersView = {
           <span v-else class="text-xs px-2 py-0.5 rounded-full" :class="Fmt.typeBadge(p.category)">{{ Fmt.CATEGORY_LABELS[p.category] }}</span>
         </div>
         <div class="text-xs text-slate-500 mt-2 space-y-1">
-          <div v-if="p.sdk_type">API 对接: {{ p.sdk_type }}</div>
+          <!-- API 对接状态如实展示：能力矩阵来自后端 /providers/adapters，
+               即「适配器真的实现了哪些方法」，不是拿 sdk_type 有没有值充数 -->
+          <div v-if="isSupported(p)" class="flex flex-wrap items-center gap-1">
+            <span class="text-[10px] px-1.5 py-0.5 rounded-full bg-emerald-500/10 text-emerald-600 dark:text-emerald-400">✓ API 已对接</span>
+            <span v-for="c in capsSummary(p)" :key="c" class="text-[10px] px-1.5 py-0.5 rounded-full bg-slate-100 dark:bg-slate-800 text-slate-500 dark:text-slate-400">{{ c }}</span>
+          </div>
+          <div v-else-if="p.sdk_type" class="text-[10px] px-1.5 py-0.5 inline-block rounded-full bg-red-500/10 text-red-600 dark:text-red-400" :title="'声明的 ' + p.sdk_type + ' 没有对应适配器实现'">
+            ⚠ 已声明 {{ p.sdk_type }}，但无对应适配器
+          </div>
+          <div v-else class="text-[10px] px-1.5 py-0.5 inline-block rounded-full bg-slate-100 dark:bg-slate-800 text-slate-400">未对接 API（仅台账登记）</div>
           <div v-if="p.console_url"><a :href="p.console_url" target="_blank" class="text-blue-600 dark:text-blue-400 hover:underline">管理面板 ↗</a></div>
           <div class="flex items-center gap-2 mt-1">
             <button @click="goAssets(p)" :disabled="!countOf(p)" class="text-slate-500 hover:text-blue-600 dark:hover:text-blue-400 disabled:hover:text-slate-500" :title="countOf(p) ? '查看该平台下的资产' : ''">📎 关联 {{ countOf(p) }} 个资产</button>
@@ -79,10 +88,29 @@ const ProvidersView = {
     function serviceList(p) {
       return (p.services || '').split(',').map(s => s.trim()).filter(Boolean);
     }
+    // API 对接状态：以适配器注册表为准，不看 sdk_type 有没有值
+    function isSupported(p) {
+      return !!p.sdk_type && (store.adapters.supported_types || []).includes(p.sdk_type);
+    }
+    // 能力摘要：把 capabilities 里为 true 的方法归并成用户看得懂的标签
+    const CAPS_LABELS = [
+      ['list_vps', 'VPS同步'],
+      ['list_domains', '域名同步'],
+      ['get_account', '余额'],
+      ['start_instance', '开关机'],
+      ['reboot_instance', '重启'],
+      ['renew_instance', '续费'],
+      ['list_dns_records', 'DNS查询'],
+      ['create_dns_record', 'DNS写入'],
+    ];
+    function capsSummary(p) {
+      const caps = sdkCaps(p.sdk_type);
+      return CAPS_LABELS.filter(([k]) => caps[k]).map(([, label]) => label);
+    }
     function fmtTime(iso) {
       if (!iso) return '';
       return new Date(iso).toLocaleString('zh-CN', { month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' });
     }
-    return { store, Fmt, countOf, accountsCountOf, serviceList, showAll, toggleShowAll, visibleProviders, hiddenCount, fmtTime, seed: seedProviders, create: openProviderCreate, edit: openProviderEdit, del: deleteProvider, openAccounts: (p) => openAccountsView(p.slug), manageAccounts: () => openAccountsView(null), goAssets: openAssetsByProvider };
+    return { store, Fmt, countOf, accountsCountOf, serviceList, isSupported, capsSummary, showAll, toggleShowAll, visibleProviders, hiddenCount, fmtTime, seed: seedProviders, create: openProviderCreate, edit: openProviderEdit, del: deleteProvider, openAccounts: (p) => openAccountsView(p.slug), manageAccounts: () => openAccountsView(null), goAssets: openAssetsByProvider };
   },
 };

static/js/views/subscriptions.js

@@ -37,7 +37,7 @@ const SubscriptionsView = {
           <tr v-for="a in subs" :key="a.id" class="hover:bg-slate-50 dark:hover:bg-slate-800/30">
             <td class="px-4 py-2.5 font-medium">{{ a.name }}</td>
             <td class="px-4 py-2.5 text-slate-500">{{ a.provider_name || a.provider }}</td>
-            <td class="px-4 py-2.5 text-slate-600 dark:text-slate-300">{{ a.cost }} {{ a.currency }}<span v-if="a.renewal_cycle" class="text-xs text-slate-400 ml-1">/{{ Fmt.CYCLE_LABELS[a.renewal_cycle] || a.renewal_cycle }}</span></td>
+            <td class="px-4 py-2.5" :class="a.cost ? 'text-slate-600 dark:text-slate-300' : 'text-slate-400'">{{ Fmt.costText(a.cost, a.currency) }}<span v-if="a.cost && a.renewal_cycle" class="text-xs text-slate-400 ml-1">/{{ Fmt.CYCLE_LABELS[a.renewal_cycle] || a.renewal_cycle }}</span></td>
             <td class="px-4 py-2.5" :class="Fmt.expiryText(a.days_to_expiry)">{{ a.expiry_date || '—' }}<span v-if="a.days_to_expiry!==null&&a.days_to_expiry!==undefined" class="text-xs ml-1">({{ Fmt.countdownText(a.days_to_expiry, { unit: '' }) }})</span></td>
             <td class="px-4 py-2.5 text-right whitespace-nowrap">
               <a v-if="a.renew_url" :href="a.renew_url" target="_blank" class="text-emerald-600 dark:text-emerald-400 hover:underline mr-3 text-xs">续费</a>