chore: post-deployment cleanup and docs update

- Make AI routing rules DB-driven (read from system_configs, removed from config.py)
- Add translation quota tracking to LLM translation (OpenAIProvider)
- Add Alibaba MT ECS RAM role support (STS token, no AccessKey needed)
- Fix admin sidebar link for AI模型配置 page
- Fix Quota.vue API path (quotas → translation-quotas)
- Fix login auto-redirect to dashboard
- Add provider dropdown selects to AI routing config UI
- Clean up stale ai_provider_* system_configs records
- Remove OpencodeGo, Spark providers (code + DB)
- Update deploy config: nginx port 8000, systemd cwd

admin-frontend/src/views/Config.vue

@@ -7,7 +7,24 @@
           <el-tag size="small" v-if="cfg.description">{{ cfg.description }}</el-tag>
         </div>
       </template>
-      <div v-if="typeof cfg.value === 'object' && !Array.isArray(cfg.value)">
+      <div v-if="cfg.key === 'ai_routing'">
+        <div v-for="(taskVal, taskKey) in cfg.value" :key="taskKey" class="cfg-nested-group">
+          <div class="cfg-group-title">{{ fieldLabelsMap.ai_routing?.[taskKey] || taskKey }}</div>
+          <div class="cfg-field">
+            <span class="cfg-label">主选</span>
+            <el-select v-model="edits[cfg.key][taskKey].primary" size="small" style="width:300px" filterable>
+              <el-option v-for="p in providers" :key="p.provider_type" :value="p.provider_type" :label="p.name + ' — ' + p.model_name" />
+            </el-select>
+          </div>
+          <div class="cfg-field">
+            <span class="cfg-label">备用</span>
+            <el-select v-model="edits[cfg.key][taskKey].fallback" size="small" style="width:400px" multiple filterable collapse-tags>
+              <el-option v-for="p in providers" :key="p.provider_type" :value="p.provider_type" :label="p.name + ' — ' + p.model_name" />
+            </el-select>
+          </div>
+        </div>
+      </div>
+      <div v-else-if="typeof cfg.value === 'object' && !Array.isArray(cfg.value)">
         <div class="cfg-field" v-for="(v, k) in cfg.value" :key="k">
           <span class="cfg-label">{{ fieldLabel(cfg.key, k) }}</span>
           <el-input v-if="typeof v === 'string'" v-model="edits[cfg.key][k]" size="small" style="width:300px" />
@@ -34,12 +51,33 @@
 import { ref, reactive, onMounted } from 'vue'
 import { ElMessage } from 'element-plus'
 import { listConfig, updateConfig } from '@/api'
+import http from '@/api'
 
 const configs = ref([])
 const edits = reactive({})
-const configLabels = { system_maintenance: '系统维护', feature_flags: '功能开关', translation_providers: '翻译服务', ai_model_config: 'AI模型', cache_ttl: '缓存时间' }
-const fieldLabelsMap = { system_maintenance: { maintenance_mode: '维护模式', maintenance_message: '维护消息' }, feature_flags: { feature_wechat_login: '微信登录', feature_export: '数据导出' }, translation_providers: { primary: '首选服务', fallback: '备用服务' }, ai_model_config: { default_model: '默认模型', max_tokens: '最大Token' } }
-function fieldLabel(key, k) { return fieldLabelsMap[key]?.[k] || k }
+const providers = ref([])
+const configLabels = { system_maintenance: '系统维护', feature_flags: '功能开关', translation_providers: '翻译服务', ai_model_config: 'AI模型', cache_ttl: '缓存时间', ai_routing: 'AI路由规则' }
+const fieldLabelsMap = { system_maintenance: { maintenance_mode: '维护模式', maintenance_message: '维护消息' }, feature_flags: { feature_wechat_login: '微信登录', feature_export: '数据导出' }, translation_providers: { primary: '首选服务', fallback: '备用服务' }, ai_model_config: { default_model: '默认模型', max_tokens: '最大Token' }, ai_routing: { translate: '翻译', reply: '回复建议', marketing: '营销文案', extract: '信息提取', quotation: '报价单', chat: 'AI助手' } }
+const taskFieldLabels = { primary: '主选', fallback: '备用' }
+function fieldLabel(key, k) {
+  if (key === 'ai_routing') return configLabels[key] + ' > ' + (taskFieldLabels[k] || k)
+  return fieldLabelsMap[key]?.[k] || k
+}
+function taskFieldLabel(cfgKey, taskKey, subKey) {
+  if (cfgKey === 'ai_routing') {
+    const taskLabel = fieldLabelsMap.ai_routing?.[taskKey] || taskKey
+    const subLabel = taskFieldLabels[subKey] || subKey
+    return taskLabel + ' > ' + subLabel
+  }
+  return subKey || taskKey
+}
+
+async function loadProviders() {
+  try {
+    const res = await http.get('/admin/ai-providers')
+    providers.value = (res.items || []).filter(p => p.enabled)
+  } catch (_) {}
+}
 
 async function load() {
   try {
@@ -48,13 +86,14 @@ async function load() {
     for (const cfg of configs.value) {
       edits[cfg.key] = JSON.parse(JSON.stringify(cfg.value))
     }
+    await loadProviders()
   } catch (e) { console.error(e) }
 }
 
 async function save(key) {
   try {
     await updateConfig(key, edits[key])
-    ElMessage.success('已保存')
+    ElMessage.success('已保存，AI 路由器已重载')
   } catch (e) { ElMessage.error(e?.detail || '保存失败') }
 }
 
@@ -66,5 +105,7 @@ onMounted(load)
 .cfg-header { display: flex; align-items: center; gap: 12px; font-weight: 600; }
 .cfg-field { display: flex; align-items: center; gap: 12px; padding: 8px 0; }
 .cfg-label { width: 160px; font-size: 13px; color: #666; flex-shrink: 0; }
+.cfg-nested-group { margin-bottom: 12px; padding: 8px 12px; background: #f9fafb; border-radius: 6px; }
+.cfg-group-title { font-weight: 600; font-size: 13px; color: #333; margin-bottom: 4px; padding-bottom: 4px; border-bottom: 1px solid #e5e7eb; }
 .cfg-actions { margin-top: 12px; }
 </style>