实现插件配置持久化与任务队列持久化

插件配置持久化：
- plugin_settings 表新增 config_json 字段，支持存储每个插件的自定义配置
- BaseCrawlerPlugin 新增 default_config 属性和 update_config 方法
- PluginSettingsRepository 新增 get_config / set_config 方法
- PluginService 新增 get_plugin_config 和 update_plugin_config
- api/routes/plugins.py 新增 GET /{id}/config 和 POST /{id}/config 接口
- 前端 Plugins.vue 增加配置编辑对话框，支持动态渲染数字/布尔/字符串类型配置
- ip3366 插件示例化：增加 max_pages 配置项，验证配置生效后会动态更新爬取 URL

任务队列持久化：
- 新建 validation_tasks 表：id, ip, port, protocol, status, result, response_time_ms, created_at, updated_at
- 新建 ValidationTaskRepository，提供 insert_batch / acquire_pending / complete_task / reset_processing 等方法
- ValidationQueue 重构：
  - submit() 时把任务写入数据库并唤醒 Worker
  - Worker 通过 acquire_pending 原子取任务并验证
  - 验证完成后更新任务状态并入库有效代理
  - 启动时自动恢复之前中断的 processing 任务为 pending
  - 支持 drain() 等待所有 pending 完成
- 调度器验证流程同样自动持久化到任务表

其他适配：
- 更新 api/deps.py 和 api/lifespan.py，移除对已删除 settings_service 的残留引用
- 更新前端 pluginService.js 和 api/index.js 增加配置相关 API

frontend/src/api/index.js

@@ -79,6 +79,8 @@ export const proxiesAPI = {
 export const pluginsAPI = {
   getPlugins: () => api.get('/api/plugins'),
   togglePlugin: (pluginId, enabled) => api.put(`/api/plugins/${pluginId}/toggle`, { enabled }),
+  getPluginConfig: (pluginId) => api.get(`/api/plugins/${pluginId}/config`),
+  updatePluginConfig: (pluginId, config) => api.post(`/api/plugins/${pluginId}/config`, { config }),
   crawlPlugin: (pluginId) => api.post(`/api/plugins/${pluginId}/crawl`),
   crawlAll: () => api.post('/api/plugins/crawl-all')
 }

frontend/src/services/pluginService.js

@@ -9,6 +9,14 @@ export const pluginService = {
     return pluginsAPI.togglePlugin(pluginId, enabled)
   },
 
+  async getPluginConfig(pluginId) {
+    return pluginsAPI.getPluginConfig(pluginId)
+  },
+
+  async updatePluginConfig(pluginId, config) {
+    return pluginsAPI.updatePluginConfig(pluginId, config)
+  },
+
   async crawlPlugin(pluginId) {
     return pluginsAPI.crawlPlugin(pluginId)
   },

frontend/src/views/Plugins.vue

@@ -74,11 +74,19 @@
           </template>
         </el-table-column>
 
-        <el-table-column label="操作" width="150" fixed="right" align="center">
+        <el-table-column label="操作" width="200" fixed="right" align="center">
           <template #default="{ row }">
             <el-button
               type="primary"
               size="small"
+              @click="handleOpenConfig(row)"
+            >
+              <el-icon class="btn-icon"><Setting /></el-icon>
+              配置
+            </el-button>
+            <el-button
+              type="success"
+              size="small"
               @click="handleCrawl(row.id)"
               :loading="crawlingPlugin === row.id"
               :disabled="!row.enabled"
@@ -123,11 +131,50 @@
         </template>
       </el-alert>
     </el-card>
+
+    <!-- 配置编辑对话框 -->
+    <el-dialog
+      v-model="configDialogVisible"
+      title="插件配置"
+      width="400px"
+      :close-on-click-modal="false"
+    >
+      <div v-if="currentPlugin">
+        <div class="config-plugin-name">{{ currentPlugin.name }}</div>
+        <el-form label-width="120px">
+          <el-form-item
+            v-for="(value, key) in configForm"
+            :key="key"
+            :label="String(key)"
+          >
+            <el-input-number
+              v-if="typeof value === 'number'"
+              v-model="configForm[key]"
+              :min="0"
+              style="width: 180px"
+            />
+            <el-switch
+              v-else-if="typeof value === 'boolean'"
+              v-model="configForm[key]"
+            />
+            <el-input
+              v-else
+              v-model="configForm[key]"
+              style="width: 180px"
+            />
+          </el-form-item>
+        </el-form>
+      </div>
+      <template #footer>
+        <el-button @click="configDialogVisible = false">取消</el-button>
+        <el-button type="primary" @click="handleSaveConfig" :loading="savingConfig">保存</el-button>
+      </template>
+    </el-dialog>
   </div>
 </template>
 
 <script setup>
-import { ref, onMounted } from 'vue'
+import { ref, reactive, onMounted } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { 
   Connection, 
@@ -135,7 +182,8 @@ import {
   Promotion, 
   CircleCheck, 
   CircleClose,
-  Box
+  Box,
+  Setting
 } from '@element-plus/icons-vue'
 import { usePluginsStore } from '../stores/plugins'
 import { pluginService } from '../services/pluginService'
@@ -147,6 +195,12 @@ const crawlingPlugin = ref(null)
 const crawlingAll = ref(false)
 const lastCrawlResult = ref(null)
 
+// 配置对话框
+const configDialogVisible = ref(false)
+const currentPlugin = ref(null)
+const configForm = reactive({})
+const savingConfig = ref(false)
+
 // ==================== 事件处理 ====================
 async function handleRefresh() {
   await pluginsStore.fetchPlugins()
@@ -158,11 +212,40 @@ async function handleToggle(pluginId, enabled) {
   if (success) {
     ElMessage.success(enabled ? '插件已启用' : '插件已禁用')
   } else {
-    // 失败时刷新列表恢复状态
     await pluginsStore.fetchPlugins()
   }
 }
 
+async function handleOpenConfig(row) {
+  currentPlugin.value = row
+  const response = await pluginService.getPluginConfig(row.id)
+  if (response.code === 200) {
+    Object.keys(configForm).forEach(key => delete configForm[key])
+    Object.assign(configForm, response.data.config || {})
+    configDialogVisible.value = true
+  } else {
+    ElMessage.error('获取插件配置失败')
+  }
+}
+
+async function handleSaveConfig() {
+  if (!currentPlugin.value) return
+  savingConfig.value = true
+  try {
+    const response = await pluginService.updatePluginConfig(currentPlugin.value.id, { ...configForm })
+    if (response.code === 200) {
+      ElMessage.success('配置保存成功')
+      configDialogVisible.value = false
+    } else {
+      ElMessage.error(response.message || '保存失败')
+    }
+  } catch (error) {
+    ElMessage.error('保存配置出错')
+  } finally {
+    savingConfig.value = false
+  }
+}
+
 async function handleCrawl(pluginId) {
   try {
     crawlingPlugin.value = pluginId
@@ -176,7 +259,6 @@ async function handleCrawl(pluginId) {
         message: response.message,
         data: response.data
       }
-      // 刷新插件统计
       await pluginsStore.fetchPlugins()
     } else {
       lastCrawlResult.value = {
@@ -196,7 +278,6 @@ async function handleCrawl(pluginId) {
 
 async function handleCrawlAll() {
   try {
-    // 确认是否爬取所有插件
     const enabledPlugins = pluginsStore.plugins.filter(p => p.enabled)
     if (enabledPlugins.length === 0) {
       ElMessage.warning('没有启用的插件')
@@ -225,7 +306,6 @@ async function handleCrawlAll() {
         data: response.data
       }
       ElMessage.success('批量爬取完成')
-      // 刷新插件统计
       await pluginsStore.fetchPlugins()
     } else {
       lastCrawlResult.value = {
@@ -373,4 +453,11 @@ onMounted(async () => {
 .invalid-count {
   color: var(--danger);
 }
+
+.config-plugin-name {
+  font-size: 16px;
+  font-weight: 600;
+  margin-bottom: 16px;
+  color: var(--text-primary);
+}
 </style>