feat: 租户应用配置支持自定义参数

- 后端: TenantApp 模型添加 custom_configs 字段 (LONGTEXT)
- 后端: tenant_apps API 支持自定义配置的增删改查
- 前端: 应用订阅编辑对话框增加自定义配置编辑区域
- 支持 key-value-备注 三字段结构
- value 使用 textarea 支持超长文本（如提示词）

frontend/src/views/app-config/index.vue

@@ -1,6 +1,7 @@
 <script setup>
 import { ref, reactive, onMounted, computed, watch } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
+import { Delete, Plus } from '@element-plus/icons-vue'
 import api from '@/api'
 import { useAuthStore } from '@/stores/auth'
 
@@ -36,7 +37,8 @@ const form = reactive({
   tenant_id: '',
   app_code: '',
   app_name: '',
-  wechat_app_id: null
+  wechat_app_id: null,
+  custom_configs: []  // 自定义配置 [{key, value, remark}]
 })
 
 // 当前选择的应用是否需要 JS-SDK
@@ -142,7 +144,8 @@ function handleCreate() {
     tenant_id: '',
     app_code: '',
     app_name: '',
-    wechat_app_id: null
+    wechat_app_id: null,
+    custom_configs: []
   })
   wechatAppList.value = []
   dialogVisible.value = true
@@ -155,12 +158,22 @@ async function handleEdit(row) {
     tenant_id: row.tenant_id,
     app_code: row.app_code,
     app_name: row.app_name || '',
-    wechat_app_id: row.wechat_app_id || null
+    wechat_app_id: row.wechat_app_id || null,
+    custom_configs: row.custom_configs ? [...row.custom_configs] : []
   })
   await fetchWechatApps(row.tenant_id)
   dialogVisible.value = true
 }
 
+// 自定义配置管理
+function addCustomConfig() {
+  form.custom_configs.push({ key: '', value: '', remark: '' })
+}
+
+function removeCustomConfig(index) {
+  form.custom_configs.splice(index, 1)
+}
+
 
 async function handleSubmit() {
   await formRef.value.validate()
@@ -301,6 +314,14 @@ onMounted(() => {
           <el-tag v-else type="danger" size="small">未生成</el-tag>
         </template>
       </el-table-column>
+      <el-table-column label="自定义配置" width="100">
+        <template #default="{ row }">
+          <el-tag v-if="row.custom_configs && row.custom_configs.length > 0" type="primary" size="small">
+            {{ row.custom_configs.length }} 项
+          </el-tag>
+          <span v-else style="color: #909399; font-size: 12px">-</span>
+        </template>
+      </el-table-column>
       <el-table-column label="状态" width="80">
         <template #default="{ row }">
           <el-tag :type="row.status === 1 ? 'success' : 'info'" size="small">
@@ -330,7 +351,7 @@ onMounted(() => {
     </div>
     
     <!-- 编辑对话框 -->
-    <el-dialog v-model="dialogVisible" :title="dialogTitle" width="550px">
+    <el-dialog v-model="dialogVisible" :title="dialogTitle" width="750px">
       <el-form ref="formRef" :model="form" :rules="rules" label-width="120px">
         <el-form-item label="租户" prop="tenant_id">
           <el-select 
@@ -379,6 +400,51 @@ onMounted(() => {
             </div>
           </el-form-item>
         </template>
+        
+        <!-- 自定义配置 -->
+        <el-divider content-position="left">自定义配置</el-divider>
+        
+        <div class="custom-configs-section">
+          <div v-for="(config, index) in form.custom_configs" :key="index" class="config-item">
+            <div class="config-row">
+              <el-input 
+                v-model="config.key" 
+                placeholder="配置键 (如: industry)"
+                style="width: 150px"
+              />
+              <el-input 
+                v-model="config.remark" 
+                placeholder="备注说明"
+                style="width: 180px; margin-left: 8px"
+              />
+              <el-button 
+                type="danger" 
+                :icon="Delete" 
+                circle 
+                size="small"
+                style="margin-left: 8px"
+                @click="removeCustomConfig(index)"
+              />
+            </div>
+            <el-input
+              v-model="config.value"
+              type="textarea"
+              :rows="3"
+              :autosize="{ minRows: 2, maxRows: 10 }"
+              placeholder="配置值（支持超长文本，如提示词等）"
+              style="margin-top: 8px"
+            />
+          </div>
+          
+          <el-button type="primary" plain @click="addCustomConfig" style="margin-top: 8px">
+            <el-icon><Plus /></el-icon>
+            添加配置项
+          </el-button>
+          
+          <div v-if="form.custom_configs.length === 0" class="config-empty-tip">
+            暂无自定义配置，点击上方按钮添加
+          </div>
+        </div>
       </el-form>
       <template #footer>
         <el-button @click="dialogVisible = false">取消</el-button>
@@ -449,4 +515,28 @@ onMounted(() => {
   margin-bottom: 8px;
   color: #303133;
 }
+
+/* 自定义配置样式 */
+.custom-configs-section {
+  padding: 0 10px;
+}
+
+.config-item {
+  background: #f5f7fa;
+  border-radius: 8px;
+  padding: 12px;
+  margin-bottom: 12px;
+}
+
+.config-row {
+  display: flex;
+  align-items: center;
+}
+
+.config-empty-tip {
+  color: #909399;
+  font-size: 13px;
+  text-align: center;
+  padding: 20px 0;
+}
 </style>