feat: 完成数据处理接口与前端接入

frontend/src/views/data-process/create/SourceUploadStep.vue

@@ -21,16 +21,12 @@ const emit = defineEmits<{
 }>()
 
 const DATA_SOURCE_TYPES = [
-  { value: 'mysql', label: 'MySQL' },
   { value: 'postgresql', label: 'PostgreSQL' },
-  { value: 'mongodb', label: 'MongoDB' },
-  { value: 'api', label: 'REST API' },
 ]
 
 const AUTH_MODES = [
   { value: 'none', label: '免鉴权' },
   { value: 'basic', label: '账号密码' },
-  { value: 'token', label: 'Token' },
 ]
 
 const FILE_PAGE_SIZE = 10
@@ -38,9 +34,11 @@ const currentFilePage = ref(1)
 
 const isExternal = computed(() => props.processType === 'external')
 
+// 后端首版严格支持这些可验证的文本格式；不要把无法解析的二进制文档
+// 静默替换成示例正文。
 const uploadAccept = computed(() => props.processType === 'unstructured'
-  ? '.txt,.md,.pdf,.docx,.doc,.json,.jsonl'
-  : '.json,.jsonl,.csv,.xlsx,.xls')
+  ? '.txt,.md,.json,.jsonl'
+  : '.json,.jsonl,.csv,.txt,.md')
 
 const pagedUploadedFiles = computed(() => {
   const start = (currentFilePage.value - 1) * FILE_PAGE_SIZE
@@ -101,7 +99,7 @@ function formatSize(size: number) {
           <el-form-item label="地址 / URL">
             <el-input
               :model-value="externalSource.url"
-              placeholder="例如：mysql://host:3306/db 或 https://api.example.com/data"
+              placeholder="例如：postgresql://db.example.com:5432/my_database"
               aria-label="数据源地址或 URL"
               @update:model-value="updateExternalField('url', $event)"
             />
@@ -140,17 +138,6 @@ function formatSize(size: number) {
               @update:model-value="updateExternalField('password', $event)"
             />
           </el-form-item>
-          <el-form-item v-if="externalSource.authMode === 'token'" label="Token">
-            <el-input
-              :model-value="externalSource.token"
-              type="password"
-              show-password
-              autocomplete="off"
-              placeholder="请输入访问 Token"
-              aria-label="数据源访问 Token"
-              @update:model-value="updateExternalField('token', $event)"
-            />
-          </el-form-item>
           <el-form-item label="拉取条数">
             <el-input-number
               :model-value="externalSource.limit"
@@ -162,6 +149,19 @@ function formatSize(size: number) {
               @update:model-value="updateExternalField('limit', Number($event) || 0)"
             />
           </el-form-item>
+          <el-form-item label="只读查询语句" class="external-query-field">
+            <el-input
+              :model-value="externalSource.query"
+              type="textarea"
+              :rows="4"
+              maxlength="20000"
+              show-word-limit
+              placeholder="例如：SELECT question, answer FROM qa_data ORDER BY id"
+              aria-label="外部数据源只读查询语句"
+              @update:model-value="updateExternalField('query', $event)"
+            />
+            <small>只允许单条 SELECT 或 WITH 查询；后端会拒绝写入、DDL 和多语句。</small>
+          </el-form-item>
         </el-form>
 
         <div class="external-actions">