feat: Add table aggregation endpoint for data summarization

- Implemented a new endpoint to retrieve aggregated data (SUM/COUNT) for specified columns in a given table.
- Added validation to ensure the presence of table name and valid aggregation columns in the request.
- Integrated company code filtering to restrict data access based on user permissions.
- Updated the table management routes to include the new aggregation functionality.
- Enhanced the frontend order page to utilize the new aggregation endpoint for improved statistical reporting.

backend-node/src/controllers/tableManagementController.ts

@@ -907,6 +907,61 @@ export async function getTableData(
   }
 }
 
+/**
+ * 테이블 집계 조회 (SUM/COUNT)
+ * POST /api/table-management/tables/:tableName/aggregate
+ */
+export async function getTableAggregate(
+  req: AuthenticatedRequest,
+  res: Response
+): Promise<void> {
+  try {
+    const { tableName } = req.params;
+    const { columns, autoFilter } = req.body;
+    const companyCode = req.user?.companyCode;
+
+    if (!tableName || !columns || !Array.isArray(columns)) {
+      res.status(400).json({ success: false, message: "tableName과 columns 배열이 필요합니다." });
+      return;
+    }
+
+    const validCols = columns.filter((c: any) =>
+      c.column && c.func && /^[a-zA-Z0-9_]+$/.test(c.column) && ["sum", "count", "avg", "min", "max"].includes(c.func)
+    );
+    if (validCols.length === 0) {
+      res.status(400).json({ success: false, message: "유효한 집계 컬럼이 없습니다." });
+      return;
+    }
+
+    const selectParts = validCols.map((c: any) => {
+      const col = c.column.replace(/[^a-zA-Z0-9_]/g, "");
+      return `${c.func}(COALESCE(CAST(NULLIF(${col}, '') AS numeric), 0)) AS "${c.func}_${col}"`;
+    });
+
+    let whereClause = "";
+    const params: any[] = [];
+    let paramIdx = 1;
+
+    if (autoFilter !== false && companyCode && companyCode !== "*") {
+      whereClause = `WHERE company_code = $${paramIdx}`;
+      params.push(companyCode);
+      paramIdx++;
+    }
+
+    const pool = (await import("../database/db")).getPool();
+    const safeTable = tableName.replace(/[^a-zA-Z0-9_]/g, "");
+    const result = await pool.query(
+      `SELECT ${selectParts.join(", ")} FROM ${safeTable} ${whereClause}`,
+      params
+    );
+
+    res.json({ success: true, data: result.rows[0] || {} });
+  } catch (error: any) {
+    logger.error("테이블 집계 조회 실패:", error);
+    res.status(500).json({ success: false, message: error.message });
+  }
+}
+
 /**
  * 테이블 데이터 추가
  */