feat: add backend autocomplete for suppliers and users in inbound

Co-authored-by: aider (openai/DeepSeek-V3.2-Thinking) <aider@aider.chat>

inventory-backend/app/api/v1/inbound/buy.py

@@ -110,4 +110,26 @@ def get_history(id):
         })
     except Exception as e:
         traceback.print_exc()
-        return jsonify({"code": 500, "msg": str(e)}), 500
+        return jsonify({"code": 500, "msg": str(e)}), 500
+
+
+# ------------------------------------------------------------------
+# 6. 供应商建议
+# ------------------------------------------------------------------
+@inbound_buy_bp.route('/suggestions/suppliers', methods=['GET'])
+def get_supplier_suggestions():
+    base_id = request.args.get('base_id', type=int)
+    if not base_id:
+        return jsonify({"code": 400, "msg": "base_id required"}), 400
+    data = BuyInboundService.get_history_suppliers(base_id)
+    return jsonify({"code": 200, "msg": "success", "data": data})
+
+
+# ------------------------------------------------------------------
+# 7. 系统用户建议
+# ------------------------------------------------------------------
+@inbound_buy_bp.route('/suggestions/users', methods=['GET'])
+def get_user_suggestions():
+    keyword = request.args.get('keyword', '')
+    data = BuyInboundService.search_system_users(keyword)
+    return jsonify({"code": 200, "msg": "success", "data": data})