feat: add dynamic printer configuration manager

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

inventory-backend/app/services/print/network_print_service.py

@@ -1,11 +1,13 @@
 import socket
 import datetime
+from .print_config import PrintConfigManager
 
 
 class NetworkPrintService:
-    def __init__(self, ip='192.168.9.250', port=9100):
-        self.ip = ip
-        self.port = port
+    def __init__(self, ip=None, port=None):
+        config = PrintConfigManager.get_config('network_printer')
+        self.ip = ip if ip is not None else config['ip']
+        self.port = port if port is not None else config['port']
 
     def _send_to_printer(self, content):
         """
@@ -37,4 +39,4 @@ class NetworkPrintService:
 
     def print_stocktake_report(self, data):
         # 同样处理
-        return self._send_to_printer(f"盘点报告: 应盘{data.get('total')}, 实盘{data.get('scanned')}")
+        return self._send_to_printer(f"盘点报告: 应盘{data.get('total')}, 实盘{data.get('scanned')}")