feat: 适配 RTX 3090 (24GB) 环境优化

硬件迁移：从 RTX 5090 (32GB) 迁移到 RTX 3090 (24GB)

主要改动：
- 所有启动脚本和配置文件中的 /home/xsl/ 路径替换为 /home/ubuntu/
- 适配新的 24GB VRAM 环境

test_haircolor.py

@@ -2,7 +2,7 @@
 """换发色接口测试"""
 import base64, json, requests, sys
 
-img_path = "/home/xsl/change_hair/project/data/userImage/8488902485_20250630055547.jpg"
+img_path = "/home/ubuntu/change_hair/project/data/userImage/8488902485_20250630055547.jpg"
 with open(img_path, "rb") as f:
     img_b64 = base64.b64encode(f.read()).decode()
 
@@ -21,7 +21,7 @@ try:
     result = d.get("result", "")
     if d.get("state") == 0 and result:
         # 保存结果图
-        out = "/home/xsl/change_hair/project/logs/test_haircolor_result.jpg"
+        out = "/home/ubuntu/change_hair/project/logs/test_haircolor_result.jpg"
         with open(out, "wb") as f:
             f.write(base64.b64decode(result))
         print(f"✅ 换发色成功! 结果图已保存: {out} ({len(result)} bytes base64)")