fix: load api_config before generate_pdf call in export_pdf

app/routes/plans.py

@@ -626,6 +626,10 @@ def export_pdf(plan_id):
     except:
         pass
 
+    # 获取API配置（水印文本等）
+    from app.config import load_api_config
+    api_config = load_api_config(current_app.config)
+
     # 如果有模板，先渲染
     rendered_report = None
     if report_template:
@@ -650,6 +654,7 @@ def export_pdf(plan_id):
             rendered_report = rendered_report.replace("{ai_report}", "（未生成AI报告）")
 
         problem_tags = ""
+
         for problem in content.get('problems', []):
             problem_tags += f"- **{problem.get('name', '')}** ({problem.get('severity', '')})\n"
         rendered_report = rendered_report.replace("{problem_tags}", problem_tags or "（无）")