fix: save watermark_text in update_api_config

app/routes/settings.py

@@ -73,6 +73,7 @@ def update_api_config():
         "model": data.get("model", "doubao-seed-2.0-pro"),
         "temperature": float(data.get("temperature", 0.7)),
         "prompt_template": data.get("prompt_template", ""),
+        "watermark_text": data.get("watermark_text", ""),
     }
 
     save_api_config(config, current_app.config)

app/services/pdf_generator.py

@@ -275,7 +275,6 @@ def generate_pdf(plan_id, student_name, content, output_dir, rendered_report=Non
         if not watermark_text:
             return
         if not CHINESE_FONT_OK:
-            print(f"[WATERMARK] Skipping watermark - CHINESE_FONT_OK=False, FONT_PATH={FONT_PATH}")
             return
         c.saveState()
         try:
@@ -287,9 +286,8 @@ def generate_pdf(plan_id, student_name, content, output_dir, rendered_report=Non
             c.rotate(45)
             # 绘制水印文字（居中）
             c.drawCentredString(0, 0, watermark_text)
-            print(f"[WATERMARK] Drawn: {watermark_text}")
-        except Exception as e:
-            print(f"[WATERMARK] Error: {e}")
+        except Exception:
+            pass
         c.restoreState()
 
     doc.build(pdf.elements, onFirstPage=draw_watermark, onLaterPages=draw_watermark)