feat: 新增图片占位符提示词固定模板 入库时拼接

api/agents/memory_agent.py

@@ -12,6 +12,7 @@ from .prompts import (
     get_memory_prompt,
     get_chapter_classification_prompt,
     get_text_rewrite_prompt,
+    inject_image_placeholder_template,
     CHAPTER_CATEGORIES,
     STAGE_TO_ORDER,
 )
@@ -106,13 +107,15 @@ class MemoryAgent:
             content = content.strip()
             
             result = json.loads(content)
+            result["content"] = inject_image_placeholder_template(result.get("content") or "")
             return result
-            
+
         except json.JSONDecodeError:
             # 如果解析失败，返回基本结构
+            raw = response.content if hasattr(response, 'content') else str(response)
             return {
                 "title": CHAPTER_CATEGORIES.get(chapter_category, "章节"),
-                "content": response.content if hasattr(response, 'content') else str(response),
+                "content": inject_image_placeholder_template(raw),
                 "summary": "",
                 "image_suggestions": []
             }