fix(memory): expose media references to session consolidation (#5157)

Co-authored-by: shakewingo <yaoyingshakewin@gmail.com>
Co-authored-by: bingqilinweimaotai <111987281+bingqilinweimaotai@users.noreply.github.com>

nanobot/agent/memory.py

@@ -19,6 +19,7 @@ from nanobot.runtime_context import public_history_messages
 from nanobot.session.manager import Session, SessionManager
 from nanobot.utils.gitstore import GitStore
 from nanobot.utils.helpers import (
+    content_with_media_breadcrumbs,
     ensure_dir,
     estimate_message_tokens,
     estimate_prompt_tokens_chain,
@@ -695,11 +696,17 @@ class MemoryStore:
     def _format_messages(messages: list[dict]) -> str:
         lines = []
         for message in messages:
-            if not message.get("content"):
+            content = content_with_media_breadcrumbs(
+                message.get("role"),
+                message.get("content", ""),
+                message.get("media"),
+            )
+            if not content:
                 continue
             tools = f" [tools: {', '.join(message['tools_used'])}]" if message.get("tools_used") else ""
             lines.append(
-                f"[{message.get('timestamp', '?')[:16]}] {message['role'].upper()}{tools}: {message['content']}"
+                f"[{message.get('timestamp', '?')[:16]}] "
+                f"{message['role'].upper()}{tools}: {content}"
             )
         return "\n".join(lines)