fix(agent): close runtime context persistence gaps

nanobot/agent/loop.py

@@ -86,7 +86,6 @@ from nanobot.triggers.local_turns import LocalTriggerTurnCoordinator
 from nanobot.utils.document import extract_documents, reference_non_image_attachments
 from nanobot.utils.helpers import image_placeholder_text
 from nanobot.utils.helpers import truncate_text as truncate_text_fn
-from nanobot.utils.image_generation_intent import image_generation_prompt
 from nanobot.utils.llm_runtime import LLMRuntime
 from nanobot.utils.runtime import (
     EMPTY_FINAL_RESPONSE_MESSAGE,
@@ -674,7 +673,7 @@ class AgentLoop:
         scope = self.workspace_scopes.for_message(msg, session.metadata)
         return self.context.build_messages(
             history=history,
-            current_message=image_generation_prompt(msg.content, msg.metadata),
+            current_message=msg.content,
             media=msg.media if msg.media else None,
             channel=msg.channel,
             chat_id=self._runtime_chat_id(msg),