fix(agent): harden runner integration and QA

tests/unit_tests/platform/test_websocket_adapter_attachments.py

@@ -2,9 +2,9 @@
 
 The web debug client uploads Image / Voice / File components carrying a storage
 key in ``path``. This helper resolves each to a base64 data URI (so multimodal
-LLM input and the Box sandbox inbox have usable bytes), then deletes the
-consumed storage object and clears ``path``. Covers mimetype selection per
-type and fail-closed error handling.
+LLM input and the Box sandbox inbox have usable bytes) while retaining the key
+for browser history. Covers mimetype selection per type and fail-closed error
+handling.
 """
 
 from __future__ import annotations
@@ -52,7 +52,7 @@ def _make_adapter(load_return=b'hello', load_side_effect=None):
 
 
 @pytest.mark.asyncio
-async def test_image_jpeg_mimetype_and_cleanup():
+async def test_image_jpeg_mimetype_and_retained_storage_key():
     adapter, storage_mgr, _ = _make_adapter(load_return=b'\xff\xd8\xff')
     path = f'{_UPLOAD_PREFIX}photo.jpg'
     chain = [{'type': 'Image', 'path': path}]
@@ -61,12 +61,24 @@ async def test_image_jpeg_mimetype_and_cleanup():
 
     expected_b64 = base64.b64encode(b'\xff\xd8\xff').decode('utf-8')
     assert chain[0]['base64'] == f'data:image/jpeg;base64,{expected_b64}'
-    assert chain[0]['path'] == ''  # consumed
-    storage_mgr.delete_scoped_object_key.assert_awaited_once_with(
-        _CONTEXT,
-        path,
-        expected_owner_type='upload_image',
-    )
+    assert chain[0]['path'] == path
+    storage_mgr.delete_scoped_object_key.assert_not_awaited()
+
+
+def test_history_retains_storage_key_without_large_base64_payload():
+    path = f'{_UPLOAD_PREFIX}photo.jpg'
+    chain = [
+        {
+            'type': 'Image',
+            'path': path,
+            'base64': 'data:image/jpeg;base64,large-payload',
+        }
+    ]
+
+    history = WebSocketAdapter._history_message_chain(chain)
+
+    assert history == [{'type': 'Image', 'path': path, 'base64': ''}]
+    assert chain[0]['base64'] == 'data:image/jpeg;base64,large-payload'
 
 
 @pytest.mark.asyncio