feat(runtime): capture step evidence in console

api/console.py

@@ -105,7 +105,7 @@ class ConsoleService:
         if self._metadata_store.get_task(task_id) is None:
             raise KeyError("task not found")
         return [
-            self._inline_screenshot(record) for record in self._timeline.read(task_id)
+            self._inline_screenshots(record) for record in self._timeline.read(task_id)
         ]
 
     def get_runtime_config(self) -> dict[str, int]:
@@ -124,15 +124,23 @@ class ConsoleService:
         )
 
     @staticmethod
-    def _inline_screenshot(record: dict[str, Any]) -> dict[str, Any]:
+    def _inline_screenshots(record: dict[str, Any]) -> dict[str, Any]:
         payload = dict(record)
-        screenshot_path = payload.get("screenshot_path")
-        if screenshot_path:
+        for path_key, image_key in (
+            ("before_screenshot_path", "before_image_base64"),
+            ("after_screenshot_path", "after_image_base64"),
+            ("screenshot_path", "image_base64"),
+        ):
+            screenshot_path = payload.get(path_key)
+            if not screenshot_path:
+                continue
             path = Path(str(screenshot_path))
             if path.exists():
-                payload["image_base64"] = base64.b64encode(path.read_bytes()).decode(
-                    "ascii"
-                )
+                payload[image_key] = base64.b64encode(path.read_bytes()).decode("ascii")
+        if "after_image_base64" not in payload and "image_base64" in payload:
+            payload["after_image_base64"] = payload["image_base64"]
+        elif "after_image_base64" in payload:
+            payload["image_base64"] = payload["after_image_base64"]
         return payload
 
     def _runner_max_steps(self) -> int: