Fix some performance issues.

Author: beacoder

python_agent_harness/core/models.py

@@ -75,8 +75,7 @@ def __post_init__(self) -> None:
         self._data_url: str | None = None
         if self.data is not None:
             self._data_url = (
-                f"data:{self.media_type};base64,"
-                f"{base64.b64encode(self.data).decode('ascii')}"
+                f"data:{self.media_type};base64,{base64.b64encode(self.data).decode('ascii')}"
             )
 
     @classmethod

tests/tui/test_tui_render.py

@@ -454,8 +454,7 @@ def test_stream_final_check_with_escape_in_header_hidden(self):
         header regex)."""
         tui, _ = make_tui()
         tui.stream_text = (
-            "answer text\n\n[FINAL\x1b[0m CHECK]\n"
-            "- Goal: x\n- Status: SUCCESS\n- Evidence: y"
+            "answer text\n\n[FINAL\x1b[0m CHECK]\n- Goal: x\n- Status: SUCCESS\n- Evidence: y"
         )
         row = tui._stream_row()
         self.assertIsNotNone(row)