fix(gui): Resolve ImportErrors in modular discussion renderer

- Fix incorrect 'imscope' and 'theme' imports in src/discussion_entry_renderer.py.
- Successfully verified imports via uv run.

src/discussion_entry_renderer.py

@@ -4,7 +4,7 @@ import re
 import datetime
 from pathlib import Path
 from typing import TYPE_CHECKING, Any
-from src import imscope, theme, project_manager, mcp_client, ui_shared
+from src import imgui_scopes as imscope, theme_2 as theme, project_manager, mcp_client, ui_shared
 
 if TYPE_CHECKING:
     from src.gui_2 import App