feat(gui): Add External Editor configuration panel to AI Settings

- Added _render_external_editor_panel method to display configured editors
- Shows default editor marker and diff args
- Displays config file locations for user reference
- Integrated as 'External Editor' section in AI Settings

src/gui_2.py

@@ -871,6 +871,8 @@ class App:
       self._render_system_prompts_panel()
      if imgui.collapsing_header("RAG Settings"):
       self._render_rag_panel()
+     if imgui.collapsing_header("External Editor"):
+      self._render_external_editor_panel()
      self._render_agent_tools_panel()
     imgui.end()
    if self.ui_separate_usage_analytics and self.show_windows.get("Usage Analytics", False):
@@ -4834,6 +4836,29 @@ def hello():
   if imgui.button("Rebuild Index"):
    self.controller.event_queue.put('click', 'btn_rebuild_rag_index')
 
+ def _render_external_editor_panel(self) -> None:
+  from src.external_editor import get_default_launcher
+  launcher = get_default_launcher()
+  editors = launcher.config.editors
+  default_name = launcher.config.default_editor
+  imgui.text("Configured Editors:")
+  if not editors:
+   imgui.text_colored(vec4(1, 0.5, 0, 1), "  No editors configured")
+   imgui.text("Add editors in config.toml:")
+   imgui.text("  [tools.text_editors]")
+   imgui.text('  vscode = "C:\\\\path\\\\to\\\\code.exe"')
+  else:
+   for name, editor in editors.items():
+    is_default = name == default_name
+    marker = " (default)" if is_default else ""
+    imgui.text(f"  {name}{marker}: {editor.path}")
+    if editor.diff_args:
+     imgui.text(f"    diff args: {editor.diff_args}")
+  imgui.text("")
+  imgui.text("Configuration:")
+  imgui.text("  Global: config.toml [tools.text_editors]")
+  imgui.text("  Project: manual_slop.toml default_editor")
+
  def _render_agent_tools_panel(self) -> None:
   if imgui.collapsing_header("Active Tool Presets & Biases", imgui.TreeNodeFlags_.default_open):
    imgui.text("Tool Preset")