refactor(paths): v3 design - explicit initialize_paths + frozen PathsConfig singleton

src/gui_2.py

@@ -1311,7 +1311,7 @@ class App:
   cfg_path = paths.get_config_path()
   if cfg_path.exists(): shutil.copy(cfg_path, str(cfg_path) + ".bak")
   self.save_config()
-  paths.reset_resolved()
+  paths.initialize_paths(cfg_path)
   self.init_state()
   self.ai_status = 'paths applied and session reset'
 
@@ -2341,10 +2341,17 @@ def render_paths_panel(app: App) -> None:
 
  render_path_field("Logs Directory", "ui_logs_dir", "logs_dir", "Directory where session JSON-L logs and artifacts are stored.")
  render_path_field("Scripts Directory", "ui_scripts_dir", "scripts_dir", "Directory for AI-generated PowerShell scripts.")
- 
+
  imgui.separator()
  if imgui.button("Apply", imgui.ImVec2(120, 0)): app._save_paths()
  imgui.same_line()
+ if imgui.button("Refresh Paths", imgui.ImVec2(140, 0)):
+  paths.initialize_paths(paths.get_config_path())
+  app.init_state()
+  app.ai_status = "paths reloaded from config.toml"
+ if imgui.is_item_hovered():
+  imgui.set_tooltip("Re-read [paths] section from config.toml and rebuild the PathsConfig singleton. Use after editing config.toml directly or after importing a new config.")
+ imgui.same_line()
  if imgui.button("Reset", imgui.ImVec2(120, 0)):
   app.init_state()
   app.ai_status = "paths reset to defaults"