fix(conductor): Resolve FileExistsError and harden Preset Manager modal

src/app_controller.py

@@ -822,7 +822,7 @@ class AppController:
   self.ui_auto_add_history = disc_sec.get("auto_add", False)
   self.ui_global_system_prompt = self.config.get("ai", {}).get("system_prompt", "")
   
-  self.preset_manager = presets.PresetManager(Path(self.active_project_path) if self.active_project_path else None)
+  self.preset_manager = presets.PresetManager(Path(self.active_project_path).parent if self.active_project_path else None)
   self.presets = self.preset_manager.load_all()
   self.ui_global_preset_name = ai_cfg.get("active_preset")
   self.ui_project_preset_name = proj_meta.get("active_preset")
@@ -1793,6 +1793,8 @@ class AppController:
    self.max_tokens = preset.max_output_tokens
 
  def _cb_save_preset(self, name, content, temp, top_p, max_tok, scope):
+  if not name or not name.strip():
+   raise ValueError("Preset name cannot be empty or whitespace.")
   preset = models.Preset(
    name=name,
    system_prompt=content,