refactor(app_controller): remove gemini_cli state and config

Drop the 11 gemini_cli sites: the ui_gemini_cli_path state field, the
gcli_path settable map entry, the _update_gcli_adapter method, the
project load/save gemini_cli binary_path entries, and the per-provider
gemini_cli guard at startup.

src/app_controller.py

@@ -571,8 +571,6 @@ def _handle_set_value(controller: 'AppController', task: dict):
  if item in controller._settable_fields:
   attr_name = controller._settable_fields[item]
   setattr(controller, attr_name, value)
-  if item == "gcli_path":
-   controller._update_gcli_adapter(str(value))
   return
  # Dict-key bracket notation: e.g. 'show_windows["Project Settings"]'
  if "[" in item and item.endswith("]"):
@@ -1081,7 +1079,6 @@ class AppController:
   self.ui_project_git_dir:           str = ""
   self.ui_project_system_prompt:     str = ""
   self.ui_project_execution_mode:    str = "native"
-  self.ui_gemini_cli_path:           str = "gemini"
   self.ui_word_wrap:                 bool = True
   self.ui_auto_add_history:          bool = False
   self.ui_separate_message_panel:    bool = False
@@ -1121,7 +1118,6 @@ class AppController:
    'project_git_dir':                   'ui_project_git_dir',
    'auto_add_history':                  'ui_auto_add_history',
    'disc_new_name_input':               'ui_disc_new_name_input',
-   'gcli_path':                         'ui_gemini_cli_path',
    'output_dir':                        'ui_output_dir',
    'files_base_dir':                    'ui_files_base_dir',
    'files':                             'ui_file_paths',
@@ -1313,7 +1309,7 @@ class AppController:
    "ui_new_ticket_target", "ui_new_ticket_deps", "ui_output_dir",
    "ui_files_base_dir", "ui_shots_base_dir", "ui_project_git_dir",
    "ui_project_system_prompt", "ui_project_execution_mode",
-   "ui_gemini_cli_path", "ui_word_wrap", "ui_auto_add_history",
+   "ui_word_wrap", "ui_auto_add_history",
    "ui_separate_message_panel", "ui_separate_response_panel",
    "ui_separate_tool_calls_panel", "ui_global_system_prompt",
    "ui_base_system_prompt", "ui_use_default_base_prompt",
@@ -1833,12 +1829,6 @@ class AppController:
    '_cb_create_track':                  self._cb_create_track,
   }
 
- def _update_gcli_adapter(self, path: str) -> None:
-  if not ai_client._gemini_cli_adapter:
-   ai_client._gemini_cli_adapter = ai_client.GeminiCliAdapter(binary_path=str(path))
-  else:
-   ai_client._gemini_cli_adapter.binary_path = str(path)
-
  def _trigger_gui_refresh(self):
   with self._pending_gui_tasks_lock:
    self._pending_gui_tasks.append({'action': 'set_comms_dirty'})
@@ -2019,8 +2009,6 @@ class AppController:
   self.ui_project_git_dir         = proj_meta.get("git_dir", "")
   self.ui_project_conductor_dir   = self.project.get('conductor', {}).get('dir', 'conductor')
   self.ui_project_system_prompt   = proj_meta.get("system_prompt", "")
-  self.ui_gemini_cli_path         = self.project.get("gemini_cli", {}).get("binary_path", "gemini")
-  self._update_gcli_adapter(self.ui_gemini_cli_path)
   self.ui_word_wrap               = proj_meta.get("word_wrap", True)
   self.ui_auto_add_history        = disc_sec.get("auto_add", False)
   self.ui_global_system_prompt    = self.config.get("ai", {}).get("system_prompt", "")
@@ -2722,11 +2710,6 @@ class AppController:
   # provider-SDK import) on the main thread during startup. _fetch_models
   # corrects the model against the live list after the first frame, off-thread.
   ai_client.set_provider(self._current_provider, self._current_model, validate=False)
-  if self._current_provider == "gemini_cli":
-   if not ai_client._gemini_cli_adapter:
-    ai_client._gemini_cli_adapter = ai_client.GeminiCliAdapter(binary_path=self.ui_gemini_cli_path)
-   else:
-    ai_client._gemini_cli_adapter.binary_path = self.ui_gemini_cli_path
   ai_client.confirm_and_run_callback = self._confirm_and_run
   ai_client.set_comms_log_callback(self._on_comms_entry)
   ai_client.tool_log_callback = self._on_tool_log
@@ -2929,7 +2912,6 @@ class AppController:
   proj["project"]["word_wrap"] = self.ui_word_wrap
   proj["project"]["auto_scroll_comms"] = self.ui_auto_scroll_comms
   proj["project"]["auto_scroll_tool_calls"] = self.ui_auto_scroll_tool_calls
-  proj.setdefault("gemini_cli", {})["binary_path"] = self.ui_gemini_cli_path
   proj.setdefault("agent", {}).setdefault("tools", {})
   for t_name in mcp_tool_specs.tool_names():
    proj["agent"]["tools"][t_name] = self.ui_agent_tools.get(t_name, True)
@@ -3212,7 +3194,6 @@ class AppController:
   self.ui_project_git_dir = proj_meta.get("git_dir", "")
   self.ui_project_system_prompt = proj_meta.get("system_prompt", "")
   self.ui_project_preset_name = proj_meta.get("active_preset")
-  self.ui_gemini_cli_path = self.project.get("gemini_cli", {}).get("binary_path", "gemini")
   self.ui_auto_add_history = proj.get("discussion", {}).get("auto_add", False)
   self.ui_auto_scroll_comms = proj.get("project", {}).get("auto_scroll_comms", True)
   self.ui_auto_scroll_tool_calls = proj.get("project", {}).get("auto_scroll_tool_calls", True)
@@ -4120,8 +4101,7 @@ class AppController:
   self.discussion_sent_markdown = event.stable_md
   self.discussion_sent_system_prompt = self.last_resolved_system_prompt
   ai_client.set_model_params(self.temperature, self.max_tokens, self.history_trunc_limit, self.top_p)
-  ai_client.set_agent_tools(self.ui_agent_tools)  # Force update adapter path right before send to bypass potential duplication issues
-  self._update_gcli_adapter(self.ui_gemini_cli_path)
+  ai_client.set_agent_tools(self.ui_agent_tools)
   # FR2 / Bug #1: per conductor/code_styleguides/error_handling.md section 3.1 (AND over OR),
   # we check result.ok instead of catching a ProviderError exception.
   result = ai_client.send(