Reduce the surface of collaboration modes (#20149)

Collaboration modes were slightly invasive both into ThreadManager
construction and ModelProvider

codex-rs/core/src/prompt_debug.rs

@@ -4,9 +4,7 @@ use std::sync::Arc;
 use codex_exec_server::EnvironmentManager;
 use codex_exec_server::EnvironmentManagerArgs;
 use codex_exec_server::ExecServerRuntimePaths;
-use codex_features::Feature;
 use codex_login::AuthManager;
-use codex_models_manager::collaboration_mode_presets::CollaborationModesConfig;
 use codex_protocol::error::Result as CodexResult;
 use codex_protocol::models::ResponseInputItem;
 use codex_protocol::models::ResponseItem;
@@ -41,11 +39,6 @@ pub async fn build_prompt_input(
         &config,
         Arc::clone(&auth_manager),
         SessionSource::Exec,
-        CollaborationModesConfig {
-            default_mode_request_user_input: config
-                .features
-                .enabled(Feature::DefaultModeRequestUserInput),
-        },
         Arc::new(EnvironmentManager::new(EnvironmentManagerArgs::new(local_runtime_paths)).await),
         /*analytics_events_client*/ None,
     );