Add client-side user setting for agent commit attribution (#9323)

app/src/settings/ai.rs

@@ -1446,6 +1446,20 @@ define_settings_group!(AISettings, settings: [
         sync_to_cloud: SyncToCloud::Never,
         private: true,
     }
+
+    // Whether Oz should add attribution (co-author line) to commit messages and PRs.
+    // This is the user-level preference; it may be overridden by the team-level
+    // `enable_warp_attribution` AdminEnablementSetting (see
+    // `UserWorkspaces::get_agent_attribution_setting`).
+    agent_attribution_enabled: AgentAttributionEnabled {
+        type: bool,
+        default: true,
+        supported_platforms: SupportedPlatforms::ALL,
+        sync_to_cloud: SyncToCloud::Globally(RespectUserSyncSetting::No),
+        private: false,
+        toml_path: "agents.oz.other.agent_attribution_enabled",
+        description: "Whether Oz adds an attribution co-author line to commit messages and pull requests it creates.",
+    }
 ]);
 
 impl AISettings {