refactor: render the shell in the client (#3487)

* feat: add opt-in client-rendered shell

* feat: add client-owned shell mouse controls

* feat: complete client-owned shell chrome

* feat: add client-owned shell settings and notifications

* feat: run client shell custom commands

* feat: render popup terminals in client shell

* feat: add client-owned scrollback and copy mode

* fix: preserve client worktree trust defaults

* feat: render startup diagnostics in client shell

* feat: render onboarding in client shell

* feat: render product announcements in client shell

* feat: render release notes in client shell

* feat: render mobile switcher in client shell

* feat: render kitty graphics in client shell

* fix: preserve client shell lifecycle coherence

* refactor: route client shell commands through endpoint connections

* refactor: make the client-rendered shell the default

* refactor: remove monolithic launch mode

* refactor: complete client-rendered shell cutover

* perf: retain client pane surface updates

* perf: scale retained pane surface updates

* perf: remove remote pane input latency

* test: make client shell checks platform-independent

* fix: prevent client timer starvation

* test: fix client shell platform gates

* test: accept retained surfaces in cross-area checks

* test: make client mode assertions platform-neutral

* fix: badge only outdated integrations

1 files changed, 21 insertions, 45 deletions

diff --git a/src/app/api/tabs.rs b/src/app/api/tabs.rs
index 42d2b029..c1bd86e9 100644
--- a/src/app/api/tabs.rs
+++ b/src/app/api/tabs.rs
@@ -157,13 +157,6 @@ impl App {
         };
         tab.set_custom_name(params.label.clone());
         crate::logging::tab_renamed(&workspace_id, &tab_id);
-        if self.state.active == Some(ws_idx) {
-            // Reflow the tab bar so the new label width takes effect immediately.
-            // The tab bar renders into cached hit areas; without this refresh the
-            // old geometry lingers until the next refresh (e.g. a tab switch),
-            // leaving the visible label stale. Mirrors handle_tab_move.
-            self.state.refresh_tab_bar_view();
-        }
         self.schedule_session_save();
         self.emit_event(EventEnvelope {
             event: EventKind::TabRenamed,
@@ -206,10 +199,6 @@ impl App {
         let tabs = self.tab_list_info(ws_idx);
         if moved {
             self.schedule_session_save();
-            if self.state.active == Some(ws_idx) {
-                self.state.tab_scroll_follow_active = true;
-                self.state.refresh_tab_bar_view();
-            }
             self.emit_event(EventEnvelope {
                 event: EventKind::TabMoved,
                 data: EventData::TabMoved {
@@ -337,7 +326,13 @@ mod tests {
     fn api_tab_close_last_tab_closes_workspace_and_emits_both_events() {
         let event_hub = crate::api::EventHub::default();
         let (_api_tx, api_rx) = tokio::sync::mpsc::unbounded_channel();
-        let mut app = App::new(&Config::default(), true, None, api_rx, event_hub.clone());
+        let mut app = App::new(
+            &Config::default(),
+            crate::app::AppPolicy::TEST,
+            None,
+            api_rx,
+            event_hub.clone(),
+        );
         app.state.workspaces = vec![Workspace::test_new("tabs")];
         app.state.active = Some(0);
         app.state.selected = 0;
@@ -384,7 +379,13 @@ mod tests {
     fn api_tab_move_reorders_tabs_in_target_workspace() {
         let event_hub = crate::api::EventHub::default();
         let (_api_tx, api_rx) = tokio::sync::mpsc::unbounded_channel();
-        let mut app = App::new(&Config::default(), true, None, api_rx, event_hub.clone());
+        let mut app = App::new(
+            &Config::default(),
+            crate::app::AppPolicy::TEST,
+            None,
+            api_rx,
+            event_hub.clone(),
+        );
         let mut workspace = Workspace::test_new("tabs");
         workspace.test_add_tab(Some("two"));
         workspace.test_add_tab(Some("three"));
@@ -424,42 +425,17 @@ mod tests {
         }));
     }
 
-    #[test]
-    fn api_tab_rename_reflows_active_tab_bar() {
-        let event_hub = crate::api::EventHub::default();
-        let (_api_tx, api_rx) = tokio::sync::mpsc::unbounded_channel();
-        let mut app = App::new(&Config::default(), true, None, api_rx, event_hub);
-        let workspace = Workspace::test_new("tabs");
-        app.state.workspaces = vec![workspace];
-        app.state.active = Some(0);
-        app.state.selected = 0;
-        app.state.view.tab_bar_rect = ratatui::layout::Rect::new(0, 0, 60, 1);
-        app.state.refresh_tab_bar_view();
-
-        let tab_id = app.public_tab_id(0, 0).unwrap();
-        let width_before = app.state.view.tab_hit_areas[0].width;
-
-        app.handle_tab_rename(
-            "req".into(),
-            TabRenameParams {
-                tab_id,
-                label: "a much longer custom tab label".into(),
-            },
-        );
-
-        let width_after = app.state.view.tab_hit_areas[0].width;
-        assert!(
-            width_after > width_before,
-            "tab bar should reflow to the new label width immediately: \
-             before={width_before}, after={width_after}"
-        );
-    }
-
     #[tokio::test]
     async fn tab_create_follows_cached_focused_pane_cwd_without_runtime() {
         let event_hub = crate::api::EventHub::default();
         let (_api_tx, api_rx) = tokio::sync::mpsc::unbounded_channel();
-        let mut app = App::new(&Config::default(), true, None, api_rx, event_hub);
+        let mut app = App::new(
+            &Config::default(),
+            crate::app::AppPolicy::TEST,
+            None,
+            api_rx,
+            event_hub,
+        );
         app.state.default_shell = exiting_test_command().into();
         app.state.shell_mode = ShellModeConfig::NonLogin;
         let workspace = Workspace::test_new("tabs");