feat: remove session hub and related commands from the application

src/app/mode/mod.rs

@@ -19,14 +19,10 @@ pub mod mcp;
 pub mod onboard;
 #[expect(dead_code)]
 pub mod onboard_provider;
-#[expect(dead_code)]
-pub mod picker;
 pub mod quit_confirm;
 #[expect(dead_code)]
 pub mod rewind;
 pub mod security;
-#[expect(dead_code)]
-pub mod session_hub;
 pub mod settings;
 pub mod todo;
 #[expect(dead_code)]
@@ -40,11 +36,9 @@ pub enum ModeKind {
     Workflow,
     Help,
     Settings,
-    SessionHub,
     QuitConfirm,
     Onboard,
     OnboardProvider,
-    Picker,
     KeyInput,
     Editor,
     Effort,
@@ -64,11 +58,9 @@ impl ModeKind {
             ModeKind::Workflow => "Workflow",
             ModeKind::Help => "Help",
             ModeKind::Settings => "Settings",
-            ModeKind::SessionHub => "SessionHub",
             ModeKind::QuitConfirm => "QuitConfirm",
             ModeKind::Onboard => "Onboard",
             ModeKind::OnboardProvider => "OnboardProvider",
-            ModeKind::Picker => "Picker",
             ModeKind::KeyInput => "KeyInput",
             ModeKind::Editor => "Editor",
             ModeKind::Effort => "Effort",