feat: session manger (#867)

* feat: init session manger

* feat: persist selected app to localStorage

- Save app selection when switching providers
- Restore last selected app on page load

* feat: persist current view to localStorage

- Save view selection when switching tabs
- Restore last selected view on page load

* styles: update ui

* feat: Improve macOS Terminal activation and refactor Kitty launch to use  command with user's default shell.

* fix: session view

* feat: toc

* feat: Implement FlexSearch for improved session search functionality.

* feat: Redesign session manager search and filter UI for a more compact and dynamic experience.

* refactor: modularize session manager by extracting components and utility functions into dedicated files.

* feat: Enhance session terminal launching with support for iTerm2, Ghostty, WezTerm, and Alacritty, including UI and custom configuration options.

* feat: Conditionally render terminal selection and resume session buttons only on macOS.

src-tauri/src/commands/mod.rs

@@ -13,6 +13,7 @@ mod prompt;
 mod provider;
 mod proxy;
 mod settings;
+mod session_manager;
 pub mod skill;
 mod stream_check;
 mod usage;
@@ -30,6 +31,7 @@ pub use prompt::*;
 pub use provider::*;
 pub use proxy::*;
 pub use settings::*;
+pub use session_manager::*;
 pub use skill::*;
 pub use stream_check::*;
 pub use usage::*;