refactor(core): remove provider module, migrate to LLMProvider, add client mode handling, improve serialization error handling, update workspace edition, and clean up conditionals and imports

crates/owlen-tui/src/state/mod.rs

@@ -0,0 +1,10 @@
+//! State helpers shared across TUI components.
+//!
+//! The `state` module contains lightweight wrappers that encapsulate UI state
+//! shared between widgets.  Keeping these helpers out of the main `chat_app`
+//! implementation makes the command palette and other stateful widgets easier
+//! to test in isolation.
+
+mod command_palette;
+
+pub use command_palette::CommandPalette;