feat: implement interactive lesson management and update command handling

src/app/runtime/commands.rs

@@ -21,29 +21,11 @@ pub fn apply_command(command: Command) -> Vec<Action> {
         Command::Quit => {
             vec![Action::QuitConfirm]
         }
-        Command::LessonCreate(text) => {
-            vec![Action::SystemNote {
-                kind: "lesson".to_string(),
-                message: format!("/lesson {}", text),
-            }]
-        }
-        Command::LessonExport(path) => {
-            vec![Action::LessonExport { path }]
-        }
-        Command::LessonImport(path) => {
-            vec![Action::LessonImport { path }]
-        }
-        Command::LessonList => {
+        Command::LessonInteractive => {
             vec![Action::OpenOverlay(Overlay::Learning)]
         }
-        Command::LessonAccept(name) => {
-            vec![Action::LessonAccept { name }]
-        }
-        Command::LessonReject(name) => {
-            vec![Action::LessonReject { name }]
-        }
-        Command::Mode(mode) => {
-            vec![Action::SwitchMode(mode)]
+        Command::McpOpen => {
+            vec![Action::OpenOverlay(Overlay::Mcp)]
         }
         Command::ClearConfirm => {
             vec![Action::OpenOverlay(Overlay::ClearConfirm)]