Enhance TUI and core functionality: add header rendering, improve message formatting, and refine provider/model handling logic. Update dependencies.

crates/owlen-core/src/session.rs

@@ -87,6 +87,11 @@ impl SessionController {
         &self.formatter
     }
 
+    /// Update the wrap width of the message formatter
+    pub fn set_formatter_wrap_width(&mut self, width: usize) {
+        self.formatter.set_wrap_width(width);
+    }
+
     /// Access configuration
     pub fn config(&self) -> &Config {
         &self.config