enter and backspace handler added

src/app.rs

@@ -28,7 +28,11 @@ impl App {
         self.running = false;
     }
 
-    pub fn append_str(&mut self, text: char) {
-        self.content.push(text)
+    pub fn append_char(&mut self, c: char) {
+        self.content.push(c);
+    }
+
+    pub fn pop_char(&mut self) {
+        self.content.pop();
     }
 }

src/handler.rs

@@ -11,9 +11,15 @@ pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> {
                 app.quit();
             }
         }
+        KeyCode::Enter => {
+            app.append_char('\n');
+        }
+        KeyCode::Backspace => {
+            app.pop_char();
+        }
         _ => {
             if let KeyCode::Char(c) = key_event.code {
-                app.append_str(c)
+                app.append_char(c)
             }
         }
     }

src/tui.rs

@@ -35,7 +35,9 @@ impl<B: Backend> Tui<B> {
     }
 
     pub fn draw(&mut self, app: &mut App) -> AppResult<()> {
+        self.terminal.hide_cursor()?;
         self.terminal.draw(|frame| ui::render(app, frame))?;
+        self.terminal.show_cursor()?;
         Ok(())
     }