feat: right Arrow to modify selected command (#2453)

* right arrow functionality

* use or within match

* handles cursor not at end of line

* left cursor exits at start

* cargo fmt

Author: bboynton97

crates/atuin/src/command/client/search/cursor.rs

@@ -203,6 +203,10 @@ impl Cursor {
     pub fn start(&mut self) {
         self.index = 0;
     }
+
+    pub fn position(&self) -> usize {
+        self.index
+    }
 }
 
 #[cfg(test)]

crates/atuin/src/command/client/search/interactive.rs

@@ -205,6 +205,9 @@ impl State {
 
         let ctrl = input.modifiers.contains(KeyModifiers::CONTROL);
         let esc_allow_exit = !(self.tab_index == 0 && self.keymap_mode == KeymapMode::VimInsert);
+        let cursor_at_end_of_line =
+            self.search.input.position() == UnicodeWidthStr::width(self.search.input.as_str());
+        let cursor_at_start_of_line = self.search.input.position() == 0;
 
         // support ctrl-a prefix, like screen or tmux
         if !self.prefix
@@ -221,12 +224,14 @@ impl State {
             KeyCode::Esc if esc_allow_exit => Some(Self::handle_key_exit(settings)),
             KeyCode::Char('[') if ctrl && esc_allow_exit => Some(Self::handle_key_exit(settings)),
             KeyCode::Tab => Some(InputAction::Accept(self.results_state.selected())),
+            KeyCode::Right if cursor_at_end_of_line => {
+                Some(InputAction::Accept(self.results_state.selected()))
+            }
+            KeyCode::Left if cursor_at_start_of_line => Some(Self::handle_key_exit(settings)),
             KeyCode::Char('o') if ctrl => {
                 self.tab_index = (self.tab_index + 1) % TAB_TITLES.len();
-
                 Some(InputAction::Continue)
             }
-
             _ => None,
         };