Tree selector improvements: active line highlight and tool filter

- Add inverse background highlight for selected/active line
- Add 'no-tools' filter mode to hide tool results
- Add isShiftCtrlO to cycle filters backwards
- Filter order: default → no-tools → user-only → labeled-only → all

packages/tui/src/keys.ts

@@ -304,6 +304,14 @@ export function isCtrlO(data: string): boolean {
 	return data === RAW.CTRL_O || data === Keys.CTRL_O || matchesKittySequence(data, CODEPOINTS.o, MODIFIERS.ctrl);
 }
 
+/**
+ * Check if input matches Shift+Ctrl+O (Kitty protocol only).
+ * Ignores lock key bits.
+ */
+export function isShiftCtrlO(data: string): boolean {
+	return matchesKittySequence(data, CODEPOINTS.o, MODIFIERS.shift + MODIFIERS.ctrl);
+}
+
 /**
  * Check if input matches Ctrl+P (raw byte or Kitty protocol).
  * Ignores lock key bits.