Method handleMultiClick

src/ink/ink.tsx:1328–1340

* Handle a double- or triple-click at (col, row): select the word or * line under the cursor by reading the current screen buffer. Called on * PRESS (not release) so the highlight appears immediately and drag can * extend the selection word-by-word / line-by-line. Falls back to * char-mo

(col: number, row: number, count: 2 | 3)

   * char-mode startSelection if the click lands on a noSelect cell.
   */
  handleMultiClick(col: number, row: number, count: 2 | 3): void {
    if (!this.altScreenActive) return;
    const screen = this.frontFrame.screen;
    // selectWordAt/selectLineAt no-op on noSelect/out-of-bounds. Seed with
    // a char-mode selection so the press still starts a drag even if the
    // word/line scan finds nothing selectable.
    startSelection(this.selection, col, row);
    if (count === 2) selectWordAt(this.selection, screen, col, row);else selectLineAt(this.selection, screen, row);
    // Ensure hasSelection is true so release doesn't re-dispatch onClickAt.
    // selectWordAt no-ops on noSelect; selectLineAt no-ops out-of-bounds.
    if (!this.selection.focus) this.selection.focus = this.selection.anchor;
    this.notifySelectionChange();
  }

  /**
   * Handle a drag-motion at (col, row). In char mode updates focus to the