Add shortcut to append blank line to file end

README.md

@@ -198,6 +198,7 @@ See [CLOUD.md](CLOUD.md) for detailed cloud documentation.
 | **Ctrl+Y**    | Redo                                    |
 | **Tab**       | Indent (2 spaces)                       |
 | **Shift+Tab** | Unindent                                |
+| **Ctrl+Shift+End** | Add blank line at end of file          |
 | **Enter**     | New line                                |
 | **Backspace** | Delete character (joins lines at start) |
 

src/components/TextBuffer.jsx

@@ -4,6 +4,13 @@ import { highlightMarkdownLine } from '../utils/syntaxHighlight.js';
 
 let lineIdCounter = 0;
 
+export function appendBlankLineToEnd(existingLines) {
+  return [
+    ...existingLines,
+    { id: `line-${lineIdCounter++}`, text: '' },
+  ];
+}
+
 /**
  * Wrap a line of text to fit within maxWidth, breaking at word boundaries
  */
@@ -437,7 +444,17 @@ export default function TextBuffer({ content, onChange, isFocused = true, viewpo
     }
 
     if (key.end) {
-      if (key.ctrl) {
+      if (key.ctrl && key.shift) {
+        // Ctrl+Shift+End: Add new line at end of file and move cursor there
+        const newLines = appendBlankLineToEnd(lines);
+
+        saveToHistory(lines, cursorLine, cursorCol);
+        setLines(newLines);
+        const lastLine = newLines.length - 1;
+        setCursorLine(lastLine);
+        setCursorCol(0);
+        setSelection(null);
+      } else if (key.ctrl) {
         // Ctrl+End: Go to end of file
         const lastLine = lines.length - 1;
         setCursorLine(lastLine);

tests/components/TextBuffer.test.jsx

@@ -0,0 +1,19 @@
+import { describe, it, expect } from '@jest/globals';
+import { appendBlankLineToEnd } from '../../src/components/TextBuffer.jsx';
+
+describe('TextBuffer helpers', () => {
+  it('appendBlankLineToEnd adds a blank line without mutating original array', () => {
+    const originalLines = [
+      { id: 'line-1', text: 'Hello' },
+      { id: 'line-2', text: 'World' },
+    ];
+
+    const result = appendBlankLineToEnd(originalLines);
+
+    expect(result).not.toBe(originalLines);
+    expect(result).toHaveLength(originalLines.length + 1);
+    expect(result.slice(0, originalLines.length)).toEqual(originalLines);
+    expect(result[result.length - 1].text).toBe('');
+    expect(result[result.length - 1].id).toMatch(/^line-/);
+  });
+});