fix: correct session help subtitle binding labels

src/renderer/modals/session-help.test.ts

@@ -0,0 +1,29 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { SPECIAL_COMMANDS } from '../../config/definitions';
+import {
+  describeSessionHelpCommand,
+  formatSessionHelpKeybinding,
+} from './session-help.js';
+
+test('session help describes sub-seek commands as subtitle-line navigation', () => {
+  assert.equal(describeSessionHelpCommand(['sub-seek', 1]), 'Jump to next subtitle');
+  assert.equal(describeSessionHelpCommand(['sub-seek', -1]), 'Jump to previous subtitle');
+});
+
+test('session help describes subtitle-delay shift special commands separately from sub-seek', () => {
+  assert.equal(
+    describeSessionHelpCommand([SPECIAL_COMMANDS.SHIFT_SUB_DELAY_TO_NEXT_SUBTITLE_START]),
+    'Shift subtitle delay to next cue',
+  );
+  assert.equal(
+    describeSessionHelpCommand([SPECIAL_COMMANDS.SHIFT_SUB_DELAY_TO_PREVIOUS_SUBTITLE_START]),
+    'Shift subtitle delay to previous cue',
+  );
+});
+
+test('session help formats bracket keybindings as physical keys', () => {
+  assert.equal(formatSessionHelpKeybinding('Shift+BracketRight'), 'Shift + ]');
+  assert.equal(formatSessionHelpKeybinding('Shift+BracketLeft'), 'Shift + [');
+});