feat(config): show default keybindings in generated example config (#64)

- Expand `keybindings` array in `config.example.jsonc` to list all built-in defaults instead of `[]`
- Inject `DEFAULT_KEYBINDINGS` into template when resolved config has an empty keybindings array
- Add regression tests for template parity, default binding compile/action mapping, overlay keyboard dispatch, and mpv plugin registration/dispatch
- Add fullscreen binding to docs shortcut tables and clarify keybindings can target mpv commands or session actions

src/config/config.test.ts

@@ -4,7 +4,13 @@ import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
 import { ConfigService, ConfigStartupParseError } from './service';
-import { DEFAULT_CONFIG, RUNTIME_OPTION_REGISTRY, deepMergeRawConfig } from './definitions';
+import {
+  DEFAULT_CONFIG,
+  DEFAULT_KEYBINDINGS,
+  RUNTIME_OPTION_REGISTRY,
+  deepMergeRawConfig,
+} from './definitions';
+import { parseConfigContent } from './parse';
 import { generateConfigTemplate } from './template';
 
 function makeTempDir(): string {
@@ -2218,3 +2224,12 @@ test('template generator includes known keys', () => {
     /"launchAtStartup": true,? \/\/ Launch texthooker server automatically when SubMiner starts\. Values: true \| false/,
   );
 });
+
+test('template generator shows built-in default keybindings in the keybindings array', () => {
+  const output = generateConfigTemplate(DEFAULT_CONFIG);
+  const parsed = parseConfigContent('config.example.jsonc', output) as {
+    keybindings?: unknown;
+  };
+
+  assert.deepEqual(parsed.keybindings, DEFAULT_KEYBINDINGS);
+});