fix: handle mobile INI editing and silence timeout cleanup

Map INI to the CodeMirror properties language and fall back to plain text for unsupported modes. Reap the timeout watchdog immediately under stderr redirection to prevent Bash job notifications during cleanup.

Refs #3095, #3096

test/front/codemirror-language.test.cjs

@@ -0,0 +1,57 @@
+const assert = require('node:assert/strict');
+const path = require('node:path');
+const { createRequire } = require('node:module');
+const test = require('node:test');
+const { EditorState } = require('@codemirror/state');
+const load = require('../helpers/load-security-module.cjs');
+const { getCodeMirrorExtensions } = load(
+  path.resolve(__dirname, '../../src/utils/codemirror/language.ts'),
+);
+const { LANG_MAP } = load(path.resolve(__dirname, '../../src/utils/const.ts'));
+const languageRequire = createRequire(
+  require.resolve('@uiw/codemirror-extensions-langs'),
+);
+const { syntaxTree } = languageRequire('@codemirror/language');
+
+test('INI documents load and remain editable with CodeMirror syntax support', () => {
+  const doc = '; comment\n[section]\nkey=value\n';
+  const state = EditorState.create({
+    doc,
+    extensions: getCodeMirrorExtensions(LANG_MAP['.ini']),
+  });
+  assert.ok(syntaxTree(state).length > 0);
+  assert.ok(syntaxTree(state).topNode.firstChild, 'INI tokens were parsed');
+  const updated = state.update({
+    changes: {
+      from: doc.indexOf('value'),
+      to: doc.indexOf('value') + 5,
+      insert: 'edited',
+    },
+  }).state;
+  assert.equal(updated.doc.toString(), '; comment\n[section]\nkey=edited\n');
+});
+
+test('every configured script language supplies a valid CodeMirror extension', () => {
+  for (const mode of new Set(Object.values(LANG_MAP))) {
+    const extensions = getCodeMirrorExtensions(mode);
+    assert.equal(extensions.length, 1, mode);
+    assert.doesNotThrow(
+      () => EditorState.create({ doc: 'sample', extensions }),
+      mode,
+    );
+  }
+});
+
+test('unknown or empty languages fall back to editable plain text', () => {
+  for (const mode of ['', undefined, 'unknown', 'constructor', 'toString']) {
+    const extensions = getCodeMirrorExtensions(mode);
+    assert.deepEqual(extensions, []);
+    const state = EditorState.create({ doc: 'text', extensions });
+    assert.equal(
+      state
+        .update({ changes: { from: 4, insert: ' edited' } })
+        .state.doc.toString(),
+      'text edited',
+    );
+  }
+});