🧪 Add tests for doTry error handling fallback

This commit introduces new test cases for the `doTry` helper function.
It adds assertions to verify the format of warning logs and tests the error fallback behavior when a non-`Error` object is thrown.

Co-authored-by: zknpr <96851588+zknpr@users.noreply.github.com>

Author: google-labs-jules[bot]

tests/unit/helpers.test.ts

@@ -103,5 +103,13 @@ describe('doTry', () => {
     const result = doTry(() => { throw new Error('test error'); });
     assert.strictEqual(result, undefined);
     assert.strictEqual(warnMessages.length, 1);
+    assert.deepStrictEqual(warnMessages[0], ['[SQLite Explorer]', 'test error']);
+  });
+
+  it('should return undefined and log warning on string error', () => {
+    const result = doTry(() => { throw 'string error'; });
+    assert.strictEqual(result, undefined);
+    assert.strictEqual(warnMessages.length, 1);
+    assert.deepStrictEqual(warnMessages[0], ['[SQLite Explorer]', 'string error']);
   });
 });