fix(core): keep trailing parenthesis in auto-glm finish message

[kwy404]

Summary

When parsing an auto-glm finish(...) action, extractValueAfter already strips the closing "), but the parser then removed one more trailing ) unconditionally. A message that ends with a parenthesis, such as finish(message="Deleted 3 items (all done)"), was returned as Deleted 3 items (all done. The extra ) is now only stripped when the response did not end with "), and a test covers this case.

Validation

• npx rstest run tests/unit-test/model-adapter/auto-glm/planning-action-parser.test.ts in packages/core (new test fails before the change, passes after)
• npx rstest run tests/unit-test/model-adapter/auto-glm in packages/core (the 4 prompt.test.ts snapshot mismatches are date/timezone related and also fail on main locally)
• npx nx build @midscene/core
• pnpm run type-check:tests (packages/core passes)
• pnpm run lint

Withdrawn at the repository owner's request.