[ShahadatTest]

HTMLParser buffers incomplete character references until close(). HTMLConverter currently resets terminal styles before that final flush. For example, tail & emits its text after the bold style has already ended. Flush the parser first, then reset remaining styles in a finally block so a callback exception still closes the terminal style.

Both new buffered-tail and streaming-close regressions fail against original master. After the fix, those two tests, a callback-error cleanup control and the existing HTML test all pass. Coverage includes eight bold/italic/code/color buffered tails, streaming input, repeated close and unstyled text. The same behavior checks pass independently on Python 3.10. Flake8 and diff checks pass.

Full Python 3.12 unittest run: 72 tests, with the same 1 failure and 5 errors as pristine master's 69-test run on this Windows host (HOME/path checks, terminal/CLI capture and MockedProgram). No clean full suite or historical Python 2.7-3.9 matrix is claimed. This fixes parser finalization, independently of pending #92's color parsing and #93's anchor capture.

Found through source inspection and local reproduction for Aro 2ta koro (make two more contributions). Prepared with OpenAI Codex (GPT-6) assistance, including investigation, implementation, testing and PR preparation. No personal production usage or human code review is claimed.