Enhanced Weasel Wubi

Enhanced support for Weasel (小狼毫/Rime) input method.

Features

Mode switch announcements: Speaks mode changes (中/英, 全/半角, 中/英标点).
Commit deduplication: Text committed via space/enter is read only once.
Chinese punctuation in browsers: Reads Chinese punctuation (,。；：、？!) correctly even in Chrome/Edge.
Candidate description trimming: Shows only short descriptions, dropping long dictionary entries.
Typed character silence in Chinese mode: All typed characters are silent while composing in Chinese, so pinyin letters aren't spoken.