界面渲染 only takes effect at Server startup, so the setting already told the
user to restart the IME process but offered no way to do it outside the
Ctrl+Shift+Alt+R developer shortcut. Add a 重启 button in the same section.
Settings runs in its own process, so the request travels the Aux pipe — the
supported cross-integrity control path the config notifications already use —
and the Server exits with the Watchdog restart code. The shortcut and the
button now share RestartServerProcess().
The Google-pinyin whole-sentence candidate is inserted at index 0 in both
quanpin and shuangpin, so it is what Space commits. All four construction
sites built it without a canonical quanpin reading, so when it finished a
word-creation session update_creating_word_progress() had no reading to
join and can_store stayed false: the prefix plus the sentence went to the
host app but were never learned.
Carry the converted quanpin segmentation on those candidates, and extract
the early-return storage condition into a testable predicate.