Incorrect Dakuten Position in Half-Width Katakana (Japanese Input)

Version: edit.exe 1.2.1
Environment: Windows (Japanese locale)

Description:
When typing Japanese half-width katakana with dakuten/handakuten marks, the position of the marks is rendered incorrectly.
For example, when typing "ﾎﾟ", the dakuten (゜) appears before the base character instead of after, resulting in visually incorrect text order.

Expected behavior:
The dakuten should appear after the base character, forming the correct display of "ﾎﾟ".


https://github.com/user-attachments/assets/ace1e9ce-1e8a-4c99-8849-de12da1d53eb

Start by reproducing the issue in edit.exe 1.2.1 on Windows with a Japanese locale, entering the half-width Katakana example "ﾎﾟ". Trace the Japanese input and text-rendering path responsible for dakuten and handakuten placement; done means the marks render after their base character without affecting other input.

Written by the indexing model from the issue text.