Description text overflow & wrapping logic issues with mixed CJK/Latin characters

### Describe the bug

The current text wrapping logic in src/common/fmt.js is flawed for CJK (Chinese/Japanese/Korean) and mixed content:

- Incorrect Split Logic: It aggressively splits text using the full-width comma (，) as a delimiter. This causes the comma to disappear and forces line breaks at incorrect positions.

- No Wrapping for Long Sentences: Long Chinese sentences without commas are not wrapped at all, causing them to overflow the card width.

- Mixed Content Overflow: The current width calculation does not properly handle the visual difference between full-width (CJK) and half-width (English) characters, leading to text overflowing the card borders.

### Expected behavior

The description text should wrap automatically based on visual width (pixel estimation) rather than specific punctuation, and should correctly handle mixed CJK/English content without overflowing.

### Screenshots / Live demo link


### Additional context

_No response_

Start by reading the wrapping and width-calculation logic in src/common/fmt.js, then reproduce the reported cases with long CJK text, full-width commas, and mixed CJK/Latin content using the linked examples. Done means punctuation is preserved, long sentences wrap, and mixed-content descriptions stay within the card borders.

Written by the indexing model from the issue text.