[BUG] Bare-URL linkifier swallows fullwidth punctuation and CJK text into OSC 8 hyperlinks

Environment

• Claude Code v2.1.211 (native build, macOS)
• Any OSC 8-capable terminal (reproduced in an xterm.js-based terminal advertising FORCE_HYPERLINK=1; the same range bug also affects the plain underline styling in other terminals)

Description

When assistant output contains a bare URL immediately followed by fullwidth punctuation or CJK characters (very common in Chinese/Japanese responses, where no ASCII space separates the URL from （, ）, ：, ，, 。), the URL auto-linkifier extends the link through the CJK text until the next whitespace. Both the underline styling and the OSC 8 URI include the trailing CJK characters, so clicking the link opens a broken URL.

Examples from real output:

• PR: https://github.com/sgl-project/sglang/pull/31494（two commits） -> link/URI becomes https://github.com/sgl-project/sglang/pull/31494（two
• （preview: http://localhost:6420）： -> link/URI becomes http://localhost:6420）：

Root cause

The bare-URL detection regex in the message renderer is:

/https?:\/\/[^\s"'<>\\…\x00-\x1f]+/g

The negated class excludes whitespace, quotes, angle brackets, backslash, … (U+2026), and control chars — but not fullwidth punctuation (U+FF08 （, U+FF09 ）, U+FF1A ：, U+3002 。, ...) or CJK ideographs, so they all match until the next whitespace.

The trailing-trim pass only handles ASCII: it strips .,;:!? and unbalanced )/]/} (via a {")": "(", "]": "[", "}": "{"} pair map), so the fullwidth equivalents survive.

Steps to reproduce

1. Run claude in an OSC 8-capable terminal (or with FORCE_HYPERLINK=1).
2. Have the assistant output a line containing literally: see https://github.com/anthropics/claude-code/pull/123（two commits）
3. Hover/click the link.

Expected: link range and URI stop at .../pull/123.
Actual: link range and URI are .../pull/123（two; the opened URL is broken.

Suggested fix

Add fullwidth/CJK punctuation to the excluded class (the regex already special-cases …), or more robustly exclude all non-ASCII from the URL match tail — e.g. stop at [^\x21-\x7e] after the scheme — and/or extend the trailing-trim to the fullwidth counterparts （）：，。？！.