fix(tui): add OSC 8 hyperlinks for wrapped URLs (#17814)

* feat(tui): add OSC 8 hyperlinks to make wrapped URLs clickable

Long URLs that exceed terminal width get broken across lines by pi-tui's
word wrapping, making them unclickable. Post-process rendered markdown
output to add OSC 8 terminal hyperlink sequences around URL fragments,
so each line fragment links to the full URL. Gracefully degrades on
terminals without OSC 8 support.

* tui: harden OSC8 URL extraction and prefix resolution

* tui: add changelog entry for OSC 8 markdown hyperlinks

---------

Co-authored-by: Vincent Koc <vincentkoc@ieee.org>

CHANGELOG.md

@@ -726,6 +726,7 @@ Docs: https://docs.openclaw.ai
 - TUI/Windows: coalesce rapid single-line submit bursts in Git Bash into one multiline message as a fallback when bracketed paste is unavailable, preventing pasted multiline text from being split into multiple sends. (#4986) Thanks @adamkane.
 - TUI: suppress false `(no output)` placeholders for non-local empty final events during concurrent runs, preventing external-channel replies from showing empty assistant bubbles while a local run is still streaming. (#5782) Thanks @LagWizard and @vignesh07.
 - TUI: preserve copy-sensitive long tokens (URLs/paths/file-like identifiers) during wrapping and overflow sanitization so wrapped output no longer inserts spaces that corrupt copy/paste values. (#17515, #17466, #17505) Thanks @abe238, @trevorpan, and @JasonCry.
+- TUI: render assistant markdown URLs with OSC 8 hyperlinks (including wrapped URL fragments) so links stay clickable without breaking ANSI styling. (#17777) Thanks @Phineas1500.
 - CLI/Build: make legacy daemon CLI compatibility shim generation tolerant of minimal tsdown daemon export sets, while preserving restart/register compatibility aliases and surfacing explicit errors for unavailable legacy daemon commands. Thanks @vignesh07.
 
 ## 2026.2.14