fix(tui): prevent duplicate URL display for autolinked emails (#888)

Autolinked emails like user@example.com were rendered as
'user@example.com (mailto:user@example.com)' because the comparison
token.text === token.href failed (text lacks mailto: prefix).

Now strips mailto: prefix before comparing, so autolinked emails
display without redundant URL in parentheses.

packages/tui/CHANGELOG.md

@@ -6,6 +6,10 @@
 
 - `codeBlockIndent` property on `MarkdownTheme` to customize code block content indentation (default: 2 spaces)
 
+### Fixed
+
+- Autolinked emails no longer display redundant `(mailto:...)` suffix in markdown output
+
 ## [0.49.2] - 2026-01-19
 
 ## [0.49.1] - 2026-01-18