fix(web): link pill shows the distinguishing path, never wraps

[vnykmshr]

Reported from 1mb-dev/log: the link pill rendered the hostname alone, so two posts pointing at different repositories both read github.com. The path is what carries identity when the host is a platform, so it is kept — and when the result is too long, whole trailing segments are dropped rather than cutting a word in half (example.com/a/very/deep/path, not example.com/a/very/deep/path/th…). All seven bare-domain posts on the reference deployment render byte-identical to before.

Query strings are deliberately not shown. Distinguishing an HN item needs ~34 characters, which overflows the pill's ~32-character budget at 320px, and the card's title already carries primary identity — the pill is secondary context. Recorded in the helper's doc comment so it is a decision rather than an oversight.

Separately, the pill could already wrap or widen the page for reasons unrelated to this change: it was width: fit-content with no bound, no max-width, and no white-space rule. It now caps at its container and truncates on a single line. Verified in-browser on both surfaces at container widths from 256px (the real card width at a 320px viewport) down to 60px — pill height stays at one line box throughout, never exceeds its container, and the arrow never gets squeezed out. min-width: 0 on the text span is load-bearing: a flex item defaults to min-width: auto and refuses to shrink below its content, which silently defeats the ellipsis.

The helper stays registered as extractDomain — operator templates loaded via TEMPLATES_PATH call it by that name, and replace mode means a rename breaks them at render time.