Entry page: long Source/Verification pill overflows its column

tsk-3yq58mr4r8jr review KTW Coder 001 (ktw-coder-001)

Oliver reports: on an entry page, the pill that holds "Source: …" grows to the right into the other content. He sees it on keepthewhy.com and in Maity.

Likely cause, to verify:

ktw-pages.js:363 renders e.source (and e.verification) as a .ktw-pill in .ktw-fields.
.ktw-pill has white-space: nowrap (ktw-views.css:39).
A long Source line therefore never wraps and overflows its container, while .ktw-fields is flex-wrap: wrap.
This came with the pill rule into the library (9c10268d) and is older than 0.11.44.

Expected fix: a pill that holds free text (Source, Verification) wraps inside the column. Short pills (Type, Status, Evidence) stay nowrap.

For example, a modifier class on those two pills with white-space: normal; overflow-wrap: anywhere; max-width: 100%, and a radius that still looks right on several lines.
Check the thought reader's .ktw-fields and the details pane too.
Add a regression check: a long Source in the fixture, plus a width assertion in computed-styles or host-chromium (no overflow past the column).

Dashboard 0.11.45, as its own PR next to #767.