BlackMark c684a15fb9 Add a unit test for the shared text helpers ...

contains_ci and narrow/widen were centralized into shared headers
(ui/text_match.hpp, util/utf8.hpp) during the cleanup but had no
focused test, unlike the project's other pure-logic helpers. Cover the
filter contract the Log/Injection panels depend on (empty/null needle
matches all, case-insensitivity both directions, boundary substrings,
non-matches) and a narrow<->widen round-trip.

The non-ASCII round-trips (cafe.exe, CJK) would fail against the old
lossy `c & 0x7F` narrowing this cleanup replaced, so the test guards
that fix, not just the happy path. Registered as test #34; suite green.

2026-07-12 10:02:53 +02:00

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