Run clang-format (the repo's .clang-format: LLVM base, 120 cols, tabs,
Allman functions) over every source file so the tree is formatter-clean.
Whitespace only -- no behavior change; full x64 + x86 suites pass.
Also set SortIncludes: false in .clang-format. Windows include order is
load-bearing (windows.h must precede tlhelp32.h / mmreg.h / xinput.h /
dinput.h; winsock2.h must precede windows.h), and the default
alphabetical sort reorders tlhelp32.h ahead of windows.h -- a build
break. Leaving order alone keeps the manual, correct grouping.
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.
