Every tr() source string in the code and the forms is now the English
text, and French is a translation (qet_fr.ts) like the other languages.
Generated, not hand-edited: master ef795a21e5 converted by
qet-en-source (harness 4c4ddc9).
3144 messages get an English source, 665 already had one, 0 left French; 8 shared-wording pairs disambiguated.
C++: 2904 literals in 233 files. Forms: 809 strings in 65 files. All 34 .ts files re-keyed; qet_fr.ts filled.
lupdate check: PASS. What each of 38 languages shows, old vs new: same 118266, English instead of French 38433, comment fallback 51, differences 0.
Qt6's QFont::setWeight() now takes a QFont::Weight enum instead of
a raw int, so uic-generated code from the old <weight>75/50</weight>
XML properties fails to compile (worked on GCC via -fpermissive,
but hard error on Apple Clang for the macOS build).
<bold> is already set on all affected widgets, so <weight> was
redundant and can be dropped without any visual change.