Add tests/kicad/eeschema-url-regex.spec.ts: opens a text_box-bearing
schematic with a real URL via Module.kicadOpenFile and asserts the
URL-detection wxRegEx compile no longer fails — no "Invalid regular
expression" in the console and no error dialog. A pre-fix build renders the
same text_box, hits IsURL() -> the failing static regex, and fires both
signals.
Bumps the wxwidgets submodule to the wxConvLibc->UTF-8 emscripten fix.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
6681e0dd82