Wails v3 alpha.94 switched its default Linux backend from GTK3 +
WebKit2GTK 4.1 to GTK4 + WebKitGTK 6.0 (the GTK3 path is now gated
behind a `gtk3` build tag). cgo files that the binary, the tests, and
the lint job all parse now request `pkg-config --cflags gtk4
webkitgtk-6.0 ...`, so the existing libgtk-3-dev + libwebkit2gtk-4.1
apt deps no longer satisfy them — lint, unit tests, and the linux
release build all fail with `Package 'gtk4' ... not found`.
Replace the apt deps across the four workflows that build/lint the
client tree (golangci-lint, golang-test-linux, release, and the wasm
lint job that also walks client/) with libgtk-4-dev + libwebkitgtk-6.0-dev
+ libsoup-3.0-dev. Both packages are available from jammy (22.04 LTS)
onwards, so existing ubuntu-22.04 runners stay valid.
Upgrade Go toolchain and golang.org/x/* deps to 1.24.10, standardize GitHub Actions to derive Go version from go.mod and adjust checkout ordering, raise WASM size limit to 55 MB, update FreeBSD tarball and gomobile refs, fix a few format-string/logging calls, treat usernames ending with $ as system accounts, and add Windows tests.
