fix(cask): parse font artifacts in Homebrew API JSON

[olegdizus]

Fixes #331

The artifact-parsing if/else chain in parseCaskJsonArch (src/api/client.zig) handled app, binary, pkg, uninstall, suite, and artifact stanzas but had no branch for font. Font artifact objects (e.g. {"font":["ttf/FiraCode-Bold.ttf"],...}) fell through silently, leaving the parsed Cask with an empty artifacts array. Font casks then reported install success while copying no files to ~/Library/Fonts/.

PR #306 fixed the same class of bug for suite and artifact (issue #303); font was missed. The downstream install code (installCask, installZipFontsDirect, fontArtifactsOnly) already handles .font artifacts correctly — this branch makes them reachable.

Fix

Add a font branch to the artifact-parsing chain, following the same pattern as app/pkg:

} else if (obj.get("font")) |font_val| {
    if (font_val == .array) {
        for (font_val.array.items) |f| {
            if (f == .string) {
                try artifacts.append(alloc, .{ .font = try rewriteVersion(alloc, f.string, root_version, version) });
            }
        }
    }
}

Verification

Built and tested locally on v0.1.198 with Zig 0.16.0.

Before the fix, nb install --cask font-fira-code reported success but phase=artifacts ms=0.00 (empty loop) and no files landed in ~/Library/Fonts/.

After the fix, the fast path fires (phase=fast_install) and all fonts are extracted:

$ nb install --cask font-fira-code
==> Installed Fira Code 6.2
==> Done in 513.0ms

$ ls ~/Library/Fonts/Fira*
FiraCode-Bold.ttf    FiraCode-Light.ttf   FiraCode-Medium.ttf
FiraCode-Regular.ttf FiraCode-Retina.ttf  FiraCode-SemiBold.ttf
FiraCode-VF.ttf

$ nb info --cask font-fira-code
  artifacts:
    font: ttf/FiraCode-Bold.ttf
    font: ttf/FiraCode-Light.ttf
    font: ttf/FiraCode-Medium.ttf
    font: ttf/FiraCode-Regular.ttf
    font: ttf/FiraCode-Retina.ttf
    font: ttf/FiraCode-SemiBold.ttf
    font: variable_ttf/FiraCode-VF.ttf

Also verified with font-cascadia-code-nf.

zig build test passes, including a new regression test for multi-stanza font cask parsing.