antd-zig source uses Zig APIs from incompatible versions; doesn't compile on any released Zig

[Nic-dorman]

Bug

antd-zig/src/ can't be built against any released Zig (0.14.x or 0.15.x). The source mixes APIs that don't co-exist in any tagged release:

• std.ArrayList(u8) = .empty initializer — introduced in Zig 0.15-dev (not present in 0.14.x).
• client.open(method, uri, .{ ... }) on std.http.Client — present in 0.14.x, removed/renamed in 0.15.x.

build.zig.zon declares minimum_zig_version = "0.14.0", but neither 0.14.x nor 0.15.x can satisfy both calls.

Reproductions

Zig 0.14.1

src/json_helpers.zig:213:36: error: struct 'array_list.ArrayListAligned(u8,null)' has no member named 'empty'
    var list: std.ArrayList(u8) = .empty;
                                  ~^~~~~

Zig 0.15.2

src/antd.zig:102:25: error: no field or member function named 'open' in 'http.Client'
        var req = client.open(method, uri, .{
                  ~~~~~~^~~~~

Suggested fix

Pin to a single supported Zig version and audit the source for that target. Most likely Zig 0.14.x (the documented minimum) — that requires reverting the .empty initializers back to std.ArrayList(u8).init(allocator) (or equivalent). All std.ArrayList callsites in src/json_helpers.zig use the .empty form, so this is a sweep of a single file.

Alternatively: bump minimum_zig_version to 0.15.x and replace the http.Client.open calls with the new API (std.http.Client.request / similar) — bigger surface.

Adjacent

Also flagged in #70 (the arity-mismatch fix): the arity bug in 02-data.zig and 06-private-data.zig is real and type-correct, but I can't verify execution end-to-end here because of this compile error. The PR for #70 is still correct on the call-site shape; #70 should not block on this.

Environment

• Tried with both Zig 0.14.1 and 0.15.2, installed via mise
• antd-zig at main (today's clone), Ubuntu 24.04 LXC

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Found while landing the arity fix from #70.