Upstream bronter/wgpu_native_zig hasn't migrated to Zig 0.16
(last commit 2025-07, before 0.16 existed). snorm-dev/wgpu_native_zig
PR #46 to bronter is open + clean + mergeable (opened 2026-05-23) but
not yet reviewed by the maintainer.

Pin directly to snorm-dev's branch SHA so our PR #228 can land. Repin
to bronter/main once #46 merges.

Was: apotema/wgpu_native_zig@fb54d9c8 (also pre-0.16)
Now: snorm-dev/wgpu_native_zig@8aef4a98 (Zig 0.16 migration)

Reference: bronter/wgpu_native_zig#46

* chore(wgpu): build cleanly on Zig 0.16.0 (closes #220)

Mirrors PR #218's sokol sweep for the wgpu backend:

- `src/audio.zig:loadWav` + `src/gfx.zig:loadTexture` — swap
  `std.fs.cwd().openFile` for libc `fopen` / `fread` / `fclose` in the
  legacy path-based one-shot loaders. Zig 0.16 retired `std.fs.cwd()`
  in favour of `std.Io.Dir.cwd()` (requires an `Io` parameter threaded
  through). Production code goes through caller-provided byte buffers
  (`decodeImage`, `wav_parser.parseWav`) and never touches the FS, so
  threading `Io` through the whole backend for two legacy loaders is
  overkill.
- `build.zig` — add `link_libc = true` on the `gfx` and `audio`
  modules so the libc swap links. These modules previously didn't
  link libc (no native deps), so this is a new opt-in. Switch
  `b.dependency("wgpu_native_zig", ...)` to `b.lazyDependency` since
  Zig 0.16 panics on `b.dependency` for a `lazy = true` dep.
- `src/wav_parser.zig:202` — `std.ArrayList(u8) = .{}` -> `.empty`.
  Zig 0.16 drops the default-fields shape for the unmanaged
  ArrayList, requiring the named sentinel. This blocked
  `zig build test`.
- `example/build.zig` — move `linkLibrary` / `linkSystemLibrary` /
  `addLibraryPath` from `*Build.Step.Compile` onto `exe.root_module`
  (0.16 moved those helpers onto `*Build.Module`). `linkSystemLibrary`
  on `*Module` now takes an extra options struct; passing `.{}`.
- `build.zig.zon` (both) — `minimum_zig_version` 0.15.2 -> 0.16.0.

Environmental blocker (called out in build.zig + PR body): upstream
`apotema/wgpu_native_zig` @ fb54d9c8 is not yet Zig 0.16 compatible —
its own build.zig calls `linkFramework` / `addLibraryPath` /
`addObjectFile` on `*Compile`, which 0.16 moved onto `*Module`. Zig
0.16's build runner pre-compiles every transitive build.zig, so any
`zig build` subcommand hits those upstream errors before our build
function runs. Fixing that fork is a sibling-repo concern; this patch
keeps the assembler-side surface 0.16-ready so the migration lands as
soon as the fork catches up.

Verification:

- `zig ast-check` clean on all modified files.
- `zig test src/wav_parser.zig` — 14/14 pass (regression lock for
  #12 still green).
- `zig build-obj src/audio.zig -lc` — compiles clean (validates the
  libc swap in isolation).
- `zig build` / `zig build test` blocked by the upstream
  `wgpu_native_zig` 0.16 incompatibility described above (not
  introduced here — present on origin/main too).
- Example `zig build` not reached (same upstream block, plus Dawn
  prebuilt unavailable on this host).

Scope: only `backends/wgpu/`. Does not touch sibling backends (each
has its own ticket).

* chore(wgpu): pin wgpu_native_zig to snorm-dev's Zig 0.16 PR branch

Upstream bronter/wgpu_native_zig hasn't migrated to Zig 0.16
(last commit 2025-07, before 0.16 existed). snorm-dev/wgpu_native_zig
PR #46 to bronter is open + clean + mergeable (opened 2026-05-23) but
not yet reviewed by the maintainer.

Pin directly to snorm-dev's branch SHA so our PR #228 can land. Repin
to bronter/main once #46 merges.

Was: apotema/wgpu_native_zig@fb54d9c8 (also pre-0.16)
Now: snorm-dev/wgpu_native_zig@8aef4a98 (Zig 0.16 migration)

Reference: bronter/wgpu_native_zig#46

7 PRs since v0.34.1:
- #225 fix(raylib): takeScreenshot handles absolute paths (closes #224)
- #230 fix(raylib): replace rename trick with direct libc write
       (closes #229 — Linux EXDEV + Windows compile + Ubuntu X11)
- #231 fix(sdl): SDL_DISABLE_ARM_NEON_H for Zig 0.16 arm_neon.h mismatch
- #226 chore(backends): Zig 0.16 sweep on sdl + raylib + null (closes #221)
- #227 chore(bgfx): build cleanly on Zig 0.16.0 + zbgfx pin bump
       (closes #219)
- #228 chore(wgpu): build cleanly on Zig 0.16.0 + snorm-dev pin
       (closes #220, refs bronter/wgpu_native_zig#46)
- #216 fix(codegen): sanitize plugin idents in resolve() emit (closes #212)