[bhouston]

Closes #55

Changes

• pnpm lint now runs oxlint --type-aware --type-check .; added oxlint-tsgolint.
• tsgolint only type-checks files covered by the nearest tsconfig.json, and tests/test/ were excluded (checked with default options, no three shims). Split each of three-ntc and three-ntc-trainer into tsconfig.build.json (previous config: build, project references, excludes tests, so published output is unchanged) and a lint/IDE tsconfig.json (no emit, includes src, tests and test/). Root references, cli/website references and package build/dev scripts point at tsconfig.build.json.
• website tsconfig no longer excludes tests (and includes test/performance-metrics.ts); new test/tsconfig.json and test/vitest-commands.d.ts (types the custom recordMetric/benchmarkConfig browser commands); three/addons/* shim added for three-ntc.

Fixed (real issues surfaced)

• no-redundant-type-constituents (26): X | null where X is the repo's deliberate any alias for untyped three; redundant constituent dropped.
• floating promises: void main(), void test(...) in release.test.mjs, one in NTCEndToEnd.gpu.test.
• Stale types now visible: NTCCpuModel.wrap is never read, now optional; MLPLayer weights/biases accept number[] (trainer models use plain arrays); NTCTrainer quantization accepts the partial NTCQuantizationOptions it already resolves; channelActivations accepts undefined entries (NTCActivation includes undefined and consumers handle it); NTCTrainProgress.cpuModel typed as NTCGridPyramidModel instead of any.
• Test fixes: typed renderer, (url: string), one targeted @ts-expect-error for the deliberately invalid activation in NTCLoader.test.

Validation

pnpm build && pnpm tsc && pnpm lint && pnpm exec oxfmt --check . && pnpm test + release:check pass locally (61 unit tests; verified dist has no test files). Lint: 0 errors, 164 warnings. CI already runs lint after build.

tsc vs lint

• tsc -b --force ~1.3s; pnpm lint ~1.7s (warm).
• Injected a type error in three-ntc, three-ntc-trainer, website, cli, test/gpu-helpers.ts and a gpu test: lint caught all six.
• Nothing tsc reports that lint misses; lint additionally covers gpu tests and test/, which tsc never saw. --type-check could replace pnpm tsc for checking if the build-only config stays for emit.

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[bhouston]

CI note: all checks pass except GPU (WebGPU in headless Chromium), which also fails on main (push run 41155676999) and on the other recent PRs (#51 and #52 branches), so it is pre-existing and unrelated (SwiftShader CI timeouts). Not merging until that is addressed or the owner says to proceed.