Replace the standalone "GPUStack" brand word with a target brand
(default MesaStack) across user-facing text. Word-boundary + case-
sensitive matching deliberately skips functional references: lowercase
gpustack (npm pkg/URLs/paths/k8s ns), ALL-CAPS GPUSTACK_ constants,
JS identifiers (getGPUStackPlugin etc.), and X-* HTTP headers. A
line-level skip list protects backend-contract strings matched at
runtime (e.g. the model-file-not-found startsWith check).
Re-run on each new v<version>-lofyer branch after syncing upstream.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
