Record what the Transformers.js 4.3.2 upgrade changes on the WebGPU side and what needs a browser check

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/plans/001-1-transformers-upgrade.md

@@ -109,9 +109,9 @@ onnxruntime-node 1.30.0), bun:test.
 
 ### Task 4: WebGPU-affecting changes (D-022, D-025/D-026) — inspection only
 
-- [ ] **Step 1:** Read 4.3.0/4.3.1/4.3.2 release notes and diff 4.2.0↔4.3.2 `src/` for
+- [x] **Step 1:** Read 4.3.0/4.3.1/4.3.2 release notes and diff 4.2.0↔4.3.2 `src/` for
   WebGPU/fp16/Firefox/Safari changes; check ort-web 1.31 dist for Gecko/fp16 handling.
-- [ ] **Step 2:** `D-WS1d` listing each item as "needs owner's browser check" with what to try
+- [x] **Step 2:** `D-WS1d` listing each item as "needs owner's browser check" with what to try
   (explicit WebGPU on Firefox for D-026; medium fp16 for D-022; Safari 26 WebGPU). No code change.
   Commit.