Upgrade React from 7deda941-20250804 to 3958d5d8-20250807#200

austinderek wants to merge 6 commits intocanaryaustinderek/next.js:canaryfrom

update/react/19.2.0-canary-3958d5d8-20250807austinderek/next.js:update/react/19.2.0-canary-3958d5d8-20250807Copy head branch name to clipboard