v16.2.0-canary.51

**v16.2.0-canary.51**

Core Changes segment cache: fix segment cache normalizer: #90111 Handle null history.state in client-side router popstate handler: #90083 Don't parse default postponedsizelimit: #89906 Turbopack: handle invalid RSC imports via importmap: #88146 [create-next-app] Improve AGENTS.md prompt wording: #90118 ensure maxPostponedStateSize is always respected: #90060 Upgrade React from 6066c782-20260212 to 4842fbea-20260217: #90144 [fragment-scroll] Stop focusing the first focusable host descendant: #89903 fix: normalize loopback only in hostname: #90158 Only error for sync IO after runtime in segments that would be runtime prefetched: #89979 Misc Changes refactor: fix non-determinism in resolve package: #90058 Update Rspack development test manifest: #90074 Update Rspack production test manifest: #90073 test: extend production-browser-sourcemaps test: #89945 Turbopack: use file_content.hash() consistently: #90078 [test] Current behavior of focus after next/link navigation: #89959 Turbopack: Enable tree-shaking for dynamic imports with destructuring: #89683 test: Don't run integration tests twice for Turbopack : #83335 Simplify how json imports work by turning it into a source transform: #89631 Update Rspack production test manifest: #90120 Update Rspack development test manifest: #90121 Credits Huge thanks to @lukesandberg, @vercel-release-bot, @ztanner, @timneutkens, @mischnic, @gaojude, @eps1lon, @sokra, and @gnoff for helping!

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