Core Changes

• [Segment Cache] Re-implement refresh reducer: #84426
• Upgrade React from fb2177c1-20251114 to 0972e239-20251118: #86263
• next analyze: Make ipv6 server links valid and normalize localhost: #86219
• fix: prevent fetch abort errors propagating to user error boundaries: #86277
• chore(turbopack-node): remove some outdated codes: #86111
• [devtools] Ensure Chrome DevTools workspace can connect with proxy rewrites: #86289
• Fix log log alignment in spinners: #86298
• fix: Rename proxy.js to middleware.js in NFT file: #86214

Misc Changes

• Update Rspack production test manifest: #86233
• [test] Update snapshots: #86288
• [test] Add failing test for useActionState with 'use cache': #86292
• [test] Disable flaky prefetching.stale-times test: #86299
• Update Rspack production test manifest: #86283
• Replace tuples with better suited data structures for server references: #86294

Credits

Huge thanks to @acdlite, @vercel-release-bot, @eps1lon, @wbinnssmith, @unstubbable, @ztanner, @xusd320, and @devjiwonchoi for helping!