Core Changes

• Add browser devtool inspect url copy button to dev overlay: #69357
• Lazily init fetch dedupe cache: #69492
• Turbopack build: Fix middleware matchers implementation: #69602
• chore(metadata): add clarifying comment: #69549
• Remove unsupported providerImportSource option: #69609
• fix: clientComponentLoading span type: #69295
• Fix typos: #69568
• fix(eslint): allow typescript-eslint v8: #68807
• Allow external image urls with _next/image pathname to be rendered via Image component: #69586

Misc Changes

• Turbopack: emit single CSS chunk per page: #69219
• feat: Report correct errors for missing use client in global-errors.ts: #69583
• Turbopack build: Implement regions and assets field in manifest for middleware: #69534
• Docs: Rewrite cookies page to follow template, add missing methods: #69614
• Explicitly assert on errors instead of the error number: #69512
• Match peer dependencies in rsc-binary tests: #69515
• fix(scripts): correct globbing, cargo colors, patch path: #69624
• ci: only trigger slack webhook from canary: #69632
• Skip devlow benchmark step for forks: #69633
• perf: Cache Rust Regexes: #69585

Credits

Huge thanks to @mischnic, @kdy1, @timneutkens, @delbaoliveira, @eps1lon, @huozhi, @ForsakenHarmony, @samcx, @lubieowoce, @ProchaLu, @luismiramirez, @ijjk, @omahs, @theoludwig, and @abhi12299 for helping!