v15.4.0-canary.3

Core Changes

• fix: amphtml-validator WASM errors (for real): #78379
• Turbopack: Remove next start --turbopack: #78384
• Upgrade React from 4a36d3ea-20250416 to bc6184dd-20250417: #78322
• [chore] remove dead code missing required error: #78403
• [ts-next-plugin] remove typescript vfs and related metadata plugin: #78237
• [ts-next-plugin] auto import metadata type: #78258
• [ts-next-plugin] warn to add correct type for metadata exports: #78254

Example Changes

• chore(examples): replace uuid dependency with crypto.randomUUID: #77901

Misc Changes

• Turbopack: Use content for async loader digests, not availability info: #78386
• refactor(turbo-tasks): Use ResolvedVc for CollectiblesSource: #78392
• Turbopack: add random_change test case to test persistent caching changes: #78211
• Update Turbopack development test manifest: #78399
• Update Turbopack production test manifest: #78400

Credits

Huge thanks to @lubieowoce, @wbinnssmith, @bgw, @sokra, @Juneezee, @huozhi, and @devjiwonchoi for helping!