next.js

bf1f6e85 - [ts-next-plugin] fix: validate metadata node before checking type (#78414)

[ts-next-plugin] fix: validate metadata node before checking type (#78414) ### What? Received error from TS Log: ```txt Cannot read properties of undefined (reading 'type') TypeError: Cannot read properties of undefined (reading 'type') at hasCorrectType (…/next@15.4.0-canary.3…/next/dist/server/typescript/rules/metadata.js:212:14) at Object.getSemanticDiagnosticsForExportDeclaration (… ``` ### Why? `declaration` can be undefined but was passed via `as` assertion. ### How? Remove the `as` assertion and correctly validate the `declaration.`