fix(test-utils): Inherit environment variables in Playwright webServer

The webServer config was setting `env: { PORT: ... }` which REPLACES
the parent environment instead of merging with it. This meant env vars
like NEXT_PUBLIC_SENTRY_SPOTLIGHT weren't being passed to the Next.js
dev server, causing the Spotlight auto-enablement test to fail.

By spreading `...process.env`, we now inherit all environment variables
from the CI runner, allowing the valueInjectionLoader to work correctly.

Author: BYK

.github/workflows/build.yml

@@ -993,15 +993,7 @@ jobs:
 
       - name: Set Spotlight env var for spotlight tests
         if: contains(matrix.test-application, 'spotlight')
-        run: |
-          echo "NEXT_PUBLIC_SENTRY_SPOTLIGHT=true" >> $GITHUB_ENV
-          echo "Setting NEXT_PUBLIC_SENTRY_SPOTLIGHT=true for spotlight test"
-
-      - name: Debug Spotlight env var
-        if: contains(matrix.test-application, 'spotlight')
-        run: |
-          echo "NEXT_PUBLIC_SENTRY_SPOTLIGHT=$NEXT_PUBLIC_SENTRY_SPOTLIGHT"
-          env | grep -i spotlight || echo "No SPOTLIGHT vars found"
+        run: echo "NEXT_PUBLIC_SENTRY_SPOTLIGHT=true" >> $GITHUB_ENV
 
       - name: Build E2E app
         working-directory: ${{ runner.temp }}/test-application

dev-packages/test-utils/src/playwright-config.ts

@@ -90,6 +90,9 @@ export function getPlaywrightConfig(
       stdout: 'pipe',
       stderr: 'pipe',
       env: {
+        // Inherit all environment variables from the parent process
+        // This is needed for env vars like NEXT_PUBLIC_SENTRY_SPOTLIGHT to be passed through
+        ...process.env,
         PORT: appPort.toString(),
       },
     });

packages/nextjs/src/config/withSentryConfig.ts

@@ -355,14 +355,6 @@ function getFinalConfigObject(
   const spotlightConfig =
     incomingUserNextConfigObject.env?.NEXT_PUBLIC_SENTRY_SPOTLIGHT ?? process.env.NEXT_PUBLIC_SENTRY_SPOTLIGHT;
 
-  // Debug: Log spotlight config detection
-  // eslint-disable-next-line no-console
-  console.log('[@sentry/nextjs] Spotlight config detection:', {
-    fromNextConfigEnv: incomingUserNextConfigObject.env?.NEXT_PUBLIC_SENTRY_SPOTLIGHT,
-    fromProcessEnv: process.env.NEXT_PUBLIC_SENTRY_SPOTLIGHT,
-    resolved: spotlightConfig,
-  });
-
   let turboPackConfig: TurbopackOptions | undefined;
 
   // IMPORTANT: Always construct turbopack config if the Next.js version supports it,