fix(nuxt): Re-export all exported bindings (#14086)

This was brought up here:
#14064

Only the "root bindings" were exported, which led to not re-exported
functions that were imported from another file before they were exported
(like firebase `server`).

packages/nuxt/src/vite/addServerConfig.ts

@@ -1,7 +1,7 @@
 import * as fs from 'fs';
 import { createResolver } from '@nuxt/kit';
 import type { Nuxt } from '@nuxt/schema';
-import { consoleSandbox } from '@sentry/utils';
+import { consoleSandbox, flatten } from '@sentry/utils';
 import type { Nitro } from 'nitropack';
 import type { InputPluginOption } from 'rollup';
 import type { SentryNuxtModuleOptions } from '../common/types';
@@ -129,8 +129,9 @@ function wrapEntryWithDynamicImport(resolvedSentryConfigPath: string): InputPlug
 
         moduleInfo.moduleSideEffects = true;
 
-        // The key `.` in `exportedBindings` refer to the exports within the file
-        const exportedFunctions = moduleInfo.exportedBindings?.['.'];
+        // `exportedBindings` can look like this:  `{ '.': [ 'handler' ], './firebase-gen-1.mjs': [ 'server' ] }`
+        // The key `.` refers to exports within the current file, while other keys show from where exports were imported first.
+        const exportedFunctions = flatten(Object.values(moduleInfo.exportedBindings || {}));
 
         // The enclosing `if` already checks for the suffix in `source`, but a check in `resolution.id` is needed as well to prevent multiple attachment of the suffix
         return resolution.id.includes(`.mjs${SENTRY_WRAPPED_ENTRY}`)