fix: ensures singleworkspace falls back to the name 'default' as expected in all contexts (#8228)

Author: snorrees

packages/sanity/src/core/config/__tests__/resolveConfig.test.ts

@@ -39,7 +39,8 @@ describe('resolveConfig', () => {
 
     const [workspace] = await firstValueFrom(
       resolveConfig({
-        name: 'default',
+        //the default name should be 'default', in both the workspace and the unstable_sources
+        //name: 'default',
         dataset,
         projectId,
         auth: createMockAuthStore({client, currentUser: null}),

packages/sanity/src/core/config/prepareConfig.tsx

@@ -103,7 +103,7 @@ export function prepareConfig(
   const rootPath = getRootPath(options?.basePath)
   const workspaceOptions: WorkspaceOptions[] | [SingleWorkspace] = Array.isArray(config)
     ? config
-    : [config]
+    : [{...config, name: config.name ?? 'default'}]
 
   try {
     validateWorkspaces({workspaces: workspaceOptions})