Using 'home' as vite base breaks vitest on linux filesystems

Describe the bug

If you configure vite with

base: 'home',
test: {
  //
},

...

and run "vitest" on any linux file systems, you get the following error:

Error: Failed to load url /projects/vitest-dev-vitest-98qlmqvh/node_modules/vitest/dist/spy.js (resolved id: /projects/vitest-dev-vitest-98qlmqvh/node_modules/vitest/dist/spy.js). Does the file exist?
 ❯ loadAndTransform node_modules/vite/dist/node/chunks/dep-CB_7IfJ-.js:51969:17
 ❯ ViteNodeServer._transformRequest node_modules/vite-node/dist/server.mjs:561:16
 ❯ ViteNodeServer._fetchModule node_modules/vite-node/dist/server.mjs:523:17
 ❯ Proxy.fetch node_modules/vitest/dist/chunks/resolveConfig.RxKrDli4.js:6647:22
 ❯ EventEmitter.onMessage node_modules/vitest/dist/chunks/index.68735LiX.js:104:20

This bug is not reproducible on macOS or Windows and occurs on both npm and pnpm. Configuring the base as '/home/' or '/home' has the same effect.

Reproduction (StackBlitz uses Linux)

https://stackblitz.com/edit/vitest-dev-vitest-98qlmqvh?file=vite.config.ts

Start with the StackBlitz reproduction and the vite.config.ts configuration using base: 'home'; run Vitest on a Linux filesystem and trace the failed module resolution shown in the error. Compare behavior with '/home/' and '/home', then add coverage for the regression and confirm Vitest loads its module successfully without changing the macOS or Windows behavior.