[bug]: Scoped package aliases with multiple segments are truncated during import transformation

[naiane-bhn]

Describe the bug

When using scoped packages with multiple path segments in monorepo aliases (e.g., @package/ui/components), the shadcn CLI incorrectly truncates the alias to only the scope (e.g., @Package), causing broken imports in installed components.I intend to submit a PR for this issue. The fix involves updating the alias extraction logic in { transform-import.ts to properly detect and preserve multi-segment scoped packages.

Affected component/components

CLI - Import transformation logic

How to reproduce

Steps to reproduce:

Set up a monorepo with a scoped UI package named @company/ui (or any @scope/package format)
Configure components.json with multi-segment scoped aliases:

json   {
     "aliases": {
       "components": "@package/ui/components",
       "ui": "@package/ui/components/ui",
       "lib": "@package/ui/lib",
       "hooks": "@package/ui/hooks",
       "utils": "@package/ui/lib/utils"
     }
   }

Configure tsconfig.json with corresponding paths:

json   {
     "compilerOptions": {
       "paths": {
         "@package/ui/*": ["../../packages/ui/src/*"]
       }
     }
   }

Add a component from a custom registry or shadcn:

bash pnpm dlx shadcn@latest add button

Check the generated component imports

Expected behavior:

import { Button } from "@package/ui/components/ui/button";
import { cn } from "@package/ui/lib/utils";

Actual behavior:

import { Button } from "@package/components/ui/button";
import { cn } from "@package/lib/utils";

The /ui segment is lost, breaking the imports.

### Codesandbox/StackBlitz link

_No response_

### Logs

```bash

System Info

OS: macOS 14.x
Node: v20.x
Package Manager: pnpm 9.x
shadcn CLI: latest (3.x)
Browser: N/A (CLI issue)

Before submitting

• I've made research efforts and searched the documentation
• I've searched for existing issues