chore(shadcn): fix tsconfig + components.json for current CLI

The shadcn-vue CLI (verified against
https://www.shadcn-vue.com/docs/installation/vite) requires path
aliases declared with both baseUrl and paths in tsconfig.json AND
tsconfig.app.json. Without baseUrl the CLI's resolvedPaths validator
fails with:

  Validation failed:
  - resolvedPaths: Required,Required,Required,Required,Required

(one Required per declared alias under "aliases" in components.json).

Also drop two stale keys from components.json that newer shadcn-vue
schema versions reject:

  - "framework": "vite"   → no longer part of the schema
  - "tailwind.config": "" → empty string fails validation; field is
                            optional for Tailwind 4 (no JS config file)

After this commit, "pnpm dlx shadcn-vue@latest add <component>"
succeeds out of the box.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tsconfig.app.json

@@ -4,6 +4,7 @@
   "exclude": ["src/**/__tests__/*"],
   "compilerOptions": {
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "baseUrl": ".",
     "paths": {
       "@/*": ["./src/*"]
     }