initial scaffold: vue 3 + vite 8 + shadcn-vue + tailwind 4

Wires pinia, vue-router, vue-i18n, vee-validate/zod, shadcn-vue
(reka-ui), tailwind 4 via @tailwindcss/vite. Sample HomeView
proves i18n + pinia + tailwind. Optional nostr/lnbits feature
folders ship as documentation only — deps install on opt-in.

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

tsconfig.app.json

@@ -0,0 +1,11 @@
+{
+  "extends": "@vue/tsconfig/tsconfig.dom.json",
+  "include": ["env.d.ts", "src/**/*", "src/**/*.vue"],
+  "exclude": ["src/**/__tests__/*"],
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  }
+}