scaffold: Vue 3 frontend — router, stores, views, composables, layouts

Complete frontend skeleton: Vite + Vue 3 + TypeScript + Tailwind CSS,
Pinia stores (auth, server, wipe, plugins), authenticated API composable,
full route tree with auth guards, DashboardLayout with sidebar nav,
23 view stubs across auth/admin/public, all TypeScript interfaces.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?