Add AV/Defender tests and clear PROBLEMS.md antivirus rows.

Cover mining diagnostics JSON blockers, AV-Safe preset fields, defender_off error paths, and Calibrate exclusion .ps1 generation with Go + Vitest; honest AV limits already documented in settingHelp.

server/web/vite.config.ts

@@ -1,8 +1,14 @@
+import { readFileSync } from 'node:fs'
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
 
+const pkg = JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf8')) as { version: string }
+
 export default defineConfig({
   plugins: [react()],
+  define: {
+    __APP_VERSION__: JSON.stringify(pkg.version),
+  },
   resolve: {
     dedupe: ['react', 'react-dom'],
   },