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/src/help/appVersion.ts

@@ -0,0 +1,11 @@
+declare const __APP_VERSION__: string;
+
+/** Sidebar / about label — server build wins, else Vite-injected package.json version. */
+export function formatAppVersion(serverVersion?: string | null): string {
+  const raw = (serverVersion?.trim() || __APP_VERSION__ || '1.0.0').replace(/^v/i, '');
+  return `v${raw}`;
+}
+
+export function readPackageVersion(): string {
+  return __APP_VERSION__;
+}