fix: Fix multiple bugs with new authentication flow

electron/diagnostics/diagnostics.rules.ts

@@ -0,0 +1,24 @@
+import * as path from 'path';
+import type { PerfDiagEntry } from './diagnostics.models';
+
+export function pushRingBuffer<T>(items: readonly T[], item: T, capacity: number): T[] {
+  const next = [...items, item];
+
+  if (next.length <= capacity) {
+    return next;
+  }
+
+  return next.slice(next.length - capacity);
+}
+
+export function formatPerfDiagLine(entry: PerfDiagEntry): string {
+  return JSON.stringify(entry);
+}
+
+export function resolveDiagnosticsFilePath(userDataPath: string, sessionId: string): string {
+  return path.join(userDataPath, 'diagnostics', `perf-${sessionId}.jsonl`);
+}
+
+export function resolveDiagnosticsDirectory(userDataPath: string): string {
+  return path.join(userDataPath, 'diagnostics');
+}