feat: advance browser agent integration workflows

src/features/browser-recording/budget.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it } from 'vitest';
+import type { BrowserRecordingEvent } from '@/types/models';
+import {
+  boundRecordingPreviews,
+  recordingEventPreviewBytes,
+  recordingSerializedBytes,
+} from './budget';
+
+function event(id: string, preview: string): BrowserRecordingEvent {
+  return {
+    id,
+    sequence: Number(id),
+    timestamp: Number(id),
+    recordingId: 'recording-1',
+    traceId: 'trace-1',
+    kind: 'crypto',
+    operation: 'encrypt',
+    inputs: [{ path: '$input', fingerprint: id, encoding: 'text', byteLength: preview.length, preview }],
+    outputs: [],
+    sensitiveCaptured: true,
+    inputPreview: preview,
+  };
+}
+
+describe('browser recording budgets', () => {
+  it('drops oldest previews without removing event metadata or fingerprints', () => {
+    const bounded = boundRecordingPreviews([
+      event('1', 'a'.repeat(128)),
+      event('2', 'b'.repeat(128)),
+    ], 300);
+
+    expect(bounded.events).toHaveLength(2);
+    expect(bounded.events[0]).toMatchObject({ id: '1', sensitiveCaptured: false });
+    expect(bounded.events[0].inputPreview).toBeUndefined();
+    expect(bounded.events[0].inputs[0]).toMatchObject({ fingerprint: '1' });
+    expect(bounded.events[1].inputPreview).toHaveLength(128);
+    expect(bounded.retainedBytes).toBeLessThanOrEqual(300);
+    expect(bounded.droppedCount).toBe(2);
+  });
+
+  it('counts UTF-8 bytes instead of JavaScript code units', () => {
+    const value = event('1', '密钥');
+    expect(recordingEventPreviewBytes(value)).toBe(12);
+    expect(recordingSerializedBytes({ value: '密钥' })).toBeGreaterThan('{"value":""}'.length);
+  });
+
+  it('reports unserializable data as over budget', () => {
+    const cyclic: Record<string, unknown> = {};
+    cyclic.self = cyclic;
+    expect(recordingSerializedBytes(cyclic)).toBe(Number.MAX_SAFE_INTEGER);
+  });
+});