feat: improve stats dashboard and annotation settings

stats/src/lib/api-client.test.ts

@@ -0,0 +1,67 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { apiClient, BASE_URL, resolveStatsBaseUrl } from './api-client';
+
+test('resolveStatsBaseUrl prefers apiBase query parameter for file-based overlay mode', () => {
+  const baseUrl = resolveStatsBaseUrl({
+    protocol: 'file:',
+    origin: 'null',
+    search: '?overlay=1&apiBase=http%3A%2F%2F127.0.0.1%3A6123',
+  });
+
+  assert.equal(baseUrl, 'http://127.0.0.1:6123');
+});
+
+test('resolveStatsBaseUrl falls back to configured window origin for browser mode', () => {
+  const baseUrl = resolveStatsBaseUrl({
+    protocol: 'http:',
+    origin: 'http://127.0.0.1:6123',
+    search: '',
+  });
+
+  assert.equal(baseUrl, 'http://127.0.0.1:6123');
+});
+
+test('resolveStatsBaseUrl keeps legacy localhost fallback for file mode without apiBase', () => {
+  const baseUrl = resolveStatsBaseUrl({
+    protocol: 'file:',
+    origin: 'null',
+    search: '?overlay=1',
+  });
+
+  assert.equal(baseUrl, 'http://127.0.0.1:6969');
+});
+
+test('deleteSession sends a DELETE request to the session endpoint', async () => {
+  const originalFetch = globalThis.fetch;
+  let seenUrl = '';
+  let seenMethod = '';
+  globalThis.fetch = (async (input: RequestInfo | URL, init?: RequestInit) => {
+    seenUrl = String(input);
+    seenMethod = init?.method ?? 'GET';
+    return new Response(null, { status: 200 });
+  }) as typeof globalThis.fetch;
+
+  try {
+    await apiClient.deleteSession(42);
+    assert.equal(seenUrl, `${BASE_URL}/api/stats/sessions/42`);
+    assert.equal(seenMethod, 'DELETE');
+  } finally {
+    globalThis.fetch = originalFetch;
+  }
+});
+
+test('deleteSession throws when the stats API delete request fails', async () => {
+  const originalFetch = globalThis.fetch;
+  globalThis.fetch = (async () =>
+    new Response('boom', {
+      status: 500,
+      statusText: 'Internal Server Error',
+    })) as typeof globalThis.fetch;
+
+  try {
+    await assert.rejects(() => apiClient.deleteSession(7), /Stats API error: 500 boom/);
+  } finally {
+    globalThis.fetch = originalFetch;
+  }
+});