feat(activity): add contribution ledger

tests/app-activity-usage.test.mjs

@@ -0,0 +1,55 @@
+import { test, mock } from 'node:test';
+import assert from 'node:assert/strict';
+import { execFileSync } from 'node:child_process';
+import { readFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+
+const preloadUrl = new URL('../app/src/preload/index.ts', import.meta.url);
+const preloadDir = fileURLToPath(new URL('.', preloadUrl));
+
+function esmResolve(specifier) {
+  return execFileSync(
+    process.execPath,
+    ['--input-type=module', '-e', `process.stdout.write(import.meta.resolve(${JSON.stringify(specifier)}))`],
+    { cwd: preloadDir, encoding: 'utf8' },
+  ).trim();
+}
+
+test('Activity requests usage across all indexed providers', () => {
+  const source = readFileSync(new URL('../app/src/renderer/src/views/Activity.vue', import.meta.url), 'utf8');
+  assert.match(source, /getUsageStats\(\{\s*source:\s*['"]all['"]\s*\}\)/);
+  assert.match(source, /onIndexUpdated\?\.\(\(\)\s*=>\s*\{?\s*(?:void\s+)?loadUsageStats\(\)/s);
+  assert.match(source, /Array\.from\(\{\s*length:\s*loadedMonths\.value\s*\}/);
+  assert.doesNotMatch(source, /monthBlocks\s*=\s*ref\(/);
+});
+
+test('preload forwards usage source options to the main process', async () => {
+  const calls = [];
+  let api;
+  const electron = mock.module(esmResolve('electron'), {
+    namedExports: {
+      contextBridge: {
+        exposeInMainWorld(_name, exposedApi) {
+          api = exposedApi;
+        },
+      },
+      ipcRenderer: {
+        invoke(...args) {
+          calls.push(args);
+          return Promise.resolve(null);
+        },
+        on() {},
+        removeListener() {},
+      },
+    },
+  });
+
+  try {
+    await import(`${preloadUrl.href}?activity-usage=${Date.now()}`);
+    await api.getUsageStats({ source: 'all' });
+    assert.deepEqual(calls.at(-1), ['db:getUsageStats', { source: 'all' }]);
+  } finally {
+    electron.restore();
+    mock.reset();
+  }
+});