refactor(main): split main.ts into focused runtime modules (#123)

src/main/runtime/update/update-service-runtime.test.ts

@@ -0,0 +1,43 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { runSupportAssetUpdatesForLauncherResult } from './update-support-assets-runtime';
+
+test('runSupportAssetUpdatesForLauncherResult logs support-asset errors and preserves launcher result', async () => {
+  const warnings: string[] = [];
+  const launcherResult = { status: 'updated' } as const;
+  const result = await runSupportAssetUpdatesForLauncherResult({
+    launcherResult,
+    updateSupportAssets: async () => {
+      throw new Error('archive failed');
+    },
+    logWarn: (message, details) => {
+      warnings.push(`${message}:${details instanceof Error ? details.message : String(details)}`);
+    },
+  });
+
+  assert.equal(result, launcherResult);
+  assert.deepEqual(warnings, ['Support asset update failed after launcher update:archive failed']);
+});
+
+test('runSupportAssetUpdatesForLauncherResult uses support asset description in skip warnings', async () => {
+  const warnings: string[] = [];
+  const launcherResult = { status: 'updated' } as const;
+
+  const result = await runSupportAssetUpdatesForLauncherResult({
+    launcherResult,
+    assetDescription: 'Support asset update',
+    updateSupportAssets: async () => [
+      { status: 'protected', command: 'install-theme' },
+      { status: 'hash-mismatch', message: 'checksum failed' },
+    ],
+    logWarn: (message) => {
+      warnings.push(message);
+    },
+  });
+
+  assert.equal(result, launcherResult);
+  assert.deepEqual(warnings, [
+    'Support asset update requires manual command: install-theme',
+    'Support asset update skipped: checksum failed',
+  ]);
+});