refactor: split main runtime wrappers into focused modules

src/main/runtime/tray-runtime.test.ts

@@ -0,0 +1,45 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { buildTrayMenuTemplateRuntime, resolveTrayIconPathRuntime } from './tray-runtime';
+
+test('resolve tray icon picks template icon first on darwin', () => {
+  const path = resolveTrayIconPathRuntime({
+    platform: 'darwin',
+    resourcesPath: '/res',
+    appPath: '/app',
+    dirname: '/dist/main',
+    joinPath: (...parts) => parts.join('/'),
+    fileExists: (candidate) => candidate.endsWith('/res/assets/SubMinerTemplate.png'),
+  });
+  assert.equal(path, '/res/assets/SubMinerTemplate.png');
+});
+
+test('resolve tray icon returns null when no asset exists', () => {
+  const path = resolveTrayIconPathRuntime({
+    platform: 'linux',
+    resourcesPath: '/res',
+    appPath: '/app',
+    dirname: '/dist/main',
+    joinPath: (...parts) => parts.join('/'),
+    fileExists: () => false,
+  });
+  assert.equal(path, null);
+});
+
+test('tray menu template contains expected entries and handlers', () => {
+  const calls: string[] = [];
+  const template = buildTrayMenuTemplateRuntime({
+    openOverlay: () => calls.push('overlay'),
+    openYomitanSettings: () => calls.push('yomitan'),
+    openRuntimeOptions: () => calls.push('runtime'),
+    openJellyfinSetup: () => calls.push('jellyfin'),
+    openAnilistSetup: () => calls.push('anilist'),
+    quitApp: () => calls.push('quit'),
+  });
+
+  assert.equal(template.length, 7);
+  template[0].click?.();
+  template[5].type === 'separator' ? calls.push('separator') : calls.push('bad');
+  template[6].click?.();
+  assert.deepEqual(calls, ['overlay', 'separator', 'quit']);
+});