feat(core): add Electron runtime, services, and app composition

src/main/runtime/initial-args-runtime-handler.test.ts

@@ -0,0 +1,24 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { createInitialArgsRuntimeHandler } from './initial-args-runtime-handler';
+
+test('initial args runtime handler composes main deps and runs initial command flow', () => {
+  const calls: string[] = [];
+  const handleInitialArgs = createInitialArgsRuntimeHandler({
+    getInitialArgs: () => ({ start: true } as never),
+    isBackgroundMode: () => true,
+    ensureTray: () => calls.push('tray'),
+    isTexthookerOnlyMode: () => false,
+    hasImmersionTracker: () => true,
+    getMpvClient: () => ({
+      connected: false,
+      connect: () => calls.push('connect'),
+    }),
+    logInfo: (message) => calls.push(`log:${message}`),
+    handleCliCommand: (_args, source) => calls.push(`cli:${source}`),
+  });
+
+  handleInitialArgs();
+
+  assert.deepEqual(calls, ['tray', 'log:Auto-connecting MPV client for immersion tracking', 'connect', 'cli:initial']);
+});