feat: scaffold electron orchestrator foundation

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/shared/pattern.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, test } from 'bun:test';
+
+import { createBuiltinPatterns, validatePatternDefinition } from '@shared/domain/pattern';
+
+describe('pattern validation', () => {
+  test('builtin patterns are valid except explicitly unavailable modes', () => {
+    const patterns = createBuiltinPatterns('2026-03-22T00:00:00.000Z');
+
+    const validPatterns = patterns.filter((pattern) => pattern.availability !== 'unavailable');
+
+    for (const pattern of validPatterns) {
+      expect(validatePatternDefinition(pattern)).toEqual([]);
+    }
+  });
+
+  test('magentic pattern is marked unavailable', () => {
+    const magentic = createBuiltinPatterns('2026-03-22T00:00:00.000Z').find(
+      (pattern) => pattern.mode === 'magentic',
+    );
+
+    expect(magentic).toBeDefined();
+    expect(validatePatternDefinition(magentic!)[0]?.message).toContain('unsupported');
+  });
+});