feat: implement stability fixes and enhance error handling

vitest.config.mjs

@@ -0,0 +1,18 @@
+import { defineConfig } from 'vitest/config';
+import path from 'path';
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      '@': path.resolve(process.cwd(), './src'),
+      // Mock native modules that fail to load in test environment
+      keytar: path.resolve(process.cwd(), './src/mocks/empty.ts'),
+      'better-sqlite3': path.resolve(process.cwd(), './src/mocks/empty.ts'),
+    },
+  },
+  test: {
+    globals: true,
+    environment: 'happy-dom',
+    include: ['src/tests/unit/**/*.test.ts'],
+  },
+});