fix: local execute for yarn v1 and 2+ compatibility (npmx-dev#544)

Author: vinnymac

app/utils/install-command.ts

@@ -25,7 +25,9 @@ export const packageManagers = [
     id: 'yarn',
     label: 'yarn',
     action: 'add',
-    executeLocal: 'yarn',
+    // For both yarn v1 and v2+ support
+    // local exec defers to npx instead
+    executeLocal: 'npx',
     executeRemote: 'yarn dlx',
     create: 'yarn create',
     icon: 'i-simple-icons:yarn',

test/unit/app/utils/install-command.spec.ts

@@ -292,7 +292,7 @@ describe('install command generation', () => {
       it.each([
         ['npm', ['npx', 'eslint']],
         ['pnpm', ['pnpm', 'exec', 'eslint']],
-        ['yarn', ['yarn', 'eslint']],
+        ['yarn', ['npx', 'eslint']],
         ['bun', ['bunx', 'eslint']],
         ['deno', ['deno', 'run', 'npm:eslint']],
         ['vlt', ['vlt', 'x', 'eslint']],

test/unit/app/utils/run-command.spec.ts

@@ -81,7 +81,7 @@ describe('executable detection and run commands', () => {
     it.each([
       ['npm', ['npx', 'eslint']],
       ['pnpm', ['pnpm', 'exec', 'eslint']],
-      ['yarn', ['yarn', 'eslint']],
+      ['yarn', ['npx', 'eslint']],
       ['bun', ['bunx', 'eslint']],
       ['deno', ['deno', 'run', 'npm:eslint']],
       ['vlt', ['vlt', 'x', 'eslint']],