Run lint only on PRs, not on main (#1)

* Skip lint on main pushes, keep it on PRs

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Mock react-native-encrypted-storage in Jest

Native module isn't registered in the Jest environment, so importing
EncryptedStorage threw "RNEncryptedStorage is undefined" and broke the
App test suite.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dfalling

.github/workflows/ci.yml

@@ -26,6 +26,7 @@ jobs:
         run: bunx tsc --noEmit
 
       - name: Biome (lint + format check)
+        if: github.event_name == 'pull_request'
         run: bun run lint
 
       - name: Test

jest.config.js

@@ -1,3 +1,4 @@
 module.exports = {
   preset: '@react-native/jest-preset',
+  setupFiles: ['<rootDir>/jest.setup.js'],
 };

jest.setup.js

@@ -0,0 +1,9 @@
+jest.mock('react-native-encrypted-storage', () => ({
+  __esModule: true,
+  default: {
+    setItem: jest.fn(() => Promise.resolve()),
+    getItem: jest.fn(() => Promise.resolve(null)),
+    removeItem: jest.fn(() => Promise.resolve()),
+    clear: jest.fn(() => Promise.resolve()),
+  },
+}));