Add Prettier and ESLint config, update dependencies

Added .prettierrc.js and eslint.config.mts for code formatting and linting. Upgraded Yarn to 4.10.3 and updated .yarnrc.yml and package.json. Made code and dependency updates in android, example, and src files to align with new tooling.

Author: mCodex

.prettierrc.js

@@ -0,0 +1,5 @@
+module.exports = {
+  singleQuote: true,
+  trailingComma: 'all',
+  printWidth: 100,
+};

.yarn/releases/yarn-4.10.3.cjs

@@ -1 +1,7 @@
+compressionLevel: mixed
+
+enableGlobalCache: false
+
 nodeLinker: node-modules
+
+yarnPath: .yarn/releases/yarn-4.10.3.cjs

.yarnrc.yml

@@ -76,8 +76,10 @@ internal data class PersistedEntry(
         return null
       }
 
-      val ciphertext = json.optString(KEY_CIPHERTEXT, null)?.let { Base64.decode(it, Base64.NO_WRAP) }
-      val iv = json.optString(KEY_IV, null)?.let { Base64.decode(it, Base64.NO_WRAP) }
+  val ciphertextEncoded = json.optString(KEY_CIPHERTEXT, "")
+  val ciphertext = ciphertextEncoded.takeIf { it.isNotEmpty() }?.let { Base64.decode(it, Base64.NO_WRAP) }
+  val ivEncoded = json.optString(KEY_IV, "")
+  val iv = ivEncoded.takeIf { it.isNotEmpty() }?.let { Base64.decode(it, Base64.NO_WRAP) }
       val authenticators = json.optInt(KEY_AUTHENTICATORS, 0)
       val requiresAuth = json.optBoolean(KEY_REQUIRES_AUTH, false)
       val invalidateOnEnrollment = json.optBoolean(KEY_INVALIDATE_ON_ENROLLMENT, false)

android/src/main/java/com/sensitiveinfo/internal/storage/PersistedEntry.kt

@@ -0,0 +1,70 @@
+ 
+
+import { fixupPluginRules } from '@eslint/compat';
+import { FlatCompat } from '@eslint/eslintrc';
+import js from '@eslint/js';
+import typescriptEslint from '@typescript-eslint/eslint-plugin';
+import tsParser from '@typescript-eslint/parser';
+import importHelpers from 'eslint-plugin-import-helpers';
+import prettier from 'eslint-plugin-prettier';
+import react from 'eslint-plugin-react';
+import reactHooks from 'eslint-plugin-react-hooks';
+import globals from 'globals';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+});
+
+export default [
+  ...compat.extends(
+    'plugin:react/recommended',
+    'airbnb',
+    'plugin:@typescript-eslint/recommended',
+    'prettier',
+  ),
+  {
+    plugins: {
+      react,
+      'react-hooks': fixupPluginRules(reactHooks),
+      '@typescript-eslint': typescriptEslint,
+      prettier,
+      'import-helpers': importHelpers,
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+        __DEV__: 'readonly',
+        console: 'readonly',
+      },
+
+      parser: tsParser,
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+
+      parserOptions: {
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+    },
+
+    settings: {
+      'import/resolver': {
+        typescript: {},
+      },
+    },
+
+    rules: {
+      'prettier/prettier': 'error',
+    },
+  },
+];