Flutter Android login vault: local DB (id+base64 content), email/Google auth, dashboard search/edit/swipe-delete, dark/system theme, minSdk 29

lib/constants.dart

@@ -0,0 +1,19 @@
+/// App-wide constants.
+///
+/// SECURITY NOTE: The "encryption" below is a lightweight obfuscation
+/// (XOR + base64) keyed by a constant. It is NOT cryptographically secure
+/// and exists only to satisfy the requirement "content disimpan dengan
+/// encrypt base64 (key sebagai constant)". For real protection, swap
+/// [encryptionKey] for a key derived from the user's app password + a
+/// platform secure store (e.g. flutter_secure_storage + AES).
+class AppConstants {
+  /// Constant encryption key used for the XOR+base64 obfuscation.
+  static const String encryptionKey = 'OMAH_CITRA_LOGIN_VAULT_2026_XOR_KEY';
+
+  /// SQLite database file name.
+  static const String dbName = 'login_vault.db';
+
+  /// Application package-ish identifiers for secure storage keys.
+  static const String secureKeyEmail = 'vault_email';
+  static const String secureKeyAppPassword = 'vault_app_password';
+}