auto unlock on correct pin

app/src/main/java/sh/sar/basedbank/ui/home/SettingsSecurityFragment.kt

@@ -31,6 +31,15 @@ class SettingsSecurityFragment : Fragment() {
             )
         }
 
+        // Auto unlock on correct PIN (only for pin method)
+        if (prefs.getString("security_method", null) == "pin") {
+            binding.rowAutoUnlockPin.visibility = View.VISIBLE
+            binding.switchAutoUnlockPin.isChecked = prefs.getBoolean("auto_unlock_pin", false)
+            binding.switchAutoUnlockPin.setOnCheckedChangeListener { _, isChecked ->
+                prefs.edit().putBoolean("auto_unlock_pin", isChecked).apply()
+            }
+        }
+
         // Biometrics
         val canUseBiometrics = BiometricManager.from(requireContext())
             .canAuthenticate(BiometricManager.Authenticators.BIOMETRIC_WEAK) == BiometricManager.BIOMETRIC_SUCCESS

app/src/main/java/sh/sar/basedbank/ui/onboarding/SecuritySetupFragment.kt

@@ -215,9 +215,10 @@ class SecuritySetupFragment : Fragment() {
         val salt = ByteArray(16).also { SecureRandom().nextBytes(it) }
         val saltB64 = Base64.encodeToString(salt, Base64.NO_WRAP)
         val hash = pbkdf2(input, salt)
-        requireContext().getSharedPreferences("prefs", Context.MODE_PRIVATE).edit()
+        val edit = requireContext().getSharedPreferences("prefs", Context.MODE_PRIVATE).edit()
             .putString("security_method", method)
-            .apply()
+        if (method == "pin") edit.putInt("pin_length", input.length)
+        edit.apply()
         CredentialStore(requireContext()).saveSecurityHash(saltB64, hash)
     }