## Summary
- Removed all `setupEncryptionKey()` / `visitWithEncryptionKey()` calls
from browser tests — encryption key setup in localStorage is no longer
needed since new users don't have encryption
- Removed `encryption_salt` from `UserFactory::onboarded()` state and
`OnboardingFlowTest` user creation
- Removed `name_iv` from `Account::factory()` calls in
`BankAccountsTest`
- Deleted `DemoEncryptionService` and its unit test — demo command now
stores plaintext account names and transaction descriptions
- Removed `demoEncryptionKey` Inertia shared prop and `encryption_key`
from demo config
- Removed encryption helper methods from `TestCase.php` and global
`setupEncryptionKey()` from `Pest.php`
## Test plan
- [x] Run `php artisan test --exclude-testsuite=Browser` — all
non-browser tests pass
- [x] Run `php artisan test --testsuite=Browser` — browser tests pass
without encryption key setup
- [x] Run `php artisan demo:reset` — demo account created with plaintext
data
- [x] Verify existing encryption migration tests still pass
(`EncryptionTest`, `DecryptTransactionsTest`,
`PlaintextTransactionsTest`)
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