Test 1: Write new file (non-destructive)

Writes h1_triage_poc.txt into the app's shared_prefs/ directory. Verify with adb.

Tap to trigger traversal

Test 2: Destroy preferences (visible without adb)

Destructive. This kills biometric login and resets all settings. Use a test device.
  1. Open the Avanza app, log in with BankID, enable biometric login
  2. Come back here and tap the button below
  3. Force-close the app (swipe away from recents)
  4. Reopen the app - biometric login is gone, settings are reset
Tap to overwrite encrypted preferences

Test 3: Destroy database (visible without adb)

Destructive. Corrupts the local database. Watchlists gone, possible crash.
  1. Create or modify a watchlist in the app
  2. Come back here and tap the button below
  3. Force-close and reopen - watchlists gone or app crashes
Tap to overwrite database