[Glucy-2]

Problem

Tapping a recent-search entry in the search screen can crash the app:

java.lang.IllegalArgumentException: Key "history:net.ipv4.tcp_congestion_control" was already used. If you are using LazyColumn/Row please make sure you provide a unique key for each item.

Cause

SearchViewModel.handleSearch appends every query to the in-memory searchHistory list without checking for duplicates. The persisted history (AppPrefs.searchHistory) is a Set, so the duplicate only exists until the app restarts. After a term is searched while already present in the history (for example by tapping a recent search), the list holds two identical entries. SearchScreen uses "history:${it.hint}" as the LazyColumn item key, so the next time the hints are shown, Compose throws.

Fix

Remove an existing entry before adding the query (searchHistory.remove(query) in SearchViewModel.handleSearch), so the in-memory list stays unique like the persisted Set.

Testing

Built a debug APK from this branch and ran it on a device (Android 17, arm64): with one saved history item, opened search, tapped the search box, then tapped the recent search 3 times in a row. The app stayed alive and logcat showed no FATAL EXCEPTION. Before the change the first tap crashed with the exception above.