fix(desktop): remove noisy debug logs and silence SLF4J warnings

Remove feedSub/contactList debug prints from FeedScreen, suppress
GiftWrapEvent decryption failure log (expected for others' wraps),
and add slf4j-nop to silence "No SLF4J providers" console warnings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktopApp/build.gradle.kts

@@ -49,6 +49,9 @@ dependencies {
     // Collections
     implementation(libs.kotlinx.collections.immutable)
 
+    // SLF4J no-op — silence "No SLF4J providers" warnings from transitive deps
+    implementation("org.slf4j:slf4j-nop:2.0.16")
+
     // QR code generation (ZXing core)
     implementation(libs.zxing)
 

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/FeedScreen.kt

@@ -58,7 +58,6 @@ import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.commons.state.EventCollectionState
 import com.vitorpamplona.amethyst.commons.ui.components.EmptyState
 import com.vitorpamplona.amethyst.commons.ui.components.LoadingState
-import com.vitorpamplona.amethyst.desktop.DebugConfig
 import com.vitorpamplona.amethyst.desktop.DesktopPreferences
 import com.vitorpamplona.amethyst.desktop.account.AccountState
 import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
@@ -208,7 +207,6 @@ fun FeedScreen(
                 onEvent = { event, _, relay, _ ->
                     if (event is ContactListEvent) {
                         val follows = event.verifiedFollowKeySet()
-                        DebugConfig.log("contactList: ${follows.size} follows from $relay")
                         followedUsers = follows
                     }
                 },
@@ -260,7 +258,6 @@ fun FeedScreen(
 
     // Subscribe to feed based on mode
     rememberSubscription(configuredRelays, feedMode, followedUsers, relayManager = relayManager) {
-        DebugConfig.log("feedSub: mode=$feedMode, relays=${configuredRelays.size}, followedUsers=${followedUsers.size}")
         if (configuredRelays.isEmpty()) {
             return@rememberSubscription null
         }