fix: auto codec, force-ping button, relay delete button

1. Auto codec: new "Auto" position on quality slider (JNI index 7).
   When selected, the engine uses the relay's chosen_profile from
   CallAnswer instead of the local preference. Slider now has 8
   positions: Studio 64k → Auto → Codec2 1.2k.

2. Force ping: added refresh button (↻) in Manage Relays dialog
   header. Calls pingAllServers() to re-check all relays on demand.

3. Delete relay fix: the X button was inside a Surface(onClick=...)
   which swallowed the touch event. Replaced with a separate Surface
   that properly intercepts the click.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

android/app/src/main/java/com/wzp/ui/call/InCallScreen.kt

@@ -485,6 +485,7 @@ fun InCallScreen(
             onSelect = { idx -> viewModel.selectServer(idx) },
             onDelete = { idx -> viewModel.removeServer(idx) },
             onAdd = { addr, label -> viewModel.addServer(addr, label) },
+            onRefresh = { viewModel.pingAllServers() },
             onDismiss = { showManageRelays = false }
         )
     }
@@ -513,6 +514,7 @@ private fun ManageRelaysDialog(
     onSelect: (Int) -> Unit,
     onDelete: (Int) -> Unit,
     onAdd: (String, String) -> Unit,
+    onRefresh: () -> Unit,
     onDismiss: () -> Unit
 ) {
     var addName by remember { mutableStateOf("") }
@@ -528,6 +530,17 @@ private fun ManageRelaysDialog(
                 verticalAlignment = Alignment.CenterVertically
             ) {
                 Text("Manage Relays", color = Color.White, fontWeight = FontWeight.Bold)
+                Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                    Surface(
+                        onClick = onRefresh,
+                        shape = RoundedCornerShape(8.dp),
+                        color = DarkSurface2,
+                        modifier = Modifier.size(32.dp)
+                    ) {
+                        Box(contentAlignment = Alignment.Center) {
+                            Text("\u21BB", color = TextDim, fontSize = 16.sp)
+                        }
+                    }
                     Surface(
                         onClick = onDismiss,
                         shape = RoundedCornerShape(8.dp),
@@ -539,6 +552,7 @@ private fun ManageRelaysDialog(
                         }
                     }
                 }
+            }
         },
         text = {
             Column {
@@ -590,13 +604,17 @@ private fun ManageRelaysDialog(
                                     )
                                 }
                             }
-                            Spacer(modifier = Modifier.width(8.dp))
+                            Spacer(modifier = Modifier.width(4.dp))
-                            Text(
+                            Surface(
-                                "\u00D7",
+                                onClick = { onDelete(idx) },
-                                color = TextDim,
+                                shape = RoundedCornerShape(4.dp),
-                                fontSize = 18.sp,
+                                color = Color.Transparent,
-                                modifier = Modifier.clickable { onDelete(idx) }
+                                modifier = Modifier.size(32.dp)
-                            )
+                            ) {
+                                Box(contentAlignment = Alignment.Center) {
+                                    Text("\u00D7", color = TextDim, fontSize = 18.sp)
+                                }
+                            }
                         }
                     }
                 }

android/app/src/main/java/com/wzp/ui/settings/SettingsScreen.kt

@@ -245,19 +245,19 @@ fun SettingsScreen(
 
             Spacer(modifier = Modifier.height(12.dp))
 
-            // Quality selection — slider from best (studio 64k) to worst (codec2 1.2k)
+            // Quality selection — slider from best (studio 64k) to worst (codec2 1.2k) + auto
             val qualityLabels = listOf(
-                "Studio 64k", "Studio 48k", "Studio 32k", "Opus 24k",
+                "Studio 64k", "Studio 48k", "Studio 32k", "Auto",
-                "Opus 6k", "Codec2 1.2k", "Codec2 3.2k"
+                "Opus 24k", "Opus 6k", "Codec2 3.2k", "Codec2 1.2k"
             )
             // Map slider position to JNI profile int:
-            // 0=Studio64k(6), 1=Studio48k(5), 2=Studio32k(4), 3=Opus24k(0),
+            // 0=Studio64k(6), 1=Studio48k(5), 2=Studio32k(4), 3=Auto(7),
-            // 4=Opus6k(1), 5=Codec2_1.2k(2), 6=Codec2_3.2k(3)
+            // 4=Opus24k(0), 5=Opus6k(1), 6=Codec2_3.2k(3), 7=Codec2_1.2k(2)
-            val sliderToProfile = intArrayOf(6, 5, 4, 0, 1, 2, 3)
+            val sliderToProfile = intArrayOf(6, 5, 4, 7, 0, 1, 3, 2)
-            val profileToSlider = mapOf(6 to 0, 5 to 1, 4 to 2, 0 to 3, 1 to 4, 2 to 5, 3 to 6)
+            val profileToSlider = mapOf(6 to 0, 5 to 1, 4 to 2, 7 to 3, 0 to 4, 1 to 5, 3 to 6, 2 to 7)
             val qualityColors = listOf(
                 Color(0xFF22C55E), Color(0xFF4ADE80), Color(0xFF86EFAC), Color(0xFFA3E635),
-                Color(0xFFFACC15), Color(0xFF991B1B), Color(0xFFE97320)
+                Color(0xFFA3E635), Color(0xFFFACC15), Color(0xFFE97320), Color(0xFF991B1B)
             )
             val currentCodec by viewModel.codecChoice.collectAsState()
             val sliderPos = profileToSlider[currentCodec] ?: 3
@@ -276,8 +276,8 @@ fun SettingsScreen(
             Slider(
                 value = sliderPos.toFloat(),
                 onValueChange = { viewModel.setCodecChoice(sliderToProfile[it.toInt()]) },
-                valueRange = 0f..6f,
+                valueRange = 0f..7f,
-                steps = 5,
+                steps = 6,
                 modifier = Modifier.fillMaxWidth()
             )
             Row(

crates/wzp-android/src/engine.rs

@@ -38,6 +38,8 @@ fn frame_samples_for(profile: &QualityProfile) -> usize {
 /// Configuration to start a call.
 pub struct CallStartConfig {
     pub profile: QualityProfile,
+    /// When true, use the relay's chosen_profile from CallAnswer instead of local profile.
+    pub auto_profile: bool,
     pub relay_addr: String,
     pub room: String,
     pub auth_token: Vec<u8>,
@@ -49,6 +51,7 @@ impl Default for CallStartConfig {
     fn default() -> Self {
         Self {
             profile: QualityProfile::GOOD,
+            auto_profile: false,
             relay_addr: String::new(),
             room: String::new(),
             auth_token: Vec::new(),
@@ -126,6 +129,7 @@ impl WzpEngine {
         let room = config.room.clone();
         let identity_seed = config.identity_seed;
         let profile = config.profile;
+        let auto_profile = config.auto_profile;
         let alias = config.alias.clone();
         let state = self.state.clone();
 
@@ -134,7 +138,7 @@ impl WzpEngine {
 
         let state_clone = state.clone();
         runtime.block_on(async move {
-            if let Err(e) = run_call(relay_addr, &room, &identity_seed, profile, alias.as_deref(), state_clone).await
+            if let Err(e) = run_call(relay_addr, &room, &identity_seed, profile, auto_profile, alias.as_deref(), state_clone).await
             {
                 error!("call failed: {e}");
             }
@@ -277,6 +281,7 @@ async fn run_call(
     room: &str,
     identity_seed: &[u8; 32],
     profile: QualityProfile,
+    auto_profile: bool,
     alias: Option<&str>,
     state: Arc<EngineState>,
 ) -> Result<(), anyhow::Error> {
@@ -328,8 +333,8 @@ async fn run_call(
         .await?
         .ok_or_else(|| anyhow::anyhow!("connection closed before CallAnswer"))?;
 
-    let relay_ephemeral_pub = match answer {
+    let (relay_ephemeral_pub, chosen_profile) = match answer {
-        SignalMessage::CallAnswer { ephemeral_pub, .. } => ephemeral_pub,
+        SignalMessage::CallAnswer { ephemeral_pub, chosen_profile, .. } => (ephemeral_pub, chosen_profile),
         other => {
             return Err(anyhow::anyhow!(
                 "expected CallAnswer, got {:?}",
@@ -338,8 +343,16 @@ async fn run_call(
         }
     };
 
+    // Auto mode: use the relay's chosen profile instead of the local preference
+    let profile = if auto_profile {
+        info!(chosen = ?chosen_profile.codec, "auto mode: using relay's chosen profile");
+        chosen_profile
+    } else {
+        profile
+    };
+
     let _session = kx.derive_session(&relay_ephemeral_pub)?;
-    info!("handshake complete, call active");
+    info!(codec = ?profile.codec, "handshake complete, call active");
 
     {
         let mut stats = state.stats.lock().unwrap();

crates/wzp-android/src/jni_bridge.rs

@@ -21,6 +21,9 @@ unsafe fn handle_ref(handle: jlong) -> &'static mut EngineHandle {
     unsafe { &mut *(handle as *mut EngineHandle) }
 }
 
+/// 7 = auto (use relay's chosen profile)
+const PROFILE_AUTO: jint = 7;
+
 fn profile_from_int(value: jint) -> QualityProfile {
     match value {
         0 => QualityProfile::GOOD,            // Opus 24k
@@ -35,7 +38,7 @@ fn profile_from_int(value: jint) -> QualityProfile {
         4 => QualityProfile::STUDIO_32K,      // Opus 32k
         5 => QualityProfile::STUDIO_48K,      // Opus 48k
         6 => QualityProfile::STUDIO_64K,      // Opus 64k
-        _ => QualityProfile::GOOD,
+        _ => QualityProfile::GOOD,            // auto falls back to GOOD
     }
 }
 
@@ -122,6 +125,7 @@ pub unsafe extern "system" fn Java_com_wzp_engine_WzpEngine_nativeStartCall(
 
         let config = CallStartConfig {
             profile: profile_from_int(profile_j),
+            auto_profile: profile_j == PROFILE_AUTO,
             relay_addr,
             room,
             auth_token: if token.is_empty() { Vec::new() } else { token.into_bytes() },