refactor(android): distill companion shell cleanup

apps/android/app/src/main/java/ai/openclaw/app/ui/ShellScreen.kt

@@ -793,10 +793,8 @@ private fun ChatShellScreen(
   ) {
     ChatScreen(
       viewModel = viewModel,
-      onBack = {},
       onVoice = onVoice,
       onOpenSessions = onOpenSessions,
-      showBackButton = false,
     )
   }
 }

apps/android/app/src/main/java/ai/openclaw/app/ui/chat/ChatScreen.kt

@@ -38,7 +38,6 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicTextField
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.automirrored.filled.Send
 import androidx.compose.material.icons.filled.AttachFile
 import androidx.compose.material.icons.filled.Close
@@ -80,10 +79,8 @@ import java.util.Locale
 @Composable
 fun ChatScreen(
   viewModel: MainViewModel,
-  onBack: () -> Unit,
   onVoice: () -> Unit,
-  onOpenSessions: (() -> Unit)? = null,
-  showBackButton: Boolean = true,
+  onOpenSessions: () -> Unit,
 ) {
   val messages by viewModel.chatMessages.collectAsState()
   val historyLoading by viewModel.chatHistoryLoading.collectAsState()
@@ -162,12 +159,10 @@ fun ChatScreen(
       thinkingLevel = thinkingLevel,
       healthOk = healthOk,
       pendingRunCount = pendingRunCount,
-      onBack = onBack,
       onMore = {
         viewModel.refreshChat()
         viewModel.refreshChatSessions(limit = 100)
       },
-      showBackButton = showBackButton,
     )
 
     ChatSessionSwitcher(
@@ -236,7 +231,7 @@ private fun ChatSessionSwitcher(
   sessions: List<ChatSessionEntry>,
   mainSessionKey: String,
   onSelectSession: (String) -> Unit,
-  onOpenSessions: (() -> Unit)?,
+  onOpenSessions: () -> Unit,
 ) {
   val choices =
     remember(sessionKey, sessions, mainSessionKey) {
@@ -260,7 +255,7 @@ private fun ChatSessionSwitcher(
         onClick = { onSelectSession(entry.key) },
       )
     }
-    if (onOpenSessions != null && sessions.size > choices.size) {
+    if (sessions.size > choices.size) {
       Surface(
         onClick = onOpenSessions,
         modifier = Modifier.heightIn(min = 36.dp),
@@ -312,20 +307,14 @@ private fun ChatHeader(
   thinkingLevel: String,
   healthOk: Boolean,
   pendingRunCount: Int,
-  onBack: () -> Unit,
   onMore: () -> Unit,
-  showBackButton: Boolean,
 ) {
   Row(
     modifier = Modifier.fillMaxWidth(),
     verticalAlignment = Alignment.CenterVertically,
     horizontalArrangement = Arrangement.spacedBy(6.dp),
   ) {
-    if (showBackButton) {
-      HeaderIcon(icon = Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Back", onClick = onBack)
-    } else {
-      Box(modifier = Modifier.size(ClawTheme.spacing.touchTarget))
-    }
+    Box(modifier = Modifier.size(ClawTheme.spacing.touchTarget))
 
     Column(
       modifier = Modifier.weight(1f),

apps/android/app/src/main/java/ai/openclaw/app/ui/chat/SessionFilters.kt

@@ -4,22 +4,9 @@ import ai.openclaw.app.chat.ChatSessionEntry
 
 private const val RECENT_WINDOW_MS = 24 * 60 * 60 * 1000L
 
-/**
- * Derive a human-friendly label from a raw session key.
- * Examples:
- *   "telegram:g-agent-main-main" -> "Main"
- *   "agent:main:main" -> "Main"
- *   "discord:g-server-channel" -> "Server Channel"
- *   "my-custom-session" -> "My Custom Session"
- */
 fun friendlySessionName(key: String): String {
-  // Strip common prefixes like "telegram:", "agent:", "discord:" etc.
   val stripped = key.substringAfterLast(":")
-
-  // Remove leading "g-" prefix (gateway artifact)
   val cleaned = if (stripped.startsWith("g-")) stripped.removePrefix("g-") else stripped
-
-  // Split on hyphens/underscores, title-case each word, collapse "main main" -> "Main"
   val words =
     cleaned
       .split('-', '_')
@@ -79,7 +66,6 @@ fun resolveSessionChoices(
   return result
 }
 
-/** Builds the compact top-of-chat session switcher without dropping main or the active session. */
 fun resolveCompactSessionChoices(
   currentSessionKey: String,
   sessions: List<ChatSessionEntry>,
@@ -94,24 +80,14 @@ fun resolveCompactSessionChoices(
       mainSessionKey = mainSessionKey,
       nowMs = nowMs,
     )
-  if (allChoices.size <= maxOptions) return allChoices
-
   val mainKey = mainSessionKey.trim().ifEmpty { "main" }
   val current = currentSessionKey.trim().let { if (it == "main" && mainKey != "main") mainKey else it }
-  val pinnedKeys = listOf(mainKey, current).filter { it.isNotBlank() }
-  val result = mutableListOf<ChatSessionEntry>()
-  val seen = mutableSetOf<String>()
+  val pinnedRank = listOf(mainKey, current).filter { it.isNotBlank() }.distinct().withIndex().associate { it.value to it.index }
+  val unpinnedRank = pinnedRank.size
 
-  pinnedKeys.forEach { key ->
-    allChoices.firstOrNull { it.key == key }?.let { entry ->
-      if (seen.add(entry.key)) result.add(entry)
-    }
-  }
-
-  allChoices.forEach { entry ->
-    if (result.size >= maxOptions) return@forEach
-    if (seen.add(entry.key)) result.add(entry)
-  }
-
-  return result
+  return allChoices
+    .withIndex()
+    .sortedWith(compareBy({ pinnedRank[it.value.key] ?: unpinnedRank }, { it.index }))
+    .take(maxOptions)
+    .map { it.value }
 }