feat: add recent session switchers

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/chat/ChatComposer.kt

@@ -15,7 +15,6 @@ import androidx.compose.foundation.horizontalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowUpward
 import androidx.compose.material.icons.filled.AttachFile
-import androidx.compose.material.icons.filled.FolderOpen
 import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material.icons.filled.Stop
 import androidx.compose.material3.ButtonDefaults
@@ -39,10 +38,12 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
+import com.steipete.clawdis.node.chat.ChatSessionEntry
 
 @Composable
 fun ChatComposer(
   sessionKey: String,
+  sessions: List<ChatSessionEntry>,
   healthOk: Boolean,
   thinkingLevel: String,
   pendingRunCount: Int,
@@ -51,13 +52,16 @@ fun ChatComposer(
   onPickImages: () -> Unit,
   onRemoveAttachment: (id: String) -> Unit,
   onSetThinkingLevel: (level: String) -> Unit,
-  onShowSessions: () -> Unit,
+  onSelectSession: (sessionKey: String) -> Unit,
   onRefresh: () -> Unit,
   onAbort: () -> Unit,
   onSend: (text: String) -> Unit,
 ) {
   var input by rememberSaveable { mutableStateOf("") }
   var showThinkingMenu by remember { mutableStateOf(false) }
+  var showSessionMenu by remember { mutableStateOf(false) }
+
+  val sessionOptions = resolveSessionChoices(sessionKey, sessions)
 
   val canSend = pendingRunCount == 0 && (input.trim().isNotEmpty() || attachments.isNotEmpty()) && healthOk
 
@@ -73,6 +77,34 @@ fun ChatComposer(
         horizontalArrangement = Arrangement.spacedBy(8.dp),
         verticalAlignment = Alignment.CenterVertically,
       ) {
+        Box {
+          FilledTonalButton(
+            onClick = { showSessionMenu = true },
+            contentPadding = ButtonDefaults.ContentPadding,
+          ) {
+            Text("Session: $sessionKey")
+          }
+
+          DropdownMenu(expanded = showSessionMenu, onDismissRequest = { showSessionMenu = false }) {
+            for (entry in sessionOptions) {
+              DropdownMenuItem(
+                text = { Text(entry.key) },
+                onClick = {
+                  onSelectSession(entry.key)
+                  showSessionMenu = false
+                },
+                trailingIcon = {
+                  if (entry.key == sessionKey) {
+                    Text("✓")
+                  } else {
+                    Spacer(modifier = Modifier.width(10.dp))
+                  }
+                },
+              )
+            }
+          }
+        }
+
         Box {
           FilledTonalButton(
             onClick = { showThinkingMenu = true },
@@ -91,10 +123,6 @@ fun ChatComposer(
 
         Spacer(modifier = Modifier.weight(1f))
 
-        FilledTonalIconButton(onClick = onShowSessions, modifier = Modifier.size(42.dp)) {
-          Icon(Icons.Default.FolderOpen, contentDescription = "Sessions")
-        }
-
         FilledTonalIconButton(onClick = onRefresh, modifier = Modifier.size(42.dp)) {
           Icon(Icons.Default.Refresh, contentDescription = "Refresh")
         }

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/chat/ChatSheetContent.kt

@@ -14,10 +14,8 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateListOf
-import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
@@ -40,10 +38,9 @@ fun ChatSheetContent(viewModel: MainViewModel) {
   val pendingToolCalls by viewModel.chatPendingToolCalls.collectAsState()
   val sessions by viewModel.chatSessions.collectAsState()
 
-  var showSessions by remember { mutableStateOf(false) }
-
   LaunchedEffect(Unit) {
     viewModel.loadChat("main")
+    viewModel.refreshChatSessions(limit = 200)
   }
 
   val context = LocalContext.current
@@ -87,6 +84,7 @@ fun ChatSheetContent(viewModel: MainViewModel) {
 
     ChatComposer(
       sessionKey = sessionKey,
+      sessions = sessions,
       healthOk = healthOk,
       thinkingLevel = thinkingLevel,
       pendingRunCount = pendingRunCount,
@@ -95,8 +93,11 @@ fun ChatSheetContent(viewModel: MainViewModel) {
       onPickImages = { pickImages.launch("image/*") },
       onRemoveAttachment = { id -> attachments.removeAll { it.id == id } },
       onSetThinkingLevel = { level -> viewModel.setChatThinkingLevel(level) },
-      onShowSessions = { showSessions = true },
-      onRefresh = { viewModel.refreshChat() },
+      onSelectSession = { key -> viewModel.switchChatSession(key) },
+      onRefresh = {
+        viewModel.refreshChat()
+        viewModel.refreshChatSessions(limit = 200)
+      },
       onAbort = { viewModel.abortChat() },
       onSend = { text ->
         val outgoing =
@@ -113,19 +114,6 @@ fun ChatSheetContent(viewModel: MainViewModel) {
       },
     )
   }
-
-  if (showSessions) {
-    ChatSessionsDialog(
-      currentSessionKey = sessionKey,
-      sessions = sessions,
-      onDismiss = { showSessions = false },
-      onRefresh = { viewModel.refreshChatSessions(limit = 50) },
-      onSelect = { key ->
-        viewModel.switchChatSession(key)
-        showSessions = false
-      },
-    )
-  }
 }
 
 data class PendingImageAttachment(

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/chat/SessionFilters.kt

@@ -0,0 +1,46 @@
+package com.steipete.clawdis.node.ui.chat
+
+import com.steipete.clawdis.node.chat.ChatSessionEntry
+
+private const val MAIN_SESSION_KEY = "main"
+private const val RECENT_WINDOW_MS = 24 * 60 * 60 * 1000L
+
+fun resolveSessionChoices(
+  currentSessionKey: String,
+  sessions: List<ChatSessionEntry>,
+  nowMs: Long = System.currentTimeMillis(),
+): List<ChatSessionEntry> {
+  val current = currentSessionKey.trim()
+  val cutoff = nowMs - RECENT_WINDOW_MS
+  val sorted = sessions.sortedByDescending { it.updatedAtMs ?: 0L }
+  val recent = mutableListOf<ChatSessionEntry>()
+  val seen = mutableSetOf<String>()
+  for (entry in sorted) {
+    if (!seen.add(entry.key)) continue
+    if ((entry.updatedAtMs ?: 0L) < cutoff) continue
+    recent.add(entry)
+  }
+
+  val result = mutableListOf<ChatSessionEntry>()
+  val included = mutableSetOf<String>()
+  val mainEntry = sorted.firstOrNull { it.key == MAIN_SESSION_KEY }
+  if (mainEntry != null) {
+    result.add(mainEntry)
+    included.add(MAIN_SESSION_KEY)
+  } else if (current == MAIN_SESSION_KEY) {
+    result.add(ChatSessionEntry(key = MAIN_SESSION_KEY, updatedAtMs = null))
+    included.add(MAIN_SESSION_KEY)
+  }
+
+  for (entry in recent) {
+    if (included.add(entry.key)) {
+      result.add(entry)
+    }
+  }
+
+  if (current.isNotEmpty() && !included.contains(current)) {
+    result.add(ChatSessionEntry(key = current, updatedAtMs = null))
+  }
+
+  return result
+}

apps/android/app/src/test/java/com/steipete/clawdis/node/ui/chat/SessionFiltersTest.kt

@@ -0,0 +1,35 @@
+package com.steipete.clawdis.node.ui.chat
+
+import com.steipete.clawdis.node.chat.ChatSessionEntry
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class SessionFiltersTest {
+  @Test
+  fun sessionChoicesPreferMainAndRecent() {
+    val now = 1_700_000_000_000L
+    val recent1 = now - 2 * 60 * 60 * 1000L
+    val recent2 = now - 5 * 60 * 60 * 1000L
+    val stale = now - 26 * 60 * 60 * 1000L
+    val sessions =
+      listOf(
+        ChatSessionEntry(key = "recent-1", updatedAtMs = recent1),
+        ChatSessionEntry(key = "main", updatedAtMs = stale),
+        ChatSessionEntry(key = "old-1", updatedAtMs = stale),
+        ChatSessionEntry(key = "recent-2", updatedAtMs = recent2),
+      )
+
+    val result = resolveSessionChoices("main", sessions, nowMs = now).map { it.key }
+    assertEquals(listOf("main", "recent-1", "recent-2"), result)
+  }
+
+  @Test
+  fun sessionChoicesIncludeCurrentWhenMissing() {
+    val now = 1_700_000_000_000L
+    val recent = now - 10 * 60 * 1000L
+    val sessions = listOf(ChatSessionEntry(key = "main", updatedAtMs = recent))
+
+    val result = resolveSessionChoices("custom", sessions, nowMs = now).map { it.key }
+    assertEquals(listOf("main", "custom"), result)
+  }
+}