fix: only confirm archive when agent is running

Skip the confirmation dialog when archiving idle agents — archive
immediately. Show a warning that the agent will be stopped only when
it is running or initializing.

packages/app/src/components/agent-list.tsx

@@ -261,9 +261,23 @@ export function AgentList({
     [isActionSheetVisible, onAgentSelect],
   );
 
-  const handleAgentLongPress = useCallback((agent: AggregatedAgent) => {
-    setActionAgent(agent);
-  }, []);
+  const handleAgentLongPress = useCallback(
+    (agent: AggregatedAgent) => {
+      const isRunning = agent.status === "running" || agent.status === "initializing";
+      if (isRunning) {
+        setActionAgent(agent);
+        return;
+      }
+
+      const client = useSessionStore.getState().sessions[agent.serverId]?.client ?? null;
+      if (!client) {
+        setActionAgent(agent);
+        return;
+      }
+      void client.archiveAgent(agent.id);
+    },
+    [],
+  );
 
   const handleCloseActionSheet = useCallback(() => {
     setActionAgent(null);
@@ -365,7 +379,9 @@ export function AgentList({
           >
             <View style={styles.sheetHandle} />
             <Text style={styles.sheetTitle}>
-              {isActionDaemonUnavailable ? "Host offline" : "Archive this session?"}
+              {isActionDaemonUnavailable
+                ? "Host offline"
+                : "This agent is still running. Archiving it will stop the agent."}
             </Text>
             <View style={styles.sheetButtonRow}>
               <Pressable

packages/app/src/screens/workspace/workspace-screen.tsx

@@ -1284,15 +1284,21 @@ function WorkspaceScreenContent({ serverId, workspaceId }: WorkspaceScreenProps)
           return;
         }
 
-        const confirmed = await confirmDialog({
-          title: "Archive agent?",
-          message: "This closes the tab and archives the agent.",
-          confirmLabel: "Archive",
-          cancelLabel: "Cancel",
-          destructive: true,
-        });
-        if (!confirmed) {
-          return;
+        const agent =
+          useSessionStore.getState().sessions[normalizedServerId]?.agents?.get(agentId) ?? null;
+        const isRunning = agent?.status === "running" || agent?.status === "initializing";
+
+        if (isRunning) {
+          const confirmed = await confirmDialog({
+            title: "Archive running agent?",
+            message: "This agent is still running. Archiving it will stop the agent and close the tab.",
+            confirmLabel: "Archive",
+            cancelLabel: "Cancel",
+            destructive: true,
+          });
+          if (!confirmed) {
+            return;
+          }
         }
 
         setHoveredTabKey((current) => (current === tabId ? null : current));