修复新会话页面连接到未安装的agent时，后续连接其它agent没有反应了

src/components/conversations/conversation-detail-panel.tsx

@@ -717,16 +717,8 @@ const ConversationTabView = memo(function ConversationTabView({
       setModeId(null)
       setAgentConnectError(null)
 
-      // If not yet connected, just update state — auto-connect will use the
-      // new agentType once canAutoConnect is satisfied.
       const s = connStatusRef.current
-      if (!s || s === "disconnected" || s === "error") return
+      const doConnect = () => {
-
-      connDisconnect()
-        .catch((e) =>
-          console.error("[ConversationTabView] disconnect old agent:", e)
-        )
-        .finally(() => {
         if (!workingDirForConnection) return
         connConnect(nextAgentType, workingDirForConnection, undefined, {
           source: "auto_link",
@@ -740,7 +732,19 @@ const ConversationTabView = memo(function ConversationTabView({
               console.error("[ConversationTabView] switch agent:", e)
             }
           })
-        })
+      }
+
+      // If not yet connected, directly attempt to connect with the new agent.
+      if (!s || s === "disconnected" || s === "error") {
+        doConnect()
+        return
+      }
+
+      connDisconnect()
+        .catch((e) =>
+          console.error("[ConversationTabView] disconnect old agent:", e)
+        )
+        .finally(doConnect)
     },
     [connConnect, connDisconnect, workingDirForConnection]
   )