diff --git a/Sources/App/AppDelegate.swift b/Sources/App/AppDelegate.swift
index 02a663d..67cbdb3 100644
--- a/Sources/App/AppDelegate.swift
+++ b/Sources/App/AppDelegate.swift
@@ -55,7 +55,6 @@ final class AppDelegate: NSObject, NSApplicationDelegate, NSSpeechSynthesizerDel
         // 两个权限都 OK → 直接启动
         if hasAccessibility && hasInputMonitoring {
             startKeyMonitor()
-            showReadyAlert()
             return
         }
 
diff --git a/Sources/UI/AgentNotchView.swift b/Sources/UI/AgentNotchView.swift
index 4ec0fa4..2b01faf 100644
--- a/Sources/UI/AgentNotchView.swift
+++ b/Sources/UI/AgentNotchView.swift
@@ -126,9 +126,7 @@ struct AgentNotchView: View {
     // MARK: - 实时流式输出
 
     private var streamingContentView: some View {
-        let hasTools = !tracker.toolEntries.isEmpty
-
-        return ScrollViewReader { proxy in
+        ScrollViewReader { proxy in
             ScrollView(.vertical, showsIndicators: false) {
                 Text(tracker.streamingContent)
                     .font(.system(size: 12))
@@ -137,8 +135,8 @@ struct AgentNotchView: View {
                     .frame(maxWidth: .infinity, alignment: .leading)
                     .id("streaming_bottom")
             }
-            .frame(height: hasTools ? maxStreamingHeight : nil)
-            .frame(maxHeight: maxStreamingHeight)
+            .frame(minHeight: 40, maxHeight: maxStreamingHeight)
+            .layoutPriority(1)
             .padding(.horizontal, 14)
             .padding(.vertical, 6)
             .onChange(of: tracker.streamingContent) { _, _ in
@@ -172,11 +170,10 @@ struct AgentNotchView: View {
             .clipped()
             .padding(.horizontal, 4)
             .onReceive(tracker.$toolEntries) { entries in
-                // 并行工具调用防抖：0.1s 内连续出现只滚一次到底
                 scrollWorkItem?.cancel()
                 let workItem = DispatchWorkItem {
-                    withAnimation {
-                        if let lastID = entries.last?.id {
+                    if let lastID = entries.last?.id {
+                        withAnimation(nil) {
                             proxy.scrollTo(lastID, anchor: .bottom)
                         }
                     }