diff --git a/static/src/app/methods/common.ts b/static/src/app/methods/common.ts
index 7209314..e05770f 100644
--- a/static/src/app/methods/common.ts
+++ b/static/src/app/methods/common.ts
@@ -1,6 +1,6 @@
 // @ts-nocheck
-const ENABLE_APP_DEBUG_LOGS = true;
-const TRACE_CONV = true;
+const ENABLE_APP_DEBUG_LOGS = false;
+const TRACE_CONV = false;
 
 export function debugLog(...args) {
   if (!ENABLE_APP_DEBUG_LOGS) return;
diff --git a/static/src/components/chat/ChatArea.vue b/static/src/components/chat/ChatArea.vue
index df65b1b..0017175 100644
--- a/static/src/components/chat/ChatArea.vue
+++ b/static/src/components/chat/ChatArea.vue
@@ -579,7 +579,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue';
+import { computed, onBeforeUnmount, onMounted, ref } from 'vue';
 import ToolAction from '@/components/chat/actions/ToolAction.vue';
 import StackedBlocks from './StackedBlocks.vue';
 import MinimalBlocks from './MinimalBlocks.vue';
@@ -695,17 +695,13 @@ const nowMs = ref(Date.now());
 let timerHandle: number | null = null;
 const debugLoggedSystemActionKeys = new Set<string>();
 const debugLoggedUnknownActionKeys = new Set<string>();
+const CHAT_DEBUG_LOGS = false;
 const userMDebug = (...args: any[]) => {
+  if (!CHAT_DEBUG_LOGS) {
+    return;
+  }
   console.log('[USERMDEBUG]', ...args);
 };
-const safeJson = (value: any) => {
-  try {
-    return JSON.stringify(value);
-  } catch {
-    return '[unserializable]';
-  }
-};
-
 const DEFAULT_GENERATING_TEXT = '生成中…';
 const rootEl = ref<HTMLElement | null>(null);
 const thinkingRefs = new Map<string, HTMLElement | null>();
@@ -898,72 +894,11 @@ function assistantWorkLabel(index: number): string {
 }
 
 onMounted(() => {
-  userMDebug('ChatArea.mounted:tail-shape', {
-    filteredLength: filteredMessages.value.length,
-    tail: filteredMessages.value.slice(-8).map((m, i) => ({
-      idx: filteredMessages.value.length - 8 + i,
-      role: m?.role,
-      actionTypes: Array.isArray(m?.actions) ? m.actions.map((a: any) => a?.type) : []
-    }))
-  });
   timerHandle = window.setInterval(() => {
     nowMs.value = Date.now();
   }, 1000);
 });
 
-watch(
-  filteredMessages,
-  (next) => {
-    const tail = (next || []).slice(-6).map((m: any, i: number) => {
-      const actionTypes = Array.isArray(m?.actions)
-        ? m.actions.map((a: any) => `${a?.type}${a?.streaming ? ':streaming' : ''}`)
-        : [];
-      const idx = (next?.length || 0) - Math.min(6, next?.length || 0) + i;
-      return {
-        idx,
-        role: m?.role,
-        actionTypes,
-        isSubAgentNoticeOnlyMessage: isSubAgentNoticeOnlyMessage(m),
-        followedBySubAgentNotice: isFollowedBySubAgentNotice(idx)
-      };
-    });
-    userMDebug('ChatArea.watch:filteredMessages-changed', {
-      length: next?.length || 0,
-      tail
-    });
-    userMDebug('ChatArea.watch:filteredMessages-changed:json', safeJson({
-      length: next?.length || 0,
-      tail
-    }));
-
-    nextTick(() => {
-      requestAnimationFrame(() => {
-        const root = rootEl.value;
-        if (!root) return;
-        const blocks = Array.from(root.querySelectorAll('.message-block')) as HTMLElement[];
-        const last = blocks.slice(-4);
-        const geometry = last.map((el, i) => {
-          const r = el.getBoundingClientRect();
-          const prev = i > 0 ? last[i - 1].getBoundingClientRect() : null;
-          const gapFromPrev = prev ? Math.round((r.top - prev.bottom) * 100) / 100 : null;
-          return {
-            className: el.className,
-            top: Math.round(r.top * 100) / 100,
-            bottom: Math.round(r.bottom * 100) / 100,
-            height: Math.round(r.height * 100) / 100,
-            gapFromPrev
-          };
-        });
-        userMDebug('ChatArea.layout:last-blocks', {
-          totalBlocks: blocks.length,
-          geometry
-        });
-      });
-    });
-  },
-  { deep: true }
-);
-
 onBeforeUnmount(() => {
   if (timerHandle !== null) {
     clearInterval(timerHandle);
@@ -988,7 +923,7 @@ const splitActionGroups = (actions: any[] = [], messageIndex = 0) => {
   let buffer: any[] = [];
 
   // 调试：记录输入
-  if (actions.length > 0) {
+  if (CHAT_DEBUG_LOGS && actions.length > 0) {
     console.log(`[splitActionGroups] 消息 ${messageIndex}:`, {
       totalActions: actions.length,
       actionTypes: actions.map((a) => a.type),
@@ -1034,7 +969,7 @@ const splitActionGroups = (actions: any[] = [], messageIndex = 0) => {
   flushBuffer();
 
   // 调试：记录输出
-  if (actions.length > 0) {
+  if (CHAT_DEBUG_LOGS && actions.length > 0) {
     console.log(`[splitActionGroups] 消息 ${messageIndex} 结果:`, {
       totalGroups: result.length,
       groups: result.map((g) => ({
diff --git a/static/src/composables/useScrollControl.ts b/static/src/composables/useScrollControl.ts
index dc2f4d4..eb190bb 100644
--- a/static/src/composables/useScrollControl.ts
+++ b/static/src/composables/useScrollControl.ts
@@ -27,31 +27,45 @@ type ScrollOptions = {
   behavior?: ScrollBehavior;
 };
 
+type PendingScrollTask = {
+  rafId: number | null;
+  settleTimer: ReturnType<typeof setTimeout> | null;
+};
+
+const pendingScrollTasks = new WeakMap<HTMLElement, PendingScrollTask>();
+let autoScrollRafId: number | null = null;
+
 export function scrollToBottom(ctx: ScrollContext, options?: ScrollOptions) {
   const messagesArea = ctx.getMessagesAreaElement?.();
   if (!messagesArea) {
     return;
   }
 
-  const attempts = [0, 16, 60, 150, 320, 520]; // 多次尝试覆盖布局抖动/异步伸缩
-  let cancelled = false;
   const useSmooth =
     options?.behavior === 'smooth' && typeof (messagesArea as HTMLElement).scrollTo === 'function';
 
-  const perform = (idx: number) => {
-    if (cancelled) return;
+  let task = pendingScrollTasks.get(messagesArea);
+  if (!task) {
+    task = { rafId: null, settleTimer: null };
+    pendingScrollTasks.set(messagesArea, task);
+  }
+  if (task.rafId !== null) {
+    cancelAnimationFrame(task.rafId);
+    task.rafId = null;
+  }
+  if (task.settleTimer) {
+    clearTimeout(task.settleTimer);
+    task.settleTimer = null;
+  }
+
+  const perform = () => {
     if (ctx.userScrolling && !options?.ignoreUserScrolling) {
-      cancelled = true;
       if (typeof ctx._setScrollingFlag === 'function') {
         ctx._setScrollingFlag(false);
       }
       return;
     }
 
-    if (idx === 0 && typeof ctx._setScrollingFlag === 'function') {
-      ctx._setScrollingFlag(true);
-    }
-
     if (useSmooth) {
       (messagesArea as HTMLElement).scrollTo({
         top: messagesArea.scrollHeight,
@@ -61,10 +75,12 @@ export function scrollToBottom(ctx: ScrollContext, options?: ScrollOptions) {
       messagesArea.scrollTop = messagesArea.scrollHeight;
     }
 
-    if (idx < attempts.length - 1) {
-      setTimeout(() => perform(idx + 1), attempts[idx + 1] - attempts[idx]);
-    } else if (typeof ctx._setScrollingFlag === 'function') {
-      setTimeout(() => ctx._setScrollingFlag && ctx._setScrollingFlag(false), 40);
+    task!.settleTimer = setTimeout(() => {
+      // 补一次，覆盖图片/折叠动画等异步高度变化
+      messagesArea.scrollTop = messagesArea.scrollHeight;
+      if (typeof ctx._setScrollingFlag === 'function') {
+        ctx._setScrollingFlag(false);
+      }
       if (options?.resetUserScrolling) {
         if (typeof ctx.chatSetScrollState === 'function') {
           ctx.chatSetScrollState({ userScrolling: false });
@@ -72,22 +88,33 @@ export function scrollToBottom(ctx: ScrollContext, options?: ScrollOptions) {
           ctx.userScrolling = false;
         }
       }
-    } else if (options?.resetUserScrolling) {
-      if (typeof ctx.chatSetScrollState === 'function') {
-        ctx.chatSetScrollState({ userScrolling: false });
-      } else if ('userScrolling' in ctx) {
-        ctx.userScrolling = false;
-      }
-    }
+      task!.settleTimer = null;
+    }, 120);
   };
 
-  perform(0);
+  if (typeof ctx._setScrollingFlag === 'function') {
+    ctx._setScrollingFlag(true);
+  }
+
+  task.rafId = requestAnimationFrame(() => {
+    task!.rafId = null;
+    perform();
+    if (!task!.settleTimer && typeof ctx._setScrollingFlag === 'function') {
+      ctx._setScrollingFlag(false);
+    }
+  });
 }
 
 export function conditionalScrollToBottom(ctx: ScrollContext) {
   const active = typeof ctx.isOutputActive === 'function' ? ctx.isOutputActive() : true;
   if (ctx.autoScrollEnabled === true && ctx.userScrolling === false && active) {
-    scrollToBottom(ctx);
+    if (autoScrollRafId !== null) {
+      cancelAnimationFrame(autoScrollRafId);
+    }
+    autoScrollRafId = requestAnimationFrame(() => {
+      autoScrollRafId = null;
+      scrollToBottom(ctx);
+    });
   }
 }
 
diff --git a/static/src/stores/monitor.ts b/static/src/stores/monitor.ts
index dab8500..a99c36d 100644
--- a/static/src/stores/monitor.ts
+++ b/static/src/stores/monitor.ts
@@ -20,14 +20,14 @@ const monitorTrace = (label: string) => {
   }
   console.trace(`[Monitor] ${label}`);
 };
-const MONITOR_PROGRESS_DEBUG = true;
+const MONITOR_PROGRESS_DEBUG = false;
 const monitorProgressDebug = (...args: any[]) => {
   if (!MONITOR_PROGRESS_DEBUG) {
     return;
   }
   console.debug('[MonitorProgressStore]', ...args);
 };
-const MONITOR_LIFECYCLE_DEBUG = true;
+const MONITOR_LIFECYCLE_DEBUG = false;
 const monitorLifecycleLog = (...args: any[]) => {
   if (!MONITOR_LIFECYCLE_DEBUG) {
     return;