diff --git a/core/web_terminal.py b/core/web_terminal.py
index ffbfa6e..255d538 100644
--- a/core/web_terminal.py
+++ b/core/web_terminal.py
@@ -536,7 +536,7 @@ class WebTerminal(MainTerminal):
         
         
         # 如果是聚焦操作，广播聚焦文件更新
-        if tool_name in ['focus_file', 'unfocus_file', 'modify_file']:
+        if tool_name in ['focus_file', 'unfocus_file', 'modify_file', 'append_to_file']:
             try:
                 focused_files_dict = self.get_focused_files_info()
                 self.broadcast('focused_files_update', focused_files_dict)
diff --git a/static/icons/layers.svg b/static/icons/layers.svg
new file mode 100644
index 0000000..a36c416
--- /dev/null
+++ b/static/icons/layers.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="48" height="48" fill="none" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="opacity:1;"><path d="M12.83 2.18a2 2 0 0 0-1.66 0L2.6 6.08a1 1 0 0 0 0 1.83l8.58 3.91a2 2 0 0 0 1.66 0l8.58-3.9a1 1 0 0 0 0-1.83z"/><path d="M2 12a1 1 0 0 0 .58.91l8.6 3.91a2 2 0 0 0 1.65 0l8.58-3.9A1 1 0 0 0 22 12"/><path d="M2 17a1 1 0 0 0 .58.91l8.6 3.91a2 2 0 0 0 1.65 0l8.58-3.9A1 1 0 0 0 22 17"/></svg>
\ No newline at end of file
diff --git a/static/src/App.vue b/static/src/App.vue
index 433972a..1b93db5 100644
--- a/static/src/App.vue
+++ b/static/src/App.vue
@@ -37,10 +37,11 @@
     </div>
 
     <template v-else>
-      <div class="main-container">
+      <div :class="['main-container', { 'utility-panel-hidden': utilityPanelHidden }]">
         <ConversationSidebar
           :icon-style="iconStyle"
           :format-time="formatTime"
+          :utility-panel-hidden="utilityPanelHidden"
           @toggle="toggleSidebar"
           @create="createNewConversation"
           @search="handleSidebarSearch"
@@ -49,6 +50,7 @@
           @personal="openPersonalPage"
           @delete="deleteConversation"
           @duplicate="duplicateConversation"
+          @toggle-utility-panel="toggleUtilityPanelVisibility"
         />
 
         <LeftPanel
@@ -60,12 +62,14 @@
           :is-connected="isConnected"
           :panel-menu-open="panelMenuOpen"
           :panel-mode="panelMode"
+          :hidden="utilityPanelHidden"
           @toggle-panel-menu="togglePanelMenu"
           @select-panel="selectPanelMode"
           @open-file-manager="openGuiFileManager"
+          @toggle-mode="toggleThinkingMode"
         />
 
-        <div class="resize-handle" @mousedown="startResize('left', $event)"></div>
+        <div v-if="!utilityPanelHidden" class="resize-handle" @mousedown="startResize('left', $event)"></div>
 
         <main class="chat-container">
           <TokenDrawer
diff --git a/static/src/app.ts b/static/src/app.ts
index 1ce0608..e6fc7ba 100644
--- a/static/src/app.ts
+++ b/static/src/app.ts
@@ -192,6 +192,7 @@ const appOptions = {
             ...mapState(useFileStore, ['contextMenu', 'fileTree', 'expandedFolders', 'todoList']),
             ...mapWritableState(useUiStore, [
                 'sidebarCollapsed',
+                'utilityPanelHidden',
                 'panelMode',
                 'panelMenuOpen',
                 'leftWidth',
@@ -314,6 +315,8 @@ const appOptions = {
                 uiSetPanelMode: 'setPanelMode',
                 uiSetPanelMenuOpen: 'setPanelMenuOpen',
                 uiTogglePanelMenu: 'togglePanelMenu',
+                uiToggleUtilityPanelHidden: 'toggleUtilityPanelHidden',
+                uiSetUtilityPanelHidden: 'setUtilityPanelHidden',
                 uiPushToast: 'pushToast',
                 uiUpdateToast: 'updateToast',
                 uiDismissToast: 'dismissToast',
@@ -1613,6 +1616,9 @@ const appOptions = {
             toggleSidebar() {
                 this.uiToggleSidebar();
             },
+            toggleUtilityPanelVisibility() {
+                this.uiToggleUtilityPanelHidden();
+            },
 
             togglePanelMenu() {
                 this.uiTogglePanelMenu();
diff --git a/static/src/components/panels/FocusPanel.vue b/static/src/components/panels/FocusPanel.vue
index e7c8668..9cbf907 100644
--- a/static/src/components/panels/FocusPanel.vue
+++ b/static/src/components/panels/FocusPanel.vue
@@ -24,7 +24,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue';
+import { computed, onMounted, watch } from 'vue';
 import { storeToRefs } from 'pinia';
 import { useFocusStore } from '@/stores/focus';
 
@@ -44,4 +44,23 @@ const focusedCount = computed(() => Object.keys(focusedFileMap.value).length);
 
 const languageClass = (path: string) => props.getLanguageClass(path);
 const formatSize = (size: number) => `${(size / 1024).toFixed(1)}KB`;
+
+const refreshFocusedFiles = () => {
+  focusStore.fetchFocusedFiles().catch(() => {});
+};
+
+onMounted(() => {
+  if (!props.collapsed) {
+    refreshFocusedFiles();
+  }
+});
+
+watch(
+  () => props.collapsed,
+  collapsed => {
+    if (!collapsed) {
+      refreshFocusedFiles();
+    }
+  }
+);
 </script>
diff --git a/static/src/components/panels/LeftPanel.vue b/static/src/components/panels/LeftPanel.vue
index 490c5d8..c371875 100644
--- a/static/src/components/panels/LeftPanel.vue
+++ b/static/src/components/panels/LeftPanel.vue
@@ -1,5 +1,10 @@
 <template>
-  <aside class="sidebar left-sidebar" :style="{ width: width + 'px' }">
+  <aside
+    class="sidebar left-sidebar"
+    :class="{ 'panel-hidden': hidden }"
+    :style="panelStyles"
+    :aria-hidden="hidden ? 'true' : 'false'"
+  >
     <div class="sidebar-status">
       <div class="compact-status-card">
         <div class="status-line">
@@ -11,7 +16,14 @@
             </div>
           </div>
           <div class="status-indicators">
-            <span class="mode-indicator" :class="{ thinking: thinkingMode, fast: !thinkingMode }">
+            <button
+              type="button"
+              class="mode-indicator"
+              :class="{ thinking: thinkingMode, fast: !thinkingMode }"
+              :title="thinkingMode ? '切换到快速模式' : '切换到思考模式'"
+              :aria-pressed="thinkingMode ? 'true' : 'false'"
+              @click="$emit('toggle-mode')"
+            >
               <transition name="mode-icon" mode="out-in">
                 <span
                   class="icon icon-sm"
@@ -20,7 +32,7 @@
                   aria-hidden="true"
                 ></span>
               </transition>
-            </span>
+            </button>
             <span class="connection-dot" :class="{ active: isConnected }" :title="isConnected ? '已连接' : '未连接'"></span>
           </div>
         </div>
@@ -122,7 +134,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref } from 'vue';
+import { computed, ref } from 'vue';
 import { storeToRefs } from 'pinia';
 import FileNode from '@/components/files/FileNode.vue';
 import { useFileStore } from '@/stores/file';
@@ -138,12 +150,14 @@ const props = defineProps<{
   isConnected: boolean;
   panelMenuOpen: boolean;
   panelMode: 'files' | 'todo' | 'subAgents';
+  hidden?: boolean;
 }>();
 
 defineEmits<{
   (event: 'toggle-panel-menu'): void;
   (event: 'select-panel', mode: 'files' | 'todo' | 'subAgents'): void;
   (event: 'open-file-manager'): void;
+  (event: 'toggle-mode'): void;
 }>();
 
 const panelMenuWrapper = ref<HTMLElement | null>(null);
@@ -156,6 +170,15 @@ const openSubAgent = (agent: any) => {
   subAgentStore.openSubAgent(agent);
 };
 
+const panelStyles = computed(() => {
+  const basis = props.hidden ? 0 : props.width;
+  return {
+    width: `${basis}px`,
+    minWidth: `${basis}px`,
+    flexBasis: `${basis}px`
+  };
+});
+
 defineExpose({
   panelMenuWrapper
 });
diff --git a/static/src/components/sidebar/ConversationSidebar.vue b/static/src/components/sidebar/ConversationSidebar.vue
index ef128ca..4db2c12 100644
--- a/static/src/components/sidebar/ConversationSidebar.vue
+++ b/static/src/components/sidebar/ConversationSidebar.vue
@@ -54,6 +54,20 @@
               </slot>
             </span>
           </button>
+          <button
+            v-if="collapsed"
+            type="button"
+            class="collapsed-control-btn utility-panel-toggle-btn"
+            :class="{ active: utilityPanelHidden }"
+            :title="utilityPanelHidden ? '显示工作面板' : '隐藏工作面板'"
+            @click="$emit('toggle-utility-panel')"
+            :aria-pressed="utilityPanelHidden ? 'true' : 'false'"
+          >
+            <span class="sr-only">{{ utilityPanelHidden ? '显示' : '隐藏' }}工作面板</span>
+            <span class="layers-icon" aria-hidden="true">
+              <span class="icon icon-md" :style="iconStyle('layers')"></span>
+            </span>
+          </button>
         </div>
       </template>
       <template v-else>
@@ -153,6 +167,7 @@
 <script setup lang="ts">
 defineOptions({ name: 'ConversationSidebar' });
 
+import { computed } from 'vue';
 import { storeToRefs } from 'pinia';
 import { useUiStore } from '@/stores/ui';
 import { useConversationStore } from '@/stores/conversation';
@@ -161,6 +176,7 @@ import { usePersonalizationStore } from '@/stores/personalization';
 const props = defineProps<{
   formatTime?: (input: unknown) => string;
   iconStyle?: (key: string) => Record<string, string>;
+  utilityPanelHidden?: boolean;
 }>();
 
 defineEmits<{
@@ -172,6 +188,7 @@ defineEmits<{
   (event: 'personal'): void;
   (event: 'delete', id: string): void;
   (event: 'duplicate', id: string): void;
+  (event: 'toggle-utility-panel'): void;
 }>();
 
 const uiStore = useUiStore();
@@ -191,4 +208,5 @@ const { visible: personalPageVisible } = storeToRefs(personalizationStore);
 
 const formatTime = (value: unknown) => (props.formatTime ? props.formatTime(value) : String(value));
 const iconStyle = (key: string) => (props.iconStyle ? props.iconStyle(key) : {});
+const utilityPanelHidden = computed(() => !!props.utilityPanelHidden);
 </script>
diff --git a/static/src/stores/ui.ts b/static/src/stores/ui.ts
index f2a2064..65dde47 100644
--- a/static/src/stores/ui.ts
+++ b/static/src/stores/ui.ts
@@ -48,6 +48,7 @@ interface EasterEggState {
 
 interface UiState {
   sidebarCollapsed: boolean;
+  utilityPanelHidden: boolean;
   panelMode: PanelMode;
   panelMenuOpen: boolean;
   leftWidth: number;
@@ -69,6 +70,7 @@ interface UiState {
 export const useUiStore = defineStore('ui', {
   state: (): UiState => ({
     sidebarCollapsed: true,
+    utilityPanelHidden: false,
     panelMode: 'files',
     panelMenuOpen: false,
     leftWidth: 350,
@@ -98,6 +100,12 @@ export const useUiStore = defineStore('ui', {
     setSidebarCollapsed(collapsed: boolean) {
       this.sidebarCollapsed = collapsed;
     },
+    setUtilityPanelHidden(hidden: boolean) {
+      this.utilityPanelHidden = hidden;
+    },
+    toggleUtilityPanelHidden() {
+      this.utilityPanelHidden = !this.utilityPanelHidden;
+    },
     toggleSidebar() {
       this.sidebarCollapsed = !this.sidebarCollapsed;
     },
diff --git a/static/src/styles/components/chat/_chat-area.scss b/static/src/styles/components/chat/_chat-area.scss
index 5d05775..b6bce77 100644
--- a/static/src/styles/components/chat/_chat-area.scss
+++ b/static/src/styles/components/chat/_chat-area.scss
@@ -22,6 +22,18 @@
     position: relative;
 }
 
+.main-container.utility-panel-hidden .messages-area {
+    max-width: 960px;
+    margin: 0 auto;
+    width: 100%;
+    padding-left: clamp(24px, 6vw, 72px);
+    padding-right: clamp(24px, 6vw, 72px);
+}
+
+.main-container.utility-panel-hidden .message-block {
+    width: 100%;
+}
+
 .chat-container .input-area {
     position: absolute;
     left: 0;
diff --git a/static/src/styles/components/panels/_focus-panel.scss b/static/src/styles/components/panels/_focus-panel.scss
index 9bfaa03..61759f8 100644
--- a/static/src/styles/components/panels/_focus-panel.scss
+++ b/static/src/styles/components/panels/_focus-panel.scss
@@ -1,13 +1,17 @@
 /* 聚焦文件 */
 .focused-files {
     padding: 16px;
+    background: rgba(255, 255, 255, 0.4);
 }
 
-o-files {
+.no-files {
     text-align: center;
     color: var(--claude-text-secondary);
     padding: 60px 20px;
     font-size: 14px;
+    background: #fff;
+    border-radius: 12px;
+    border: 1px dashed var(--claude-border);
 }
 
 .file-tabs {
@@ -17,21 +21,21 @@ o-files {
 }
 
 .file-tab {
-    border: 1px solid var(--claude-border);
-    border-radius: 12px;
+    border: 1px solid rgba(118, 103, 84, 0.15);
+    border-radius: 14px;
     overflow: hidden;
-    background: rgba(255, 255, 255, 0.75);
-    box-shadow: 0 12px 28px rgba(61, 57, 41, 0.08);
+    background: #fff;
+    box-shadow: 0 10px 24px rgba(61, 57, 41, 0.08);
 }
 
 .tab-header {
-    background: rgba(218, 119, 86, 0.08);
-    padding: 10px 16px;
+    background: rgba(247, 244, 240, 0.9);
+    padding: 10px 18px;
     display: flex;
     justify-content: space-between;
     align-items: center;
     font-size: 14px;
-    border-bottom: 1px solid var(--claude-border);
+    border-bottom: 1px solid rgba(118, 103, 84, 0.12);
 }
 
 .file-name {
@@ -45,19 +49,22 @@ o-files {
 }
 
 .file-content {
-    max-height: 320px;
+    max-height: 340px;
     overflow-y: auto;
-    background: #1e1e1e;
+    background: #fff;
 }
 
 .file-content pre {
     margin: 0;
-    padding: 16px;
+    padding: 16px 20px;
+    background: transparent;
 }
 
 .file-content code {
     font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
     font-size: 13px;
     line-height: 1.5;
-    color: #aed581;
+    color: #2c2c2c;
+    white-space: pre-wrap;
+    word-break: break-word;
 }
diff --git a/static/src/styles/components/panels/_left-panel.scss b/static/src/styles/components/panels/_left-panel.scss
index 45581f6..12e5861 100644
--- a/static/src/styles/components/panels/_left-panel.scss
+++ b/static/src/styles/components/panels/_left-panel.scss
@@ -23,6 +23,24 @@
 .sidebar.left-sidebar {
     display: flex;
     flex-direction: column;
+    transition:
+        width 0.35s cubic-bezier(0.4, 0, 0.2, 1),
+        min-width 0.35s cubic-bezier(0.4, 0, 0.2, 1),
+        flex-basis 0.35s cubic-bezier(0.4, 0, 0.2, 1),
+        transform 0.35s ease,
+        opacity 0.35s ease;
+}
+
+.sidebar.left-sidebar.panel-hidden {
+    opacity: 0;
+    transform: translateY(-80px);
+    pointer-events: none;
+}
+
+.sidebar.left-sidebar.panel-hidden .sidebar-status,
+.sidebar.left-sidebar.panel-hidden .sidebar-panel-card-wrapper {
+    opacity: 0;
+    transition: opacity 0.2s ease;
 }
 
 .sidebar-status {
@@ -86,6 +104,8 @@
     color: #fffef8;
     box-shadow: 0 8px 20px rgba(189, 93, 58, 0.25);
     transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
+    border: none;
+    cursor: pointer;
 }
 
 .mode-indicator.fast {
@@ -224,6 +244,7 @@
     flex-direction: column;
     overflow: hidden;
     min-height: 0;
+    overflow-x: hidden;
 }
 
 .sidebar-panel-card .sidebar-header {
diff --git a/static/src/styles/components/sidebar/_conversation.scss b/static/src/styles/components/sidebar/_conversation.scss
index 9aa79ab..ceb9167 100644
--- a/static/src/styles/components/sidebar/_conversation.scss
+++ b/static/src/styles/components/sidebar/_conversation.scss
@@ -142,6 +142,34 @@
     stroke-linejoin: round;
 }
 
+.utility-panel-toggle-btn {
+    width: 48px;
+    height: 48px;
+    border-radius: 24px;
+    border: none;
+    background: transparent;
+    color: #2f251b;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    transition: color 0.25s ease, transform 0.2s ease;
+    padding: 0;
+}
+
+.utility-panel-toggle-btn .icon {
+    --icon-size: 22px;
+    display: inline-flex;
+}
+
+.utility-panel-toggle-btn:hover,
+.utility-panel-toggle-btn:focus-visible {
+    color: var(--claude-accent);
+}
+
+.utility-panel-toggle-btn.active {
+    color: #2f251b;
+}
+
 .new-conversation-btn {
     flex: 1;
     background: linear-gradient(135deg, var(--claude-accent) 0%, var(--claude-accent-strong) 100%);
diff --git a/static/src/styles/layout/_app-shell.scss b/static/src/styles/layout/_app-shell.scss
index cd35061..bb78207 100644
--- a/static/src/styles/layout/_app-shell.scss
+++ b/static/src/styles/layout/_app-shell.scss
@@ -9,6 +9,14 @@
     color: var(--claude-text);
 }
 
+.main-container.utility-panel-hidden {
+    background: var(--claude-bg);
+}
+
+.main-container.utility-panel-hidden .chat-container {
+    background: rgba(255, 255, 255, 0.92);
+}
+
 #app {
     min-height: var(--app-viewport, 100vh);
     background: var(--claude-bg);
diff --git a/static/src/utils/icons.ts b/static/src/utils/icons.ts
index 2e87f02..c4f9d19 100644
--- a/static/src/utils/icons.ts
+++ b/static/src/utils/icons.ts
@@ -17,6 +17,7 @@ export const ICONS = Object.freeze({
   hammer: '/static/icons/hammer.svg',
   info: '/static/icons/info.svg',
   laptop: '/static/icons/laptop.svg',
+  layers: '/static/icons/layers.svg',
   menu: '/static/icons/menu.svg',
   monitor: '/static/icons/monitor.svg',
   octagon: '/static/icons/octagon.svg',
diff --git a/sub_agent/core/web_terminal.py b/sub_agent/core/web_terminal.py
index c5a22f9..9cb0c02 100644
--- a/sub_agent/core/web_terminal.py
+++ b/sub_agent/core/web_terminal.py
@@ -525,7 +525,7 @@ class WebTerminal(MainTerminal):
         
         
         # 如果是聚焦操作，广播聚焦文件更新
-        if tool_name in ['focus_file', 'unfocus_file', 'modify_file']:
+        if tool_name in ['focus_file', 'unfocus_file', 'modify_file', 'append_to_file']:
             try:
                 focused_files_dict = self.get_focused_files_info()
                 self.broadcast('focused_files_update', focused_files_dict)
diff --git a/sub_agent/web_server.py b/sub_agent/web_server.py
index 8ad8921..b896247 100644
--- a/sub_agent/web_server.py
+++ b/sub_agent/web_server.py
@@ -2757,6 +2757,10 @@ async def handle_task_with_sender(terminal: WebTerminal, message, sender, client
                 if refreshed.get("success"):
                     web_terminal.focused_files[path] = refreshed["content"]
                     debug_log(f"聚焦文件已刷新: {path}")
+                    try:
+                        sender('focused_files_update', web_terminal.get_focused_files_info())
+                    except Exception as focus_exc:
+                        debug_log(f"广播聚焦文件更新失败: {focus_exc}")
             
             debug_log(f"追加写入完成: {summary}")
         else:
@@ -3108,6 +3112,10 @@ async def handle_task_with_sender(terminal: WebTerminal, message, sender, client
             if refreshed.get("success"):
                 web_terminal.focused_files[path] = refreshed["content"]
                 debug_log(f"聚焦文件已刷新: {path}")
+                try:
+                    sender('focused_files_update', web_terminal.get_focused_files_info())
+                except Exception as focus_exc:
+                    debug_log(f"广播聚焦文件更新失败: {focus_exc}")
         
         pending_modify = None
         modify_probe_buffer = ""
@@ -4093,7 +4101,7 @@ async def handle_task_with_sender(terminal: WebTerminal, message, sender, client
             sender('update_action', update_payload)
             
             # 更新UI状态
-            if function_name in ['focus_file', 'unfocus_file', 'modify_file']:
+            if function_name in ['focus_file', 'unfocus_file', 'modify_file', 'append_to_file']:
                 sender('focused_files_update', web_terminal.get_focused_files_info())
             
             if function_name in ['create_file', 'delete_file', 'rename_file', 'create_folder']:
diff --git a/web_server.py b/web_server.py
index 67c8eb4..1db6502 100644
--- a/web_server.py
+++ b/web_server.py
@@ -2662,6 +2662,10 @@ async def handle_task_with_sender(terminal: WebTerminal, message, sender, client
                 if refreshed.get("success"):
                     web_terminal.focused_files[path] = refreshed["content"]
                     debug_log(f"聚焦文件已刷新: {path}")
+                    try:
+                        sender('focused_files_update', web_terminal.get_focused_files_info())
+                    except Exception as focus_exc:
+                        debug_log(f"广播聚焦文件更新失败: {focus_exc}")
             
             debug_log(f"追加写入完成: {summary}")
         else:
@@ -2961,7 +2965,8 @@ async def handle_task_with_sender(terminal: WebTerminal, message, sender, client
             summary_parts.append(apply_result["error"])
         
         matching_note = "提示：补丁匹配基于完整文本，包含注释和空白符，请确保 <<<OLD>>> 段落与文件内容逐字一致。如果修改成功，请忽略，如果失败，请明确原文后再次尝试。"
-        summary_parts.append(matching_note)
+        if failed_blocks or not completed_blocks:
+            summary_parts.append(matching_note)
         summary_message = " ".join(summary_parts).strip()
         result["summary_message"] = summary_message
         result["success"] = bool(completed_blocks) and not failed_blocks and apply_result.get("error") is None
@@ -3013,6 +3018,10 @@ async def handle_task_with_sender(terminal: WebTerminal, message, sender, client
             if refreshed.get("success"):
                 web_terminal.focused_files[path] = refreshed["content"]
                 debug_log(f"聚焦文件已刷新: {path}")
+                try:
+                    sender('focused_files_update', web_terminal.get_focused_files_info())
+                except Exception as focus_exc:
+                    debug_log(f"广播聚焦文件更新失败: {focus_exc}")
         
         pending_modify = None
         modify_probe_buffer = ""
@@ -4089,7 +4098,7 @@ async def handle_task_with_sender(terminal: WebTerminal, message, sender, client
             sender('update_action', update_payload)
             
             # 更新UI状态
-            if function_name in ['focus_file', 'unfocus_file', 'modify_file']:
+            if function_name in ['focus_file', 'unfocus_file', 'modify_file', 'append_to_file']:
                 sender('focused_files_update', web_terminal.get_focused_files_info())
             
             if function_name in ['create_file', 'delete_file', 'rename_file', 'create_folder']: