fix: polish streaming state and ui controls

static/src/app.ts

@@ -940,9 +940,10 @@ const appOptions = {
                         if (action.tool.awaiting_content) {
                             return true;
                         }
-                        const status = typeof action.tool.status === 'string'
+                        const status =
-                            ? action.tool.status.toLowerCase()
+                            typeof action.tool.status === 'string'
-                            : '';
+                                ? action.tool.status.toLowerCase()
+                                : '';
                         return !status || ['preparing', 'running', 'pending', 'queued'].includes(status);
                     });
                 });

static/src/components/sidebar/ConversationSidebar.vue

@@ -82,9 +82,7 @@
         @click="$emit('toggle-workspace')"
       >
         <span class="sr-only">{{ workspaceCollapsed ? '显示工作区' : '隐藏工作区' }}</span>
-        <span class="workspace-immersive-icon" aria-hidden="true">
+        <span class="workspace-immersive-icon icon" aria-hidden="true" :style="iconStyle('layers')"></span>
-          <img :src="workspaceToggleIcon" alt="" />
-        </span>
         <span v-if="!collapsed" class="workspace-immersive-label">
           {{ workspaceCollapsed ? '显示工作区' : '隐藏工作区' }}
         </span>
@@ -227,5 +225,4 @@ const iconStyle = (key: string) => (props.iconStyle ? props.iconStyle(key) : {})
 const resolvedShowCollapseButton = computed(() => props.showCollapseButton);
 const resolvedCollapseButtonVariant = computed(() => props.collapseButtonVariant);
 
-const workspaceToggleIcon = new URL('../../../icons/layers.svg', import.meta.url).href;
 </script>

static/src/composables/useLegacySocket.ts

@@ -140,7 +140,11 @@ export async function initializeLegacySocket(ctx: any) {
             const action = ensureActiveTextAction();
             if (action) {
                 action.streaming = false;
-                action.content = fullContent;
+                const fallback =
+                    (typeof fullContent === 'string' && fullContent.length
+                        ? fullContent
+                        : action.content) || '';
+                action.content = fallback;
             }
             msg.streamingText = '';
             msg.currentStreamingType = null;

static/src/stores/chat.ts

@@ -264,7 +264,9 @@ export const useChatStore = defineStore('chat', {
         const action = msg.actions[i];
         if (action.type === 'text' && action.streaming) {
           action.streaming = false;
-          action.content = fullContent;
+          if (typeof fullContent === 'string' && fullContent.length) {
+            action.content = fullContent;
+          }
           break;
         }
       }

static/src/styles/components/chat/_chat-area.scss

@@ -197,6 +197,11 @@
     font-size: 13px;
     line-height: 1.6;
     color: var(--claude-text-secondary);
+    scrollbar-width: none;
+}
+
+.thinking-content::-webkit-scrollbar {
+    display: none;
 }
 
 .collapsible-block {

static/src/styles/components/sidebar/_conversation.scss

@@ -86,7 +86,9 @@
     padding: 10px 14px;
     cursor: pointer;
     font-size: 13px;
-    transition: color 0.2s ease, background-color 0.2s ease;
+    transition:
+        color 0.2s ease,
+        transform 0.2s ease;
 }
 
 .workspace-immersive-btn .workspace-immersive-icon {
@@ -97,11 +99,6 @@
     justify-content: center;
 }
 
-.workspace-immersive-btn .workspace-immersive-icon img {
-    width: 100%;
-    height: 100%;
-}
-
 .workspace-immersive-btn .workspace-immersive-label {
     font-size: 13px;
     font-weight: 500;
@@ -111,6 +108,7 @@
 .workspace-immersive-btn:focus-visible {
     color: var(--claude-accent);
     outline: none;
+    transform: translateY(-1px);
 }
 
 .workspace-immersive-btn.active {

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',