feat: 增加加载动画, 修复已知问题

frontend/src/App.vue

@@ -119,7 +119,7 @@ async function createConversation() {
 
 // -- Select conversation --
 async function selectConversation(id) {
-  // 保存当前对话的流式状态（如果有）
+  // 保存当前对话的流式状态和消息列表（如果有）
   if (currentConvId.value && streaming.value) {
     streamStates.set(currentConvId.value, {
       streaming: true,
@@ -127,11 +127,11 @@ async function selectConversation(id) {
       streamThinking: streamThinking.value,
       streamToolCalls: [...streamToolCalls.value],
       streamProcessSteps: [...streamProcessSteps.value],
+      messages: [...messages.value],  // 保存消息列表（包括临时用户消息）
     })
   }
 
   currentConvId.value = id
-  messages.value = []
   nextMsgCursor.value = null
   hasMoreMessages.value = false
 
@@ -143,16 +143,21 @@ async function selectConversation(id) {
     streamThinking.value = savedState.streamThinking
     streamToolCalls.value = savedState.streamToolCalls
     streamProcessSteps.value = savedState.streamProcessSteps
+    messages.value = savedState.messages || []  // 恢复消息列表
   } else {
     streaming.value = false
     streamContent.value = ''
     streamThinking.value = ''
     streamToolCalls.value = []
     streamProcessSteps.value = []
+    messages.value = []
   }
 
+  // 如果不是正在流式传输，从服务器加载消息
+  if (!streaming.value) {
     await loadMessages(true)
   }
+}
 
 // -- Load messages --
 async function loadMessages(reset = true) {
@@ -277,8 +282,7 @@ async function sendMessage(content) {
       if (currentConvId.value === convId) {
         streaming.value = false
         currentStreamPromise = null
-        // Replace temp message and add assistant message from server
+        // 添加助手消息（保留临时用户消息）
-        messages.value = messages.value.filter(m => m.id !== userMsg.id)
         messages.value.push({
           id: data.message_id,
           conversation_id: convId,

frontend/src/components/ChatView.vue

@@ -46,7 +46,7 @@
             @delete="$emit('deleteMessage', msg.id)"
           />
 
-          <div v-if="streaming" class="message-bubble assistant">
+          <div v-if="streaming" class="message-bubble assistant streaming">
             <div class="avatar">claw</div>
             <div class="message-body">
               <ProcessBlock
@@ -56,6 +56,12 @@
                 :streaming="streaming"
               />
               <div class="message-content streaming-content" v-html="renderedStreamContent || '<span class=\'placeholder\'>...</span>'"></div>
+              <div class="streaming-indicator">
+                <svg class="spinner" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                  <path d="M21 12a9 9 0 1 1-6.219-8.56"/>
+                </svg>
+                <span>正在生成...</span>
+              </div>
             </div>
           </div>
         </div>
@@ -330,6 +336,26 @@ defineExpose({ scrollToBottom })
   word-break: break-word;
 }
 
+.streaming-indicator {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-top: 12px;
+  padding-top: 12px;
+  border-top: 1px solid var(--border-light);
+  font-size: 12px;
+  color: var(--text-tertiary);
+}
+
+.spinner {
+  animation: spin 1s linear infinite;
+}
+
+@keyframes spin {
+  from { transform: rotate(0deg); }
+  to { transform: rotate(360deg); }
+}
+
 .streaming-content :deep(p) {
   margin: 0 0 8px;
 }

frontend/src/components/ProcessBlock.vue

@@ -1,5 +1,17 @@
 <template>
-  <div class="process-block">
+  <div class="process-block" :class="{ 'is-streaming': streaming }">
+    <!-- 流式加载状态 -->
+    <div v-if="streaming && processItems.length === 0" class="streaming-placeholder">
+      <div class="streaming-icon">
+        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+          <path d="M9.663 17h4.673M12 3v1m6.364 1.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.828 9.9a5 5 0 117.072 0l-.548.547A3.374 3.374 0 0014 18.469V19a2 2 0 11-4 0v-.531c0-.895-.356-1.754-.988-2.386l-.548-.547z"/>
+        </svg>
+      </div>
+      <span class="streaming-text">正在思考中<span class="dots">...</span></span>
+    </div>
+
+    <!-- 正常内容 -->
+    <template v-else>
       <button class="process-toggle" @click="toggleAll">
         <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
           <path d="M9.663 17h4.673M12 3v1m6.364 1.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.828 9.9a5 5 0 117.072 0l-.548.547A3.374 3.374 0 0014 18.469V19a2 2 0 11-4 0v-.531c0-.895-.356-1.754-.988-2.386l-.548-.547z"/>
@@ -56,6 +68,7 @@
         </div>
       </div>
     </div>
+    </template>
   </div>
 </template>
 
@@ -267,6 +280,37 @@ watch(() => props.streaming, (streaming) => {
   max-width: 100%;
 }
 
+.streaming-placeholder {
+  padding: 16px 20px;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  background: var(--bg-hover);
+}
+
+.streaming-icon {
+  width: 28px;
+  height: 28px;
+  border-radius: 6px;
+  background: #fef3c7;
+  color: #f59e0b;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  animation: spin 2s linear infinite;
+}
+
+.streaming-text {
+  font-size: 14px;
+  color: var(--text-secondary);
+  font-weight: 500;
+}
+
+.streaming-text .dots {
+  display: inline-block;
+  animation: pulse 1s ease-in-out infinite;
+}
+
 .process-toggle {
   width: 100%;
   padding: 10px 12px;
@@ -406,7 +450,7 @@ watch(() => props.streaming, (streaming) => {
   background: var(--bg-hover);
 }
 
-.process-item.loading .process-icon {
+.process-item.loading.tool_call .process-icon {
   animation: spin 1s linear infinite;
 }