修复审批请求在聊天中无提示且无法响应 (#467)

* fix: support run approval prompts in chat

* fix(chat): render approval prompts

* fix(chat): dedupe approval pattern labels

* chore: sync approval flow with current main

- update Hermes Agent approval support guidance to PR #21899
- initialize Hermes table schemas in session-sync tests

packages/client/src/components/hermes/chat/ChatInput.vue

@@ -195,7 +195,7 @@ function handleDrop(e: DragEvent) {
 
 function handleSend() {
   const text = inputText.value.trim()
-  if (!text && attachments.value.length === 0) return
+  if (!canSend.value) return
 
   chatStore.sendMessage(text, attachments.value.length > 0 ? attachments.value : undefined)
   inputText.value = ''

packages/client/src/components/hermes/chat/MessageItem.vue

@@ -595,11 +595,15 @@ onBeforeUnmount(() => {
               <MarkdownRenderer v-else-if="message.content" :content="message.content" />
             </template>
 
-            <!-- Render assistant message content -->
+            <!-- Render assistant/system message content -->
             <MarkdownRenderer
               v-if="message.role === 'assistant' && message.content && !parsedThinking.body"
               :content="message.content"
             />
+            <MarkdownRenderer
+              v-else-if="message.role === 'system' && message.content"
+              :content="message.content"
+            />
 
             <span v-if="message.isStreaming && !message.content" class="streaming-dots">
               <span></span><span></span><span></span>