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 = ''