首页选中工作流时禁用底部输入与发送按钮，占位提示引导填写表单

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/home/components/InputBar.vue

@@ -17,7 +17,7 @@
 				v-model="message"
 				type="textarea"
 				:autosize="{ minRows: 1, maxRows: 6 }"
-				:disabled="generating || isWorkflowRunning"
+				:disabled="generating || isWorkflowRunning || selectedWorkflowId !== null"
 				:placeholder="inputPlaceholder"
 				class="message-input"
 				@focus="isFocused = true"
@@ -51,7 +51,7 @@
 					<button
 						class="send-btn"
 						:class="{ 'is-stop': generating && !isWorkflowRunning }"
-						:disabled="isWorkflowRunning || (!generating && sendDisabled)"
+						:disabled="selectedWorkflowId !== null || isWorkflowRunning || (!generating && sendDisabled)"
 						@click="generating && !isWorkflowRunning ? emit('stop') : handleSend()"
 					>
 						<el-icon v-if="generating && !isWorkflowRunning"><VideoPause /></el-icon>
@@ -133,7 +133,11 @@ const lockAll = computed(() => props.isWorkflowRunning || props.generating);
 
 // 输入框占位符：工作流执行中给出明确提示
 const inputPlaceholder = computed(() =>
-	props.isWorkflowRunning ? '工作流执行中，请稍候...' : '有什么想聊的？按 Enter 发送，Shift+Enter 换行',
+	props.isWorkflowRunning
+		? '工作流执行中，请稍候...'
+		: selectedWorkflowId.value !== null
+			? '请填写上方工作流表单，提交后开始执行'
+			: '有什么想聊的？按 Enter 发送，Shift+Enter 换行',
 );
 
 const fetchWorkflows = async () => {