diff --git a/src/api/settings/workflow/session.ts b/src/api/settings/workflow/session.ts
index 0c319c5..eda2978 100644
--- a/src/api/settings/workflow/session.ts
+++ b/src/api/settings/workflow/session.ts
@@ -54,7 +54,8 @@ export function deleteSessionV2(id: string, requestOptions?: RequestOptions) {
 }
 
 // 删除会话内的对话记录（AI 回复 / 用户问题单条或多条），传 Ids 数组，每项为 { id, type }
-export function deleteSessionRecord(ids: { id: number; type: string }[], requestOptions?: RequestOptions) {
+// 注意：记录 id 为 19 位雪花大整数，超出 JS Number 安全范围，必须用 string 形式传递，否则精度丢失
+export function deleteSessionRecord(ids: { id: string; type: string }[], requestOptions?: RequestOptions) {
 	return request({
 		url: '/ai-agent/session/deleteRecord',
 		method: 'post',
diff --git a/src/views/home/components/ChatList.vue b/src/views/home/components/ChatList.vue
index 5340a4c..c374789 100644
--- a/src/views/home/components/ChatList.vue
+++ b/src/views/home/components/ChatList.vue
@@ -55,6 +55,12 @@
 						<el-icon><Delete /></el-icon>
 					</button>
 				</div>
+				<!-- 用户消息操作栏（hover 显示，仅删除） -->
+				<div v-if="msg.isUser && msg.recordId" class="msg-actions">
+					<button class="msg-action is-danger" title="删除对话" @click="emit('delete', msg)">
+						<el-icon><Delete /></el-icon>
+					</button>
+				</div>
 				<div class="time">{{ msg.time }}</div>
 			</div>
 		</div>
@@ -343,6 +349,10 @@ onMounted(() => {
 	.message-row:hover & {
 		opacity: 1;
 	}
+	/* 用户消息在右侧，操作栏右对齐 */
+	.message-row.is-user & {
+		align-self: flex-end;
+	}
 }
 
 .msg-action {
diff --git a/src/views/home/index.vue b/src/views/home/index.vue
index 1a9a637..64335a5 100644
--- a/src/views/home/index.vue
+++ b/src/views/home/index.vue
@@ -344,8 +344,8 @@ const currentSessionResultsLoading = computed(() => {
 	return !!id && !!sessionResultsLoading[id];
 });
 
-// session/get 分页：打开会话详情默认只拿最近 3 条对话，更早的通过滚动加载更多（下一页更早的记录）
-const SESSION_PAGE_SIZE = 3;
+// session/get 分页：打开会话详情默认只拿最近 10 条对话（约一屏），更早的通过滚动加载更多（下一页更早的记录）
+const SESSION_PAGE_SIZE = 10;
 const sessionPage = reactive<Record<string, { page: number; total: number; loading: boolean; done: boolean }>>({});
 const sessionLoadingMore = reactive<Record<string, boolean>>({});
 const currentSessionHasMore = computed(() => {
@@ -523,22 +523,19 @@ const handleDeleteMessage = async (msg: ChatMessage) => {
 	const idx = list.findIndex((m) => m.id === msg.id);
 	if (idx < 0) return;
 	// 收集后端记录 id（type 传记录类型：chat/workflow）
-	const ids: { id: number; type: string }[] = [];
+	// 记录 id 为 19 位雪花大整数，超出 JS Number 安全范围（2^53-1），必须保留字符串形式，
+	// Number() 转换会导致精度丢失，删除请求发出后与后端实际 id 对不上
+	const ids: { id: string; type: string }[] = [];
 	const pushId = (m: ChatMessage | undefined | null) => {
 		if (!m?.recordId) return;
-		const id = Number(m.recordId);
-		if (!Number.isFinite(id)) return;
+		const id = String(m.recordId).trim();
+		if (!id) return;
 		if (ids.some((d) => d.id === id)) return;
 		ids.push({ id, type: m.recordType || 'chat' });
 	};
+	// 后端一条记录同时承载用户问题与 AI 回复（rq- / ra- 共享同一 recordId），
+	// 删除该记录即删除整组对话，无需向相邻消息扩展查找，避免误删相邻记录
 	pushId(msg);
-	// 向上找最近一条用户消息，一并删除（同一后端记录时自动去重）
-	for (let i = idx - 1; i >= 0; i--) {
-		if (list[i].isUser) {
-			pushId(list[i]);
-			break;
-		}
-	}
 	if (ids.length === 0) {
 		ElMessage.warning('该对话记录尚未生成（执行中），可刷新后再删除');
 		return;