feat: 统一聊天 Markdown 渲染

- 新增 ChatTimeMarkdown 并在管理端、用户端聊天入口复用

- 收敛聊天页面重复 Markdown 样式，保留工具和思考块独立渲染

easyflow-ui-admin/app/src/views/publicChat/index.vue

@@ -12,10 +12,9 @@ import {
   ref,
   watch,
 } from 'vue';
-import ElXMarkdown from 'vue-element-plus-x/es/XMarkdown/index.js';
 import { useRoute, useRouter } from 'vue-router';
 
-import { ChatThinkingBlock } from '@easyflow/common-ui';
+import { ChatThinkingBlock, ChatTimeMarkdown } from '@easyflow/common-ui';
 import { LOGIN_PATH } from '@easyflow/constants';
 import { IconifyIcon } from '@easyflow/icons';
 import { $t } from '@easyflow/locales';
@@ -1854,9 +1853,9 @@ function prefetchVisibleVariants() {
                           ]"
                         >
                           <template v-if="segment.type === 'text'">
-                            <ElXMarkdown
+                            <ChatTimeMarkdown
                               class="public-chat-markdown"
-                              :markdown="segment.content"
+                              :content="segment.content"
                             />
                           </template>
                           <template v-else-if="segment.type === 'thinking'">
@@ -2342,50 +2341,10 @@ function prefetchVisibleVariants() {
   box-shadow: 0 2px 6px rgb(15 23 42 / 5%);
 }
 
-.public-chat-markdown {
-  color: var(--pc-ink);
-}
-
 .public-chat-thinking-block {
   margin-bottom: 8px;
 }
 
-.public-chat-markdown :deep(*) {
-  overflow-wrap: anywhere;
-}
-
-.public-chat-markdown :deep(p) {
-  margin: 0 0 10px;
-}
-
-.public-chat-markdown :deep(p:last-child) {
-  margin-bottom: 0;
-}
-
-.public-chat-markdown :deep(a) {
-  color: var(--pc-primary);
-  word-break: break-all;
-  text-decoration: underline;
-}
-
-.public-chat-markdown :deep(img) {
-  display: block;
-  max-width: min(100%, 420px);
-  height: auto;
-  margin: 10px 0;
-  border: 1px solid #dbe5f1;
-  border-radius: 10px;
-  box-shadow: 0 6px 18px rgb(15 23 42 / 8%);
-}
-
-.public-chat-markdown :deep(pre) {
-  padding: 10px 12px;
-  overflow: auto;
-  background: #f8fafc;
-  border: 1px solid #e2e8f0;
-  border-radius: 8px;
-}
-
 .public-chat-tool-header {
   display: flex;
   gap: 8px;