feat(pc-client): 第二批登录、会话、聊天与添加同事界面按规范收口

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

pc-client/src/pages/chat/EmptyChat.tsx

@@ -1,23 +1,26 @@
 import { Layout } from "antd";
 import { useTranslation } from "react-i18next";
 
+const LinearChatIcon = () => (
+  <svg width="64" height="64" viewBox="0 0 24 24" fill="none">
+    <path
+      d="M5 6.5h14a1.5 1.5 0 0 1 1.5 1.5v8a1.5 1.5 0 0 1-1.5 1.5h-7.2L7 20.5v-2.5H5A1.5 1.5 0 0 1 3.5 16V8A1.5 1.5 0 0 1 5 6.5Z"
+      stroke="var(--gap-text)"
+      strokeWidth="1.6"
+      strokeLinejoin="round"
+    />
+  </svg>
+);
+
 export const EmptyChat = () => {
   const { t } = useTranslation();
 
   return (
-    <Layout className="no-mobile flex items-center justify-center !bg-[var(--chat-bg)]">
+    <Layout className="no-mobile flex items-center justify-center bg-[var(--chat-bg)]">
       <div className="flex flex-col items-center">
-        <div className="flex h-16 w-16 items-center justify-center rounded-2xl bg-[var(--primary)]">
-          <svg width="34" height="34" viewBox="0 0 24 24" fill="none">
-            <path
-              d="M12 3C6.98 3 3 6.58 3 11.1c0 2.5 1.28 4.73 3.28 6.24-.1.84-.46 1.87-1.02 2.66-.15.21.02.5.27.44 1.53-.34 2.92-1.03 3.9-1.73.82.18 1.68.29 2.57.29 5.02 0 9-3.58 9-8.1S17.02 3 12 3Z"
-              fill="#fff"
-            />
-          </svg>
-        </div>
-        <div className="mt-4 text-base font-medium">{t("placeholder.title")}</div>
-        <div className="mt-1 text-xs text-[var(--sub-text)]">
-          {t("placeholder.subTitle")}
+        <LinearChatIcon />
+        <div className="mt-4 text-base font-medium text-[var(--base-black)]">
+          {t("placeholder.emptyChat")}
         </div>
       </div>
     </Layout>