feat: 个人中心界面UI优化，提升商业产品精致度

ProfilePage组件优化：
- 新增个性签名编辑功能（内联编辑/确认/取消交互）
- 新增 icon 导入（EditOutlined, CheckOutlined, CloseOutlined）
- 新增 formatProfileDate 工具函数，统一日期格式化（中文友好）
- 新增 formatTaskType 函数，任务类型中文化显示
- 新增 formatTaskStatus 函数，任务状态中文化显示
- 新增 formatAssetStatus 函数，资产状态中文化显示
- 优化空状态展示，增加图标占位

dark-green主题层样式增强：
- 个人中心背景增加微光渐变（accent光晕+半透明遮罩）
- Banner区域高度优化为214px，增加底部渐变分割线
- Banner叠加层增加径向光晕效果
- Banner编辑按钮增加毛玻璃质感（backdrop-filter）
- 侧边栏/主体/选项卡/列表卡片等多处细节增强
- 按钮、标签、统计数字等组件加入微交互
- 保持暗绿主题配色体系不变，仅提升精致度

src/features/profile/ProfilePage.tsx

@@ -1,7 +1,10 @@
 import {
   CameraOutlined,
+  CheckOutlined,
   CheckCircleFilled,
+  CloseOutlined,
   DeleteOutlined,
+  EditOutlined,
   LockOutlined,
   MailOutlined,
   MobileOutlined,
@@ -135,6 +138,48 @@ function mapAssetToSavedItem(asset: Awaited<ReturnType<typeof assetClient.list>>
   };
 }
 
+function formatProfileDate(value: string | null | undefined): string {
+  if (!value) return "刚刚";
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return value;
+
+  return new Intl.DateTimeFormat("zh-CN", {
+    month: "numeric",
+    day: "numeric",
+    hour: "2-digit",
+    minute: "2-digit",
+  }).format(date);
+}
+
+function formatTaskType(type: WebGenerationPreviewTask["type"]): string {
+  const labels: Record<WebGenerationPreviewTask["type"], string> = {
+    image: "图像",
+    video: "视频",
+    agent: "智能体",
+    "digital-human": "数字人",
+    "character-mix": "角色融合",
+  };
+  return labels[type] || type;
+}
+
+function formatTaskStatus(status: WebGenerationPreviewTask["status"]): string {
+  const labels: Record<WebGenerationPreviewTask["status"], string> = {
+    queued: "排队中",
+    running: "生成中",
+    completed: "已完成",
+    failed: "失败",
+  };
+  return labels[status] || status;
+}
+
+function formatAssetStatus(status: string | undefined): string {
+  const normalized = String(status || "").toLowerCase();
+  if (normalized === "completed" || normalized === "ready" || normalized === "success") return "可用";
+  if (normalized === "running" || normalized === "processing") return "处理中";
+  if (normalized === "failed" || normalized === "error") return "失败";
+  return status || "资产";
+}
+
 function ProfilePage({
   session,
   usage,
@@ -182,6 +227,9 @@ function ProfilePage({
   const [profileNotice, setProfileNotice] = useState<string | null>(null);
   const [localAvatarUrl, setLocalAvatarUrl] = useState(() => session?.user.avatarUrl || readLocalProfileValue(userId, "avatar"));
   const [profileBio, setProfileBio] = useState(() => session?.user.bio || readLocalProfileValue(userId, "bio"));
+  const [isBioEditing, setIsBioEditing] = useState(false);
+  const [bioEditBackup, setBioEditBackup] = useState("");
+  const [bioStatusNotice, setBioStatusNotice] = useState<string | null>(null);
   const [bannerUrl, setBannerUrl] = useState(() => session?.user.backgroundUrl || readLocalProfileValue(userId, "background"));
 
   const completedTasks = tasks.filter((task) => task.status === "completed");
@@ -497,8 +545,29 @@ function ProfilePage({
     void syncProfilePatch({ bio: nextBio || null });
   };
 
+  const startBioEdit = () => {
+    setBioEditBackup(profileBio);
+    setBioStatusNotice(null);
+    setIsBioEditing(true);
+  };
+
+  const confirmBioEdit = () => {
+    handleBioBlur();
+    setIsBioEditing(false);
+    setBioStatusNotice("个性签名已保存");
+  };
+
+  const cancelBioEdit = () => {
+    setProfileBio(bioEditBackup);
+    setIsBioEditing(false);
+    setBioStatusNotice(null);
+  };
+
   const renderEmptyState = (text: string, actionLabel: string, action: () => void) => (
     <div className="profile-page__empty-state">
+      <span className="profile-page__empty-mark" aria-hidden="true">
+        <PlusOutlined />
+      </span>
       <p className="profile-page__empty-text">{text}</p>
       <button type="button" className="profile-page__empty-btn" onClick={action}>
         <PlusOutlined />
@@ -515,12 +584,12 @@ function ProfilePage({
             <article key={task.id} className="profile-page__list-card">
               <div className="profile-page__list-card-head">
                 <strong>{task.title}</strong>
-                <span>{task.type}</span>
+                <span>{formatTaskType(task.type)}</span>
               </div>
               <p>{task.prompt}</p>
               <div className="profile-page__list-card-meta">
-                <span>{task.status}</span>
-                <span>{task.createdAt}</span>
+                <span>{formatTaskStatus(task.status)}</span>
+                <span>{formatProfileDate(task.createdAt)}</span>
               </div>
             </article>
           ))}
@@ -537,7 +606,7 @@ function ProfilePage({
             <article key={project.id} className="profile-page__list-card">
               <div className="profile-page__list-card-head">
                 <strong>{project.name}</strong>
-                <span>{project.updatedAt}</span>
+                <span>{formatProfileDate(project.updatedAt)}</span>
                 {onDeleteProject ? (
                   <button
                     type="button"
@@ -569,12 +638,12 @@ function ProfilePage({
             <article key={asset.id} className="profile-page__list-card">
               <div className="profile-page__list-card-head">
                 <strong>{asset.name}</strong>
-                <span>{asset.status}</span>
+                <span>{formatAssetStatus(asset.status)}</span>
               </div>
               <p>{asset.description}</p>
               <div className="profile-page__list-card-meta">
                 <span>{asset.type}</span>
-                <span>{asset.updatedAt}</span>
+                <span>{formatProfileDate(asset.updatedAt)}</span>
               </div>
             </article>
           ))}
@@ -637,15 +706,39 @@ function ProfilePage({
                 </span>
               </div>
               <strong className="profile-page__username">{displayName}</strong>
-              <textarea
-                className="profile-page__bio"
-                value={profileBio}
-                onChange={(event) => setProfileBio(event.target.value)}
-                onBlur={handleBioBlur}
-                placeholder={displayedBio}
-                rows={2}
-                maxLength={80}
-              />
+              {isBioEditing ? (
+                <div className="profile-page__bio-editor">
+                  <textarea
+                    className="profile-page__bio"
+                    value={profileBio}
+                    onChange={(event) => setProfileBio(event.target.value)}
+                    placeholder="填写一句个人签名"
+                    rows={2}
+                    maxLength={80}
+                    autoFocus
+                  />
+                  <div className="profile-page__bio-actions">
+                    <button type="button" className="profile-page__bio-action profile-page__bio-action--save" onClick={confirmBioEdit}>
+                      <CheckOutlined />
+                      保存
+                    </button>
+                    <button type="button" className="profile-page__bio-action" onClick={cancelBioEdit}>
+                      <CloseOutlined />
+                      取消
+                    </button>
+                  </div>
+                </div>
+              ) : (
+                <button
+                  type="button"
+                  className={`profile-page__bio-display${profileBio.trim() ? "" : " is-empty"}`}
+                  onClick={startBioEdit}
+                >
+                  <span>{displayedBio}</span>
+                  <EditOutlined className="profile-page__bio-edit-icon" />
+                </button>
+              )}
+              {bioStatusNotice ? <span className="profile-page__bio-status">{bioStatusNotice}</span> : null}
               {profileNotice ? <span className="profile-page__sync-notice">{profileNotice}</span> : null}
             </div>
 
@@ -664,18 +757,21 @@ function ProfilePage({
               </div>
             </div>
 
-            <button type="button" className="profile-page__share-btn">
+            <button type="button" className="profile-page__share-btn profile-page__share-btn--plan">
               <ShareAltOutlined />
               {packageLabel}
             </button>
 
-            <button type="button" className="profile-page__share-btn" onClick={onOpenWorkbench}>
+            <button type="button" className="profile-page__share-btn profile-page__share-btn--primary" onClick={onOpenWorkbench}>
+              <PlusOutlined />
               进入工作台
             </button>
-            <button type="button" className="profile-page__share-btn" onClick={onOpenCommunity}>
+            <button type="button" className="profile-page__share-btn profile-page__share-btn--secondary" onClick={onOpenCommunity}>
+              <ShareAltOutlined />
               打开社区
             </button>
-            <button type="button" className="profile-page__share-btn" onClick={onLogout}>
+            <button type="button" className="profile-page__share-btn profile-page__share-btn--danger" onClick={onLogout}>
+              <LockOutlined />
               退出登录
             </button>
           </aside>
@@ -731,13 +827,25 @@ function ProfilePage({
               <div className="profile-page__upload-card profile-page__upload-card--meta">
                 {accountPanel === "credits" ? (
                   <>
-                    <span>当前账号：{displayName}</span>
-                    <span>积分剩余：{(usage.balanceCents / 100).toFixed(2)}</span>
+                    <span className="profile-page__meta-item">
+                      <small>当前账号</small>
+                      <strong>{displayName}</strong>
+                    </span>
+                    <span className="profile-page__meta-item">
+                      <small>积分剩余</small>
+                      <strong>{(usage.balanceCents / 100).toFixed(2)}</strong>
+                    </span>
                   </>
                 ) : (
                   <>
-                    <span>任务总数：{tasks.length}</span>
-                    <span>已完成：{completedTasks.length}</span>
+                    <span className="profile-page__meta-item">
+                      <small>任务总数</small>
+                      <strong>{tasks.length}</strong>
+                    </span>
+                    <span className="profile-page__meta-item">
+                      <small>已完成</small>
+                      <strong>{completedTasks.length}</strong>
+                    </span>
                   </>
                 )}
               </div>