feat: 我的笔记列表与详情页 UI 重构（Gemini 风格）

- StudioNotebooksPage: 卡片改为灰底无边框圆角网格，hover 显示三点菜单，支持重命名（PATCH）和删除（DELETE）
- StudioNotebookDetailPage: 详情页背景改为主题色渐变，内容垂直居中，输入框内联布局，模型选择器移至右侧，历史对话限显 5 条可展开/滚动
- api.ts: 新增 deleteSearchSpace、renameSearchSpace、uploadSourceText 接口
- 来源 Dialog：新增「复制的文字」面板，支持粘贴文本上传

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend-web/src/core/studio/api.ts

@@ -49,6 +49,43 @@ export async function createSearchSpace(
   if (!res.ok) throw new Error(`创建失败：${res.status}`);
 }
 
+export async function uploadSourceText(
+  notebookId: number,
+  content: string,
+  title: string,
+  token: string,
+): Promise<void> {
+  const apiBase = base();
+  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");
+  const res = await fetch(`${apiBase}/api/v1/documents/textupload`, {
+    method: "POST",
+    headers: { "Content-Type": "application/json", Authorization: `Bearer ${token}` },
+    body: JSON.stringify({ search_space_id: notebookId, content, title: title || "粘贴的文字" }),
+  });
+  if (!res.ok) throw new Error(`上传失败：${res.status}`);
+}
+
+export async function deleteSearchSpace(id: number, token: string): Promise<void> {
+  const apiBase = base();
+  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");
+  const res = await fetch(`${apiBase}/api/v1/searchspaces/${id}`, {
+    method: "DELETE",
+    headers: { Authorization: `Bearer ${token}` },
+  });
+  if (!res.ok) throw new Error(`删除失败：${res.status}`);
+}
+
+export async function renameSearchSpace(id: number, name: string, token: string): Promise<void> {
+  const apiBase = base();
+  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");
+  const res = await fetch(`${apiBase}/api/v1/searchspaces/${id}`, {
+    method: "PATCH",
+    headers: { "Content-Type": "application/json", Authorization: `Bearer ${token}` },
+    body: JSON.stringify({ name }),
+  });
+  if (!res.ok) throw new Error(`重命名失败：${res.status}`);
+}
+
 export interface ChunkRead {
   id: number;
   content: string;