feat: treeview with folders, toolbar, file attachments in chat

frontend/src/api/ai.ts

@@ -61,6 +61,14 @@ export interface AIAgent {
   updated_at?: string;
 }
 
+export interface ChatFolder {
+  id: string;
+  name: string;
+  parent_id: string | null;
+  user_id: string;
+  created_at?: string;
+}
+
 export interface ChatSession {
   id: string;
   user_id: string;
@@ -68,6 +76,7 @@ export interface ChatSession {
   title: string;
   is_pinned: boolean;
   is_sidebar: boolean;
+  folder_id: string | null;
   created_at?: string;
   updated_at?: string;
 }
@@ -84,6 +93,15 @@ export interface ChatMessage {
   created_at?: string;
 }
 
+export interface ChatAttachment {
+  id: string;
+  message_id: string | null;
+  session_id: string;
+  filename: string;
+  mime_type: string;
+  size_bytes: number;
+}
+
 export interface AITool {
   name: string;
   description: string;
@@ -126,11 +144,18 @@ export const deleteAgent = (id: string) => apiDelete(`/ai/agents/${id}`);
 
 export const fetchTools = () => apiGet<AITool[]>('/ai/tools');
 
+// ─── Folders ───
+
+export const fetchFolders = () => apiGet<ChatFolder[]>('/ai/folders');
+export const createFolder = (data: { name: string; parent_id?: string }) => apiPost<ChatFolder>('/ai/folders', data);
+export const updateFolder = (id: string, data: Partial<ChatFolder>) => apiPut<ChatFolder>(`/ai/folders/${id}`, data);
+export const deleteFolder = (id: string) => apiDelete(`/ai/folders/${id}`);
+
 // ─── Sessions ───
 
 export const fetchSessions = (isSidebar?: boolean) =>
   apiGet<ChatSession[]>('/ai/sessions', { params: isSidebar !== undefined ? { is_sidebar: isSidebar } : {} });
-export const createSession = (data: { title?: string; agent_id?: string; is_sidebar?: boolean }) =>
+export const createSession = (data: { title?: string; agent_id?: string; is_sidebar?: boolean; folder_id?: string }) =>
   apiPost<ChatSession>('/ai/sessions', data);
 export const updateSession = (id: string, data: Partial<ChatSession>) =>
   apiPut<ChatSession>(`/ai/sessions/${id}`, data);
@@ -141,6 +166,31 @@ export const deleteSession = (id: string) => apiDelete(`/ai/sessions/${id}`);
 export const fetchMessages = (sessionId: string) =>
   apiGet<ChatMessage[]>(`/ai/sessions/${sessionId}/messages`);
 
+// ─── Attachments ───
+
+export const fetchAttachments = (sessionId: string) =>
+  apiGet<ChatAttachment[]>(`/ai/sessions/${sessionId}/attachments`);
+
+export async function uploadAttachment(sessionId: string, file: File): Promise<ChatAttachment> {
+  const formData = new FormData();
+  formData.append('file', file);
+  const csrfToken = sessionStorage.getItem('leocrm_csrf_token');
+  const response = await fetch(`/api/v1/ai/sessions/${sessionId}/attachments`, {
+    method: 'POST',
+    headers: {
+      ...(csrfToken ? { 'X-CSRF-Token': csrfToken } : {}),
+    },
+    credentials: 'include',
+    body: formData,
+  });
+  if (!response.ok) throw new Error(`Upload failed: ${response.status}`);
+  return response.json();
+}
+
+export function getAttachmentDownloadUrl(attachmentId: string): string {
+  return `/api/v1/ai/attachments/${attachmentId}/download`;
+}
+
 // ─── Streaming Chat ───
 
 export interface StreamEvent {