📁 feat: Integrate SharePoint File Picker and Download Workflow (#8651)

* feat(sharepoint): integrate SharePoint file picker and download workflow
Introduces end‑to‑end SharePoint import support:
* Token exchange with Microsoft Graph and scope management (`useSharePointToken`)
* Re‑usable hooks: `useSharePointPicker`, `useSharePointDownload`,
  `useSharePointFileHandling`
* FileSearch dropdown now offers **From Local Machine** / **From SharePoint**
  sources and gracefully falls back when SharePoint is disabled
* Agent upload model, `AttachFileMenu`, and `DropdownPopup` extended for
  SharePoint files and sub‑menus
* Blurry overlay with progress indicator and `maxSelectionCount` limit during
  downloads
* Cache‑flush utility (`config/flush-cache.js`) supporting Redis & filesystem,
  with dry‑run and npm script
* Updated `SharePointIcon` (uses `currentColor`) and new i18n keys
* Bug fixes: placeholder syntax in progress message, picker event‑listener
  cleanup
* Misc style and performance optimizations

* Fix ESLint warnings

---------

Co-authored-by: Atef Bellaaj <slalom.bellaaj@external.daimlertruck.com>

packages/data-provider/src/api-endpoints.ts

@@ -305,3 +305,7 @@ export const verifyTwoFactorTemp = () => '/api/auth/2fa/verify-temp';
 export const memories = () => '/api/memories';
 export const memory = (key: string) => `${memories()}/${encodeURIComponent(key)}`;
 export const memoryPreferences = () => `${memories()}/preferences`;
+
+// SharePoint Graph API Token
+export const graphToken = (scopes: string) =>
+  `/api/auth/graph-token?scopes=${encodeURIComponent(scopes)}`;

packages/data-provider/src/config.ts

@@ -597,6 +597,11 @@ export type TStartupConfig = {
   instanceProjectId: string;
   bundlerURL?: string;
   staticBundlerURL?: string;
+  sharePointFilePickerEnabled?: boolean;
+  sharePointBaseUrl?: string;
+  sharePointPickerGraphScope?: string;
+  sharePointPickerSharePointScope?: string;
+  openidReuseTokens?: boolean;
   webSearch?: {
     searchProvider?: SearchProviders;
     scraperType?: ScraperTypes;

packages/data-provider/src/data-service.ts

@@ -858,3 +858,8 @@ export const createMemory = (data: {
 }): Promise<{ created: boolean; memory: q.TUserMemory }> => {
   return request.post(endpoints.memories(), data);
 };
+
+// SharePoint Graph API Token
+export function getGraphApiToken(params: q.GraphTokenParams): Promise<q.GraphTokenResponse> {
+  return request.get(endpoints.graphToken(params.scopes));
+}

packages/data-provider/src/keys.ts

@@ -50,6 +50,7 @@ export enum QueryKeys {
   banner = 'banner',
   /* Memories */
   memories = 'memories',
+  graphToken = 'graphToken',
 }
 
 // Dynamic query keys that require parameters

packages/data-provider/src/types/queries.ts

@@ -147,3 +147,15 @@ export interface MCPAuthValuesResponse {
   serverName: string;
   authValueFlags: Record<string, boolean>;
 }
+
+/* SharePoint Graph API Token */
+export type GraphTokenParams = {
+  scopes: string;
+};
+
+export type GraphTokenResponse = {
+  access_token: string;
+  token_type: string;
+  expires_in: number;
+  scope: string;
+};