🔍 refactor: OCR Fully Optional with Defaults for "Upload as Text" (#9856)

* refactor: move `loadOCRConfig` from `packages/data-provider` to `packages/api` and return `undefined` if not explicitly configured

* fix: loadOCRConfig import from @librechat/api

* refactor: update defaultTextMimeTypes to support virtually all file types for text parsing

* fix: improve OCR capability check and error message for unsupported file types

* ci: remove unnecessary ocr expectation from AppService test

packages/api/src/files/index.ts

@@ -1,4 +1,5 @@
-export * from './mistral/crud';
 export * from './audio';
-export * from './text';
+export * from './mistral/crud';
+export * from './ocr';
 export * from './parse';
+export * from './text';

packages/api/src/files/mistral/crud.ts

@@ -303,7 +303,7 @@ async function loadAuthConfig(context: OCRContext): Promise<AuthConfig> {
 /**
  * Gets the model configuration
  */
-function getModelConfig(ocrConfig: TCustomConfig['ocr']): string {
+function getModelConfig(ocrConfig?: TCustomConfig['ocr']): string {
   const modelConfig = ocrConfig?.mistralModel || '';
 
   if (!modelConfig.trim()) {

packages/api/src/files/ocr.ts

@@ -0,0 +1,15 @@
+import { OCRStrategy } from 'librechat-data-provider';
+import type { TCustomConfig } from 'librechat-data-provider';
+
+export function loadOCRConfig(config?: TCustomConfig['ocr']): TCustomConfig['ocr'] | undefined {
+  if (!config) return;
+  const baseURL = config?.baseURL ?? '';
+  const apiKey = config?.apiKey ?? '';
+  const mistralModel = config?.mistralModel ?? '';
+  return {
+    apiKey,
+    baseURL,
+    mistralModel,
+    strategy: config?.strategy ?? OCRStrategy.MISTRAL_OCR,
+  };
+}