🐛 fix: Plan extraction with the promoted context resource

An auto-routed text upload promotes its effective resource to context, but the
extraction planner still received the original undefined tool_resource and
returned no document-parser plan. On deployments without RAG a text-routed
DOCX/ODT/XLSX then reached parseText with native fallback and was decoded as
UTF-8 instead of parsed.

api/server/services/Files/process.js

@@ -926,7 +926,7 @@ const processAgentFileUpload = async ({ req, res, metadata, sseStream }) => {
     const fileConfig = mergeFileConfig(appConfig.fileConfig);
     const extractedTextPlan = getUploadExtractedTextPlan({
       endpoint: metadata.endpoint,
-      toolResource: tool_resource,
+      toolResource: effectiveToolResource,
       mimeType: file.mimetype,
       fileConfig,
       ocrConfigured: appConfig?.ocr != null,

api/server/services/Files/process.spec.js

@@ -1530,6 +1530,37 @@ describe('processAgentFileUpload', () => {
       );
     });
 
+    test('plans extraction with the promoted context resource for auto-routed text uploads', async () => {
+      const { getUploadExtractedTextPlan } = require('@librechat/api');
+      mergeFileConfig.mockReturnValue(makeFileConfig());
+      const storageUpload = jest.fn().mockResolvedValue({
+        filepath: '/uploads/user-123/file-uuid-123__upload.bin',
+        bytes: 128,
+        filename: 'upload.bin',
+        embedded: false,
+      });
+      getStrategyFunctions.mockReturnValue({ handleFileUpload: storageUpload });
+      const req = makeReq({
+        mimetype: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+        ocrConfig: null,
+      });
+      req.body.endpoint = EModelEndpoint.agents;
+
+      await processAgentFileUpload({
+        req,
+        res: mockRes,
+        metadata: {
+          agent_id: 'agent-abc',
+          message_file: 'true',
+          file_id: 'file-uuid-123',
+        },
+      });
+
+      expect(getUploadExtractedTextPlan).toHaveBeenCalledWith(
+        expect.objectContaining({ toolResource: EToolResources.context }),
+      );
+    });
+
     test('resolves llmDeliveryPath from the agent provider config for agent uploads', async () => {
       const { createFile, getAgent } = require('~/models');
       getAgent.mockResolvedValueOnce({ provider: 'Custom Provider' });