🐞 fix: Agent "Resend" Message Attachments + Source Icon Styling (#6408)

* style: Update text file source icon background color for improved visibility in light mode

* style: Update `vectordb` source icon background color for better visibility

* fix: resend files behavior for tool resource message attachments (code interpreter and file search); Rename `getToolFiles` to `getConvoFiles` and simplify file retrieval logic; add `getToolFilesByIds` for fetching tool files by IDs

api/models/File.js

@@ -1,5 +1,6 @@
 const mongoose = require('mongoose');
 const { fileSchema } = require('@librechat/data-schemas');
+const { logger } = require('~/config');
 
 const File = mongoose.model('File', fileSchema);
 
@@ -26,6 +27,32 @@ const getFiles = async (filter, _sortOptions, selectFields = { text: 0 }) => {
   return await File.find(filter).select(selectFields).sort(sortOptions).lean();
 };
 
+/**
+ * Retrieves tool files (files that are embedded or have a fileIdentifier) from an array of file IDs
+ * @param {string[]} fileIds - Array of file_id strings to search for
+ * @returns {Promise<Array<IMongoFile>>} Files that match the criteria
+ */
+const getToolFilesByIds = async (fileIds) => {
+  if (!fileIds || !fileIds.length) {
+    return [];
+  }
+
+  try {
+    const filter = {
+      file_id: { $in: fileIds },
+      $or: [{ embedded: true }, { 'metadata.fileIdentifier': { $exists: true } }],
+    };
+
+    const selectFields = { text: 0 };
+    const sortOptions = { updatedAt: -1 };
+
+    return await getFiles(filter, sortOptions, selectFields);
+  } catch (error) {
+    logger.error('[getToolFilesByIds] Error retrieving tool files:', error);
+    throw new Error('Error retrieving tool files');
+  }
+};
+
 /**
  * Creates a new file with a TTL of 1 hour.
  * @param {IMongoFile} data - The file data to be created, must contain file_id.
@@ -111,6 +138,7 @@ module.exports = {
   File,
   findFileById,
   getFiles,
+  getToolFilesByIds,
   createFile,
   updateFile,
   updateFileUsage,