refactor(db): streamline model imports and remove unused model exports

- Removed the export of models from the database connection module to simplify the structure.
- Updated various files to import models directly from the new centralized models module.
- Ensured consistency across the codebase by replacing mongoose model references with the new import paths.

api/models/Action.js

@@ -1,5 +1,5 @@
 const mongoose = require('mongoose');
-const Action = mongoose.models.Action;
+const Action = require('~/db/models').Action;
 
 /**
  * Update an action with new data without overwriting existing properties,

api/models/Agent.js

@@ -14,7 +14,7 @@ const {
 const getLogStores = require('~/cache/getLogStores');
 const { getActions } = require('./Action');
 
-const Agent = mongoose.models.Agent;
+const Agent = require('~/db/models').Agent;
 
 /**
  * Create an agent with the provided data.

api/models/Agent.spec.js

@@ -21,7 +21,7 @@ const {
   removeAgentResourceFiles,
 } = require('./Agent');
 
-const Agent = mongoose.models.Agent;
+const Agent = require('~/db/models').Agent;
 
 describe('Agent Resource File Operations', () => {
   let mongoServer;

api/models/Assistant.js

@@ -1,5 +1,5 @@
 const mongoose = require('mongoose');
-const Assistant = mongoose.models.Assistant;
+const Assistant = require('~/db/models').Assistant;
 
 /**
  * Update an assistant with new data without overwriting existing properties,

api/models/Banner.js

@@ -1,7 +1,7 @@
 const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 
-const Banner = mongoose.models.Banner;
+const Banner = require('~/db/models').Banner;
 
 /**
  * Retrieves the current active banner.

api/models/Conversation.js

@@ -2,7 +2,7 @@ const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 const { getMessages, deleteMessages } = require('./Message');
 
-const Conversation = mongoose.models.Conversation;
+const Conversation = require('~/db/models').Conversation;
 
 /**
  * Searches for a conversation by conversationId and returns a lean document with only conversationId and user.

api/models/ConversationTag.js

@@ -1,8 +1,8 @@
 const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 
-const ConversationTag = mongoose.models.ConversationTag;
-const Conversation = mongoose.models.Conversation;
+const ConversationTag = require('~/db/models').ConversationTag;
+const Conversation = require('~/db/models').Conversation;
 
 /**
  * Retrieves all conversation tags for a user.

api/models/File.js

@@ -2,7 +2,7 @@ const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 const { EToolResources } = require('librechat-data-provider');
 
-const File = mongoose.models.File;
+const File = require('~/db/models').File;
 
 /**
  * Finds a file by its file_id with additional query options.

api/models/Message.js

@@ -2,7 +2,7 @@ const { z } = require('zod');
 const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 
-const Message = mongoose.models.Message;
+const Message = require('~/db/models').Message;
 const idSchema = z.string().uuid();
 
 /**

api/models/Preset.js

@@ -1,7 +1,7 @@
 const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 
-const Preset = mongoose.models.Preset;
+const Preset = require('~/db/models').Preset;
 
 const getPreset = async (user, presetId) => {
   try {

api/models/Project.js

@@ -1,7 +1,7 @@
 const mongoose = require('mongoose');
 const { GLOBAL_PROJECT_NAME } = require('librechat-data-provider').Constants;
 
-const Project = mongoose.models.Project;
+const Project = require('~/db/models').Project;
 
 /**
  * Retrieve a project by ID and convert the found project document to a plain object.

api/models/Prompt.js

@@ -10,8 +10,8 @@ const {
 } = require('./Project');
 const { escapeRegExp } = require('~/server/utils');
 
-const PromptGroup = mongoose.models.PromptGroup;
-const Prompt = mongoose.models.Prompt;
+const PromptGroup = require('~/db/models').PromptGroup;
+const Prompt = require('~/db/models').Prompt;
 
 /**
  * Create a pipeline for the aggregation to get prompt groups

api/models/Role.js

@@ -10,7 +10,7 @@ const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 const getLogStores = require('~/cache/getLogStores');
 
-const Role = mongoose.models.Role;
+const Role = require('~/db/models').Role;
 
 /**
  * Retrieve a role by name and convert the found role document to a plain object.

api/models/Role.spec.js

@@ -9,7 +9,7 @@ const {
 const { getRoleByName, updateAccessPermissions, initializeRoles } = require('~/models/Role');
 const getLogStores = require('~/cache/getLogStores');
 
-const Role = mongoose.models.Role;
+const Role = require('~/db/models').Role;
 
 // Mock the cache
 jest.mock('~/cache/getLogStores', () =>

api/models/Share.js

@@ -4,8 +4,8 @@ const { Constants } = require('librechat-data-provider');
 const { logger } = require('@librechat/data-schemas');
 const { getMessages } = require('./Message');
 
-const Conversation = mongoose.models.Conversation;
-const SharedLink = mongoose.models.SharedLink;
+const Conversation = require('~/db/models').Conversation;
+const SharedLink = require('~/db/models').SharedLink;
 
 class ShareServiceError extends Error {
   constructor(message, code) {

api/models/Token.js

@@ -1,7 +1,7 @@
 const mongoose = require('mongoose');
 const { encryptV2 } = require('~/server/utils/crypto');
 
-const Token = mongoose.models.Token;
+const Token = require('~/db/models').Token;
 
 /**
  * Handles the OAuth token by creating or updating the token.

api/models/ToolCall.js

@@ -1,6 +1,6 @@
 const mongoose = require('mongoose');
 
-const ToolCall = mongoose.models.ToolCall;
+const ToolCall = require('~/db/models').ToolCall;
 
 /**
  * Create a new tool call

api/models/Transaction.js

@@ -3,8 +3,8 @@ const { logger } = require('@librechat/data-schemas');
 const { getBalanceConfig } = require('~/server/services/Config');
 const { getMultiplier, getCacheMultiplier } = require('./tx');
 
-const Transaction = mongoose.models.Transaction;
-const Balance = mongoose.models.Balance;
+const Transaction = require('~/db/models').Transaction;
+const Balance = require('~/db/models').Balance;
 
 const cancelRate = 1.15;
 

api/models/Transaction.spec.js

@@ -4,7 +4,7 @@ const { spendTokens, spendStructuredTokens } = require('./spendTokens');
 const { getBalanceConfig } = require('~/server/services/Config');
 const { getMultiplier, getCacheMultiplier } = require('./tx');
 const { createTransaction } = require('./Transaction');
-const Balance = mongoose.models.Balance;
+const Balance = require('~/db/models').Balance;
 
 // Mock the custom config module so we can control the balance flag.
 jest.mock('~/server/services/Config');

api/models/balanceMethods.js

@@ -5,7 +5,7 @@ const { createAutoRefillTransaction } = require('./Transaction');
 const { logViolation } = require('~/cache');
 const { getMultiplier } = require('./tx');
 
-const Balance = mongoose.models.Balance;
+const Balance = require('~/db/models').Balance;
 
 function isInvalidDate(date) {
   return isNaN(date);

api/models/convoStructure.spec.js

@@ -2,7 +2,7 @@ const mongoose = require('mongoose');
 const { MongoMemoryServer } = require('mongodb-memory-server');
 const { getMessages, bulkSaveMessages } = require('./Message');
 
-const Message = mongoose.models.Message;
+const Message = require('~/db/models').Message;
 
 // Original version of buildTree function
 function buildTree({ messages, fileMap }) {

api/models/inviteUser.js

@@ -2,7 +2,7 @@ const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 const { getRandomValues, hashToken } = require('~/server/utils/crypto');
 
-const Token = mongoose.models.Token;
+const Token = require('~/db/models').Token;
 
 /**
  * @module inviteUser

api/models/spendTokens.js

@@ -1,5 +1,4 @@
 const { logger } = require('~/config');
-const db = require('db/connect');
 const { createTransaction, createStructuredTransaction } = require('./Transaction');
 /**
  * Creates up to two transactions to record the spending of tokens.

api/models/spendTokens.spec.js

@@ -2,8 +2,8 @@ const mongoose = require('mongoose');
 const { MongoMemoryServer } = require('mongodb-memory-server');
 const { spendTokens, spendStructuredTokens } = require('./spendTokens');
 const { createTransaction, createAutoRefillTransaction } = require('./Transaction');
-const Transaction = mongoose.models.Transaction;
-const Balance = mongoose.models.Balance;
+const Transaction = require('~/db/models').Transaction;
+const Balance = require('~/db/models').Balance;
 
 // Mock the logger to prevent console output during tests
 jest.mock('~/config', () => ({