fix: Enhance Test Coverage and Fix Compatibility Issues 👷‍♂️ (#1363)

* refactor: only remove conversation states from localStorage on login/logout but not on refresh

* chore: add debugging log for azure completion url

* chore: add api-key to redact regex

* fix: do not show endpoint selector if endpoint is falsy

* chore: remove logger from genAzureChatCompletion

* feat(ci): mock fetchEventSource

* refactor(ci): mock all model methods in BaseClient.test, as well as mock the implementation for getCompletion in FakeClient

* fix(OpenAIClient): consider chatCompletion if model name includes `gpt` as opposed to `gpt-`

* fix(ChatGPTClient/azureOpenAI): Remove 'model' option for Azure compatibility (cannot be sent in payload body)

* feat(ci): write new test suite that significantly increase test coverage for OpenAIClient and BaseClient by covering most of the real implementation of the `sendMessage` method
- test for the azure edge case where model option is appended to modelOptions, ensuring removal before sent to the azure endpoint
- test for expected azure url being passed to SSE POST request
- test for AZURE_OPENAI_DEFAULT_MODEL being set, but is not included in the URL deployment name as expected
- test getCompletion method to have correct payload
fix(ci/OpenAIClient.test.js): correctly mock hanging/async methods

* refactor(addTitle): allow azure to title as it aborts signal on completion

api/app/clients/specs/BaseClient.test.js

@@ -1,19 +1,33 @@
 const { initializeFakeClient } = require('./FakeClient');
 
 jest.mock('../../../lib/db/connectDb');
-jest.mock('../../../models', () => {
-  return function () {
-    return {
-      save: jest.fn(),
-      deleteConvos: jest.fn(),
-      getConvo: jest.fn(),
-      getMessages: jest.fn(),
-      saveMessage: jest.fn(),
-      updateMessage: jest.fn(),
-      saveConvo: jest.fn(),
-    };
-  };
-});
+jest.mock('~/models', () => ({
+  User: jest.fn(),
+  Key: jest.fn(),
+  Session: jest.fn(),
+  Balance: jest.fn(),
+  Transaction: jest.fn(),
+  getMessages: jest.fn().mockResolvedValue([]),
+  saveMessage: jest.fn(),
+  updateMessage: jest.fn(),
+  deleteMessagesSince: jest.fn(),
+  deleteMessages: jest.fn(),
+  getConvoTitle: jest.fn(),
+  getConvo: jest.fn(),
+  saveConvo: jest.fn(),
+  deleteConvos: jest.fn(),
+  getPreset: jest.fn(),
+  getPresets: jest.fn(),
+  savePreset: jest.fn(),
+  deletePresets: jest.fn(),
+  findFileById: jest.fn(),
+  createFile: jest.fn(),
+  updateFile: jest.fn(),
+  deleteFile: jest.fn(),
+  deleteFiles: jest.fn(),
+  getFiles: jest.fn(),
+  updateFileUsage: jest.fn(),
+}));
 
 jest.mock('langchain/chat_models/openai', () => {
   return {