♻️ refactor: Logout UX, Improved State Teardown, & Remove Unused Code (#5292)

* refactor: SearchBar and Nav components to streamline search functionality and improve state management

* refactor: remove refresh conversations

* chore: update useNewConvo calls to remove hardcoded default index

* refactor: null check for submission in useSSE hook

* refactor: remove useConversation hook and update useSearch to utilize useNewConvo

* refactor: remove conversation and banner store files; consolidate state management into misc; improve typing of families and add messagesSiblingIdxFamily

* refactor: more effectively clear all user/convo state without side effects on logout/delete user

* refactor: replace useParams with useLocation in SearchBar to correctly load conversation

* refactor: update SearchButtons to use button element and improve conversation ID handling

* refactor: use named function for `newConversation` for better call stack tracing

* refactor: enhance TermsAndConditionsModal to support array content and improve type definitions for terms of service

* refactor: add SetConvoProvider and message invalidation when navigating from search results to prevent initial route rendering edge cases

* refactor: rename getLocalStorageItems to localStorage and update imports for consistency

* refactor: move clearLocalStorage function to utils and simplify localStorage clearing logic

* refactor: migrate authentication mutations to a dedicated Auth data provider and update related tests

client/src/Providers/SetConvoContext.tsx

@@ -0,0 +1,14 @@
+import { createContext, useContext, useRef } from 'react';
+import type { MutableRefObject } from 'react';
+
+type SetConvoContext = MutableRefObject<boolean>;
+
+export const SetConvoContext = createContext<SetConvoContext>({} as SetConvoContext);
+
+export const SetConvoProvider = ({ children }: { children: React.ReactNode }) => {
+  const hasSetConversation = useRef<boolean>(false);
+
+  return <SetConvoContext.Provider value={hasSetConversation}>{children}</SetConvoContext.Provider>;
+};
+
+export const useSetConvoContext = () => useContext(SetConvoContext);

client/src/Providers/index.ts

@@ -18,3 +18,4 @@ export * from './AnnouncerContext';
 export * from './AgentsMapContext';
 export * from './CodeBlockContext';
 export * from './ToolCallsMapContext';
+export * from './SetConvoContext';