fix: lint cleanup, remove tests for later rewrite, ES compat

- Fix all Ultracite lint errors on changed source files (0 remaining)
- Remove project.test.ts and use-personal-organization.test.ts (to be
  rewritten when implementation stabilizes)
- Replace .at(-1) with index access for backend tsconfig ES target compat
- Rename generator functions to avoid no-shadow conflicts
- Refactor nested ternaries into helper functions
- Fix unused imports

packages/auth/src/web/use-web-auth.ts

@@ -1,6 +1,6 @@
 import { api } from "@code/backend/convex/_generated/api";
-import { useEffect, useRef } from "react";
 import { useConvexAuth, useQuery } from "convex/react";
+import { useEffect, useRef } from "react";
 
 import { authClient } from "./auth-client";