Urgent React/Firebase Developer — Fix Auth & Build Spark History Page (Worksparks App)

We have a live AI coaching web app (app.worksparks.com) built on React 19 + Vite + Firebase. Three immediate tasks for an experienced React/Firebase developer: Task 1 — Fix production environment variables Live site throws auth/invalid-api-key. Local .env is correct. Need Firebase config env vars properly set for Firebase Hosting (likely via .env.production or Firebase environment config). Task 2 — Fix login redirect Login.jsx line 49 has navigate("/dashboard") but live site routes to /home instead. Confirm redirect works after Task 1 is resolved. Task 3 — Build Spark History page (/history) Display past sessions from Firestore conversations collection. Show: date, session duration, first user message, and spark message (type="spark"). Match existing dark navy design system (#0f1419, teal/gold accents). GitHub access provided. Full brief and Firestore schema supplied on hire. Skills needed: React, Firebase (Auth, Firestore, Hosting), React Router v7, Vite Timeline: One days max Budget: $200 fixed