feat: Final hybrid login implementation (FlareSolverr + Cookie persistence)

- epic-claimer-new.js: Complete rewrite with practical approach
  - FlareSolverr integration for Cloudflare solving
  - Cookie persistence (saved to epic-cookies.json)
  - Auto-load cookies on startup (no login needed if valid)
  - Manual login fallback via noVNC if needed
  - Proper 2FA/OTP support
  - Better error handling and logging

- SETUP.md: Complete setup guide
  - Docker Compose examples
  - Environment variable reference
  - Troubleshooting section
  - 2FA setup instructions
  - Volume backup/restore

- README.md: Add reference to SETUP.md

- OAUTH_DEVICE_FLOW_ISSUE.md: Document why OAuth Device Flow doesn't work
  - Epic Games doesn't provide public device auth credentials
  - Client credentials flow requires registered app
  - Hybrid approach is the practical solution

How it works:
1. First run: Login via browser (FlareSolverr helps with Cloudflare)
2. Cookies saved to epic-cookies.json
3. Subsequent runs: Load cookies, no login needed
4. If cookies expire: Auto-fallback to login flow
5. Manual login via noVNC if automation fails

This is the approach used by all successful Epic Games claimer projects.

README.md

@@ -103,6 +103,14 @@ Persistence & Outputs
 
 Tip: For captchas or first-time login, run with `SHOW=1` and log in once; cookies stay in the profile. Notifications via `NOTIFY` help surface errors (e.g., captcha, login).
 
+---
+
+## 📖 Complete Setup Guide
+
+For detailed setup instructions, see **[SETUP.md](SETUP.md)**.
+
+---
+
 ## Troubleshooting
 
 ### Cloudflare / "Incorrect response" Error (Epic Games)