Bluetooth improvements, Reports fixes, and UI fixes.

Bluetooth & Connectivity
Wi-Fi join failure — Shows a specific error and steps when a controller can't join Wi-Fi during setup.
Bluetooth pairing expired — App now tells you explicitly when pairing is stale, rather than failing silently.
Timeout extended to 30 seconds — Fewer false timeouts on slower devices or congested RF environments.

Reports
Flow and Electrical reports — Both now display correctly in the Reports tab.