CRITICAL FIX: Inactivity lockout now respects time extensions
- Lockout timer was completely ignoring pause button extensions
- Lockout timer was ignoring manual site timeout extensions
- Added inactivityExtensionUntil check to checkLockoutTimer() function
- Time extensions now properly prevent BOTH site timeout AND lockout
- When extension expires, lockout timer resets (doesn't trigger immediately)
FIXED: Manual sites (duration: 0) now fully support time extensions
- Pause button extensions now work on manual sites
- Manual site timeout extensions now prevent lockout
- Extensions apply to both rotation blocking AND lockout prevention
ROOT CAUSE:
The checkLockoutTimer() function (line 4061) only checked:
- lockoutActivityTime vs lockoutTimeout
- Did NOT check inactivityExtensionUntil
This meant when a user clicked "15 minutes" on pause button:
✓ Site rotation/timeout was blocked (lines 4317, 4375 checked extension)
✗ Inactivity lockout still triggered after configured time
EXAMPLE SCENARIO THAT WAS BROKEN:
- Manual site with 2 min inactivity timeout to return home
- Lockout after 5 minutes of inactivity
- User idle for 1m 50s, clicks "15 minutes" extension
- Expected: Can stay for 15 more minutes
- Actual v0.9.5-6:
* Home return prompt blocked ✓
* Lockout happens at 5 min idle ✗
- Fixed v0.9.5-7:
* Home return prompt blocked ✓
* Lockout also blocked for 15 min ✓
FIX (lines 4083-4100):
Now checkLockoutTimer() checks inactivityExtensionUntil FIRST:
1. If within extension period: return early (skip lockout check)
2. If extension just expired: reset lockoutActivityTime (prevent immediate trigger)
3. Then check normal lockout timeout
This matches the pattern used in rotation (line 4317) and home return (line 4375).
Includes all fixes from v0.9.5-6 (boot password sequence, limited power menu)
