Almost Heaven audit/fix pass completed.

Fixes applied:
- Added robust local temp login fallback via admin/users.txt when external auth users.json is unavailable.
- Restored external auth config path handling to use C:/inetpub/Authentication/almostheaven/auth_config.php.
- Fixed broken relative includes in public subfolder pages (about, djs, friends, news, requests, schedule, top50).
- Started session before header output to stop homepage/admin session warnings.
- Added missing admin/file-finder.php and includes/nowplaying_lib.php from the shared station build.
- Updated header meta/favicons to use /img/logo.png.
- Applied supplied branding image to assets/logo.png, img/logo.png, img/backgrounds/main-bg.png.

Audit notes:
- Local temp login retained.
- External API path remains C:/inetpub/Authentication/api/almostheaven.php.
