fix(docs): AuthManager.extend() → Auth.manager.extend(...) for accuracy (#36)

AuthManager.extend() is an instance method accessed via the facade,
not a static call. Updated docs and skill references to match.

Author: anilcancakir

doc/digging-deeper/logging.md

@@ -236,7 +236,7 @@ class LoggingServiceProvider extends ServiceProvider {
 }
 ```
 
-This follows the same `extend()` pattern as `AuthManager.extend()` for custom auth guards. The factory receives the channel's config map and returns a `LoggerDriver` instance.
+This follows the same `extend()` pattern as `Auth.manager.extend(...)` for custom auth guards. The factory receives the channel's config map and returns a `LoggerDriver` instance.
 
 Then use it in your config:
 

skills/magic-framework/references/secondary-systems.md

@@ -171,7 +171,7 @@ Log.channel('slack').error('Critical server issue');
 
 ### Custom Drivers
 
-Register custom log drivers via `LogManager.extend()` — follows the same pattern as `AuthManager.extend()`:
+Register custom log drivers via `LogManager.extend()` — follows the same pattern as `Auth.manager.extend(...)`:
 
 ```dart
 // In a ServiceProvider boot():