Fix navigation error from SecuritySettingsScreen to AuthenticationScreen

[Copilot]

This PR resolves a navigation error that occurred when trying to navigate from SecuritySettingsScreen to AuthenticationScreen. The error was:

java.lang.IllegalArgumentException: Destination with route Authentication cannot be found in navigation graph ComposeNavGraph(0x4f85e0ca) route=com.sorrowblue.comicviewer.feature.settings.navigation.SettingsDetailNavGraph

Root Cause

The issue was caused by a navigation scope mismatch in the dependency injection setup:

1. SecuritySettings resides in SettingsDetailNavGraph
2. Authentication was defined in the parent SettingsNavGraph
3. When SecuritySettingsScreen tried to navigate to Authentication, it used a NavController scoped to SettingsDetailNavGraph
4. This NavController couldn't find the Authentication destination because it was in a different navigation scope

Solution

Moved the Authentication destination from SettingsNavGraph to SettingsDetailNavGraph where SecuritySettings resides. This ensures that:

• The NavController scoped to SettingsDetailNavGraph can navigate to Authentication
• SecuritySettingsScreen can successfully navigate to all authentication flows (Register, Erase, Change)
• The navigation architecture remains clean and logical

Changes

• SettingsDetailNavGraph.kt: Added Authentication as a destination and updated SettingsDetailNavGraphNavigator to handle authentication navigation directly
• SettingsNavGraph.kt: Removed Authentication destination to avoid duplication

The changes are minimal and focused, maintaining the existing architecture while fixing the navigation scope issue.

Fixes #861.

Warning

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