🧹 [Refactoring] Extract generic system preferences opener

[hatimhtm]

🎯 What:
Extracted openAccessibilityPreferences() and openAutomationPreferences() into a single generic function openSystemPreferences(pane: String) in AppDelegate.swift. Updated Click2MinimizeApp views and promptForAccessibilityPermission to use the new generic function.

💡 Why:
This refactoring replaces two structurally identical functions that only differed by a hardcoded pane string with a single parameterized function. This eliminates duplication, reduces boilerplate, and makes it easier to add links to other system preferences panes in the future, thus improving code health and maintainability.

✅ Verification:
I verified the changes by inspecting the resulting AppDelegate.swift to ensure string interpolation matches the original URL exactly. I also ran the automated build test (./test_build_dmg.sh), which successfully completed, confirming no compilation errors were introduced. Furthermore, I requested an automated code review which rated the changes as #Correct#.

✨ Result:
The codebase is cleaner, smaller, and easier to extend, completely fulfilling the code health improvement request.

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PR created automatically by Jules for task 9702817121355957836 started by @hatimhtm

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