Add data-driven dynamic question mode

scripts/ui/main.gd

@@ -248,6 +248,12 @@ func _build_ui() -> void:
 	screens_container.add_child(selector)
 	screens["selection"] = selector
 
+	var dynamic_questions := preload("res://scripts/ui/dynamic_questions_screen.gd").new()
+	dynamic_questions.name = "DynamicQuestionsScreen"
+	dynamic_questions.main = self
+	screens_container.add_child(dynamic_questions)
+	screens["dynamic_questions"] = dynamic_questions
+
 	var map := preload("res://scripts/ui/study_map.gd").new()
 	map.name = "StudyMap"
 	map.main = self
@@ -410,6 +416,7 @@ func _populate_navigation(container: VBoxContainer, include_brand: bool) -> void
 
 	_add_nav_button(container, "home", "Dashboard", "chart-no-axes-column-increasing", true)
 	_add_nav_button(container, "question_bank", "Question Bank", "clipboard-list", true)
+	_add_nav_button(container, "dynamic_questions", "Dynamic Questions", "shuffle", true)
 	_add_nav_button(container, "ccs", "CCS Cases", "stethoscope", true)
 	_add_nav_button(container, "exams", "Exam Simulations", "clipboard-list", true)
 	_add_nav_button(container, "flashcards", "Flashcards", "clipboard-plus", true)
@@ -454,6 +461,7 @@ func _on_navigation_pressed(key: String) -> void:
 	match key:
 		"home": show_screen("dashboard")
 		"question_bank": show_screen("selection", "question_bank")
+		"dynamic_questions": show_screen("dynamic_questions")
 		"exams": show_screen("simulation_history")
 		"ccs": show_screen("ccs_hub")
 		"flashcards": show_screen("flashcards_study")
@@ -472,6 +480,7 @@ func _update_header_title(screen_name: String) -> void:
 	var titles := {
 		"dashboard": "Dashboard",
 		"selection": "Question Bank",
+		"dynamic_questions": "Dynamic Questions",
 		"simulation_history": "Exam Simulations",
 		"ccs_hub": "CCS Cases",
 		"flashcards_hub": "Flashcards",