fix: delete Topic.swift

QuizApp/Topic.swift

@@ -1,51 +0,0 @@
-//
-//  Topic.swift
-//  QuizApp
-//
-//  Created by Paul on 03.08.25.
-//
-
-import Foundation
-
-struct QuizQuestion: Decodable, Hashable, Identifiable {
-    let id: UUID
-    let question: String
-    let answers: [String]
-    let correctAnswer: Int
-    
-    let type: String?
-    let minValue: Double?
-    let maxValue: Double?
-    let correctValue: Double?
-    let unit: String?
-
-    // Manuelles Decoding, id wird generiert
-    init(from decoder: Decoder) throws {
-        let container = try decoder.container(keyedBy: CodingKeys.self)
-        
-        question = try container.decode(String.self, forKey: .question)
-        
-        // Falls im JSON nicht vorhanden, Standard setzen
-        answers = (try? container.decode([String].self, forKey: .answers)) ?? []
-        correctAnswer = (try? container.decode(Int.self, forKey: .correctAnswer)) ?? 0
-        
-        // Optional
-        type = try container.decodeIfPresent(String.self, forKey: .type)
-        minValue = try container.decodeIfPresent(Double.self, forKey: .minValue)
-        maxValue = try container.decodeIfPresent(Double.self, forKey: .maxValue)
-        correctValue = try container.decodeIfPresent(Double.self, forKey: .correctValue)
-        unit = try container.decodeIfPresent(String.self, forKey: .unit)
-        
-        id = UUID()
-    }
-    
-    private enum CodingKeys: String, CodingKey {
-        case question, answers, correctAnswer
-        case type, minValue, maxValue, correctValue, unit
-    }
-    
-    var isEstimation: Bool {
-        if let t = type?.lowercased() { return t == "estimation" }
-        return !answers.isEmpty ? false : (minValue != nil || maxValue != nil || correctValue != nil)
-    }
-}