initial version

PortfolioJournal/Utilities/AllocationTargetStore.swift

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+import Foundation
+
+enum AllocationTargetStore {
+    private static let targetsKey = "allocationTargets"
+
+    static func target(for categoryId: UUID) -> Double? {
+        loadTargets()[categoryId.uuidString]
+    }
+
+    static func setTarget(_ value: Double?, for categoryId: UUID) {
+        var targets = loadTargets()
+        let key = categoryId.uuidString
+        if let value, value > 0 {
+            targets[key] = value
+        } else {
+            targets.removeValue(forKey: key)
+        }
+        saveTargets(targets)
+    }
+
+    static func totalTargetPercentage(for categoryIds: [UUID]) -> Double {
+        let targets = loadTargets()
+        return categoryIds.reduce(0) { total, id in
+            total + (targets[id.uuidString] ?? 0)
+        }
+    }
+
+    private static func loadTargets() -> [String: Double] {
+        guard let data = UserDefaults.standard.data(forKey: targetsKey),
+              let decoded = try? JSONDecoder().decode([String: Double].self, from: data) else {
+            return [:]
+        }
+        return decoded
+    }
+
+    private static func saveTargets(_ targets: [String: Double]) {
+        if let data = try? JSONEncoder().encode(targets) {
+            UserDefaults.standard.set(data, forKey: targetsKey)
+        }
+    }
+}