Remove widget extension

Delete KisaniCalWidget target, Shared/WidgetDataStore, WidgetBridge,
App Group entitlements, and all syncWidget() calls.

Shared/WidgetDataStore.swift

@@ -1,61 +0,0 @@
-import Foundation
-
-// Shared between app and widget extension via App Group UserDefaults.
-// Types are pure Codable — no UIKit / AppColors dependency.
-
-struct WidgetDataStore {
-    static let suiteName  = "group.com.kutesir.KisaniCal"
-    static let tasksKey   = "kisani.widget.tasks"
-    static let workoutKey = "kisani.widget.workout"
-
-    // MARK: - Shared types
-
-    struct WidgetTask: Codable, Identifiable {
-        let id: UUID
-        let title: String
-        let dueDate: Date?
-        let isToday: Bool
-        let isOverdue: Bool
-    }
-
-    struct WidgetWorkout: Codable {
-        let name: String
-        let sectionsCount: Int
-        let hasWorkoutToday: Bool
-    }
-
-    // MARK: - Write (app target)
-
-    static func saveTasks(_ tasks: [WidgetTask]) {
-        guard let data = try? JSONEncoder().encode(tasks),
-              let ud   = UserDefaults(suiteName: suiteName) else { return }
-        ud.set(data, forKey: tasksKey)
-    }
-
-    static func saveWorkout(_ workout: WidgetWorkout?) {
-        guard let ud = UserDefaults(suiteName: suiteName) else { return }
-        if let workout, let data = try? JSONEncoder().encode(workout) {
-            ud.set(data, forKey: workoutKey)
-        } else {
-            ud.removeObject(forKey: workoutKey)
-        }
-    }
-
-    // MARK: - Read (widget target)
-
-    static func loadTasks() -> [WidgetTask] {
-        guard let ud   = UserDefaults(suiteName: suiteName),
-              let data = ud.data(forKey: tasksKey),
-              let list = try? JSONDecoder().decode([WidgetTask].self, from: data)
-        else { return [] }
-        return list
-    }
-
-    static func loadWorkout() -> WidgetWorkout? {
-        guard let ud      = UserDefaults(suiteName: suiteName),
-              let data    = ud.data(forKey: workoutKey),
-              let workout = try? JSONDecoder().decode(WidgetWorkout.self, from: data)
-        else { return nil }
-        return workout
-    }
-}