[#578] TodayView에 TCA를 적용한다 (#606)

* feat: Store 1차 구현

* refactor: 헬퍼 메서드를 피쳐 쪽으로 이동

* refactor: 불필요 리듀서 분리 수정

* refactor: 코디네이터에서 캐싱하는 Store들은 Bindable 처리

* refactor: 불필요 컴포넌트화 제거

* refactor: Picker에 BindingAction 처리

* refactor: Toggle에 BindingAction 처리

* refactor: BindingAction으로 인한 기존 액션 제거

* refactor: now 시점을 최대한 상위 위치로 옮겨 시간을 일차화

Author: opficdev

Application/DevLogCore/Sources/TodayDisplayOptions.swift

@@ -21,6 +21,10 @@ public struct TodayDisplayOptions: Equatable {
 
     public var dueDateVisibility: DueDateVisibility
     public var focusVisibility: FocusVisibility
+    public var isFocusedOnly: Bool {
+        get { focusVisibility == .focusedOnly }
+        set { focusVisibility = newValue ? .focusedOnly : .all }
+    }
 
     public init(
         dueDateVisibility: DueDateVisibility,

Application/DevLogPresentation/Sources/PushNotification/PushNotificationListView.swift

@@ -15,16 +15,17 @@ struct PushNotificationListView: View {
     @ScaledMetric(relativeTo: .largeTitle) private var labelWidth = 34
     @State private var headerOffset: CGFloat = 0
     @State private var isScrollTrackingEnabled = false
-    @State private var store: StoreOf<PushNotificationListFeature>
+    @Bindable var store: StoreOf<PushNotificationListFeature>
     let coordinator: PushNotificationListViewCoordinator
     let isCompactLayout: Bool
+
     init(
         coordinator: PushNotificationListViewCoordinator,
         isCompactLayout: Bool
     ) {
         self.coordinator = coordinator
         self.isCompactLayout = isCompactLayout
-        self._store = State(initialValue: coordinator.store)
+        self.store = coordinator.store
     }
 
     var body: some View {

Application/DevLogPresentation/Sources/Today/TodayFeature+State.swift

@@ -0,0 +1,129 @@
+//
+//  TodayFeature+State.swift
+//  DevLogPresentation
+//
+//  Created by opfic on 6/14/26.
+//
+
+import DevLogCore
+import Foundation
+
+extension TodayFeature {
+    static func summaryValue(
+        for scope: SectionScope,
+        todos: [TodayTodoItem],
+        displayOptions: TodayDisplayOptions,
+        now: Date
+    ) -> Int {
+        let displayedTodos = displayedTodos(
+            todos: todos,
+            displayOptions: displayOptions
+        )
+
+        switch scope {
+        case .all:
+            return displayedTodos.count
+        case .focused:
+            return displayedTodos.filter(\.isPinned).count
+        case .overdue:
+            return displayedTodos.filter { isOverdue($0, now: now) }.count
+        case .dueSoon:
+            return displayedTodos.filter { isDueSoon($0, now: now) }.count
+        }
+    }
+
+    static func displayedTodos(
+        todos: [TodayTodoItem],
+        displayOptions: TodayDisplayOptions
+    ) -> [TodayTodoItem] {
+        let dueDateFilteredTodos: [TodayTodoItem]
+        switch displayOptions.dueDateVisibility {
+        case .all:
+            dueDateFilteredTodos = todos
+        case .withDueDateOnly:
+            dueDateFilteredTodos = todos.filter { $0.dueDate != nil }
+        case .withoutDueDateOnly:
+            dueDateFilteredTodos = todos.filter { $0.dueDate == nil }
+        }
+
+        switch displayOptions.focusVisibility {
+        case .all:
+            return dueDateFilteredTodos
+        case .focusedOnly:
+            return dueDateFilteredTodos.filter(\.isPinned)
+        }
+    }
+
+    static func groupedSectionItems(
+        from items: [TodayTodoItem],
+        now: Date
+    ) -> TodayFeature.SectionCollection {
+        let calendar = Calendar.current
+        let startOfToday = calendar.startOfDay(for: now)
+        guard let windowEnd = calendar.date(
+            byAdding: .day,
+            value: TodayFeature.upcomingWindowDays,
+            to: startOfToday
+        ) else {
+            return TodayFeature.SectionCollection(
+                focused: items.filter(\.isPinned),
+                unscheduled: items.filter { !$0.isPinned && $0.dueDate == nil }
+            )
+        }
+
+        var collection = TodayFeature.SectionCollection()
+
+        for item in items {
+            if item.isPinned {
+                collection.focused.append(item)
+                continue
+            }
+
+            guard let dueDate = item.dueDate else {
+                collection.unscheduled.append(item)
+                continue
+            }
+
+            let dueDay = calendar.startOfDay(for: dueDate)
+            if dueDay < startOfToday {
+                collection.overdue.append(item)
+            } else if dueDay <= windowEnd {
+                collection.dueSoon.append(item)
+            } else {
+                collection.later.append(item)
+            }
+        }
+
+        return collection
+    }
+
+    static func isOverdue(_ item: TodayTodoItem, now: Date) -> Bool {
+        guard let dueDate = item.dueDate else { return false }
+        let calendar = Calendar.current
+        return calendar.startOfDay(for: dueDate) < calendar.startOfDay(for: now)
+    }
+
+    static func isDueSoon(_ item: TodayTodoItem, now: Date) -> Bool {
+        guard let dueDate = item.dueDate else { return false }
+        let calendar = Calendar.current
+        let startOfToday = calendar.startOfDay(for: now)
+        guard let windowEnd = calendar.date(
+            byAdding: .day,
+            value: TodayFeature.upcomingWindowDays,
+            to: startOfToday
+        ) else {
+            return false
+        }
+        let dueDay = calendar.startOfDay(for: dueDate)
+        return startOfToday <= dueDay && dueDay <= windowEnd
+    }
+
+    static func makeSection(
+        category: SectionCategory,
+        title: String,
+        items: [TodayTodoItem]
+    ) -> [SectionContent] {
+        guard !items.isEmpty else { return [] }
+        return [SectionContent(category: category, title: title, items: items)]
+    }
+}