feat(explorer): 채널 후원 목록/등록 기능을 추가한다

SodaLive/Sources/Explorer/Profile/ChannelDonation/GetChannelDonationListResponse.swift

@@ -0,0 +1,73 @@
+//
+//  GetChannelDonationListResponse.swift
+//  SodaLive
+//
+//  Created by klaus on 2/25/26.
+//
+
+import Foundation
+
+struct GetChannelDonationListResponse: Decodable {
+    let totalCount: Int
+    let items: [GetChannelDonationListItem]
+}
+
+struct GetChannelDonationListItem: Decodable {
+    let id: Int
+    let memberId: Int
+    let nickname: String
+    let profileUrl: String
+    let can: Int
+    let isSecret: Bool
+    let message: String
+    let createdAt: String
+}
+
+extension GetChannelDonationListItem {
+    func relativeTimeText(now: Date = Date()) -> String {
+        guard let createdDate = DateParser.parse(createdAt) else {
+            return createdAt
+        }
+
+        let interval = max(0, now.timeIntervalSince(createdDate))
+
+        let calendar = Calendar.current
+        let ym = calendar.dateComponents([.year, .month],
+                                         from: createdDate,
+                                         to: now)
+
+        if let years = ym.year, years >= 1 {
+            return I18n.Time.yearsAgo(years)
+        }
+
+        if let months = ym.month, months >= 1 {
+            return I18n.Time.monthsAgo(months)
+        }
+
+        if interval < 60 {
+            return I18n.Time.justNow
+        }
+
+        if interval < 3600 {
+            let minutes = max(1, Int(interval / 60))
+            return I18n.Time.minutesAgo(minutes)
+        }
+
+        if interval < 86_400 {
+            let hours = max(1, Int(interval / 3600))
+            return I18n.Time.hoursAgo(hours)
+        }
+
+        let days = max(1, Int(interval / 86_400))
+        return I18n.Time.daysAgo(days)
+    }
+
+    var messageBodyText: String {
+        let trimmed = message.trimmingCharacters(in: .whitespacesAndNewlines)
+        if trimmed.isEmpty {
+            return I18n.MemberChannel.channelDonationDefaultMessage
+        }
+
+        return " \(trimmed)"
+    }
+}