Yattee v2 rewrite

Yattee/Models/TranslationContributor.swift

@@ -0,0 +1,45 @@
+//
+//  TranslationContributor.swift
+//  Yattee
+//
+//  Data model for Weblate translation contributor information.
+//
+
+import Foundation
+
+/// An aggregated translation contributor from Weblate.
+struct TranslationContributor: Identifiable, Sendable {
+    let gravatarHash: String
+    let username: String
+    let fullName: String
+    /// Per-language contribution counts
+    let languageContributions: [String: Int]
+
+    var id: String { gravatarHash }
+
+    var totalContributions: Int {
+        languageContributions.values.reduce(0, +)
+    }
+
+    var displayName: String {
+        fullName.isEmpty ? username : fullName
+    }
+
+    var gravatarURL: URL? {
+        URL(string: "https://www.gravatar.com/avatar/\(gravatarHash)?d=identicon&s=200")
+    }
+
+    /// Returns top languages with counts formatted as "Polish (530), German (355), ..."
+    func languageSummary(maxLanguages: Int = 3) -> String {
+        let sorted = languageContributions
+            .sorted { $0.value > $1.value }
+            .prefix(maxLanguages)
+            .map { "\($0.key) (\($0.value))" }
+
+        var result = sorted.joined(separator: ", ")
+        if languageContributions.count > maxLanguages {
+            result += ", ..."
+        }
+        return result
+    }
+}