GiteaPR: native iOS app to manage Gitea pull requests

Multi-repo PR inbox, review (approve/request changes/comment), merge with
gating toggle, read-only diff viewer, and Gitea Actions check status with
one-tap re-run. Ships unsigned via the iMac runner to the SideStore source.

GiteaPR/Models/ChangedFile.swift

@@ -0,0 +1,16 @@
+import Foundation
+
+/// One file changed by a PR, from `/repos/{owner}/{repo}/pulls/{index}/files`.
+struct ChangedFile: Codable, Identifiable, Hashable {
+    let filename: String
+    let status: String?         // added | removed | modified | renamed
+    let additions: Int
+    let deletions: Int
+    let patch: String?          // unified diff hunks (only for small diffs)
+
+    var id: String { filename }
+
+    enum CodingKeys: String, CodingKey {
+        case filename, status, additions, deletions, patch
+    }
+}