Fix commits tab + add CI job logs; bump to 1.7

Commits tab was empty: Gitea PR commits have no 'id' field (only sha), but
PRCommit.id was a non-optional let decoded from 'id', so decoding [PRCommit]
always threw and the tab silently showed nothing. Make PRCommit.id a computed
sha-based identity so the array decodes and renders.

CI: add a Logs button per job that fetches the job's raw log text
(/actions/jobs/{id}/logs) into a viewable, shareable screen. Bump to 1.7.

GiteaPR/Models/PullRequest.swift

@@ -82,22 +82,24 @@ struct IssueComment: Codable, Identifiable {
 }
 
 /// A commit in a pull request.
-struct PRCommit: Codable, Identifiable {
-    struct Meta: Codable {
+struct PRCommit: Codable, Hashable, Identifiable {
+    struct Meta: Codable, Hashable {
         let sha: String?
         let message: String?
     }
-    struct Author: Codable {
+    struct Author: Codable, Hashable {
         let name: String?
         let email: String?
         let login: String?
     }
-    let id: String            // sha
     let sha: String?
     let commit: Meta?
     let author: Author?
+    /// Gitea's PR commits have no `id` field — only `sha`. Use sha as the
+    /// identity so the array decodes and SwiftUI can key rows on it.
+    var id: String { sha ?? commit?.sha ?? "\(author?.name ?? "")-\(commit?.message?.hashValue ?? 0)" }
 
     enum CodingKeys: String, CodingKey {
-        case id, sha, commit, author
+        case sha, commit, author
     }
 }