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/Networking/GiteaClient.swift

@@ -250,4 +250,14 @@ struct GiteaClient {
     func rerun(owner: String, repo: String, runID: Int64) async throws {
         try await postNoBody("repos/\(owner)/\(repo)/actions/runs/\(runID)/rerun")
     }
+
+    /// Raw log text for a single job (from `/actions/jobs/{job_id}/logs`).
+    /// The response is plain text, not JSON.
+    func jobLogs(owner: String, repo: String, jobID: Int64) async throws -> String {
+        let data = try await request("repos/\(owner)/\(repo)/actions/jobs/\(jobID)/logs")
+        guard let text = String(data: data, encoding: .utf8) else {
+            throw APIError.invalidResponse
+        }
+        return text
+    }
 }