OPC # 0001: Gitea services

Co-authored-by: Copilot <copilot@github.com>

clarity.controlplane/src/api/opcApi.ts

@@ -204,6 +204,22 @@ export async function getBranchCoverageForRepo(repoKey: string, hashes: string[]
   return res.json();
 }
 
+// ── Changesets (paginated cross-repo commit log) ───────────────────────────────
+// Reuses LinkedCommit shape — repoKey identifies which repo each commit came from.
+
+export async function getChangesets(
+  page  = 1,
+  limit = 25,
+  repo  = 'all',
+  grep?: string,
+): Promise<LinkedCommit[]> {
+  const params = new URLSearchParams({ page: String(page), limit: String(limit), repo });
+  if (grep) params.set('grep', grep);
+  const res = await fetch(`${BASE_URL}/api/git/log?${params}`);
+  if (!res.ok) throw new Error(`Failed to load changesets: ${res.statusText}`);
+  return res.json();
+}
+
 // ── Commit detail (full diff) ─────────────────────────────────────────────────
 
 export interface CommitFile {
@@ -296,13 +312,15 @@ function mapArtifact(r: any): OpcArtifact {
 // ── Gitea branch integration ───────────────────────────────────────────────────
 
 export interface GiteaBranch {
+  repoKey?:  string;  // present when querying ?repo=all
   name:      string;
   commitSha: string;
   protected: boolean;
 }
 
-export async function listGiteaBranches(): Promise<GiteaBranch[]> {
-  const res = await fetch(`${BASE_URL}/api/gitea/branches`);
+export async function listGiteaBranches(repoKey?: string): Promise<GiteaBranch[]> {
+  const params = repoKey ? `?repo=${encodeURIComponent(repoKey)}` : '';
+  const res = await fetch(`${BASE_URL}/api/gitea/branches${params}`);
   if (!res.ok) throw new Error(`Failed to load Gitea branches: ${res.statusText}`);
   return res.json();
 }