feat(repo): add avatar helpers

Co-Authored-By: Virgil <virgil@lethean.io>

docs/api-contract.md

@@ -184,6 +184,8 @@ Coverage notes: rows list direct tests when a symbol is named in test names or r
 | method | RepoService.ListUserRepos | `func (s *RepoService) ListUserRepos(ctx context.Context) ([]types.Repository, error)` | ListUserRepos returns all repositories for the authenticated user. | No direct tests. |
 | method | RepoService.MirrorSync | `func (s *RepoService) MirrorSync(ctx context.Context, owner, repo string) error` | MirrorSync triggers a mirror sync. | No direct tests. |
 | method | RepoService.RejectTransfer | `func (s *RepoService) RejectTransfer(ctx context.Context, owner, repo string) error` | RejectTransfer rejects a pending repository transfer. | No direct tests. |
+| method | RepoService.DeleteAvatar | `func (s *RepoService) DeleteAvatar(ctx context.Context, owner, repo string) error` | DeleteAvatar deletes a repository avatar. | `TestRepoService_DeleteAvatar_Good` |
+| method | RepoService.UpdateAvatar | `func (s *RepoService) UpdateAvatar(ctx context.Context, owner, repo string, opts *types.UpdateRepoAvatarOption) error` | UpdateAvatar updates a repository avatar. | `TestRepoService_UpdateAvatar_Good` |
 | method | RepoService.Transfer | `func (s *RepoService) Transfer(ctx context.Context, owner, repo string, opts map[string]any) error` | Transfer initiates a repository transfer. | No direct tests. |
 | method | Resource.Create | `func (r *Resource[T, C, U]) Create(ctx context.Context, params Params, body *C) (*T, error)` | Create creates a new resource. | `TestResource_Good_Create` |
 | method | Resource.Delete | `func (r *Resource[T, C, U]) Delete(ctx context.Context, params Params) error` | Delete removes a resource. | `TestResource_Good_Delete` |

repos.go

@@ -186,6 +186,18 @@ func (s *RepoService) GetNewPinAllowed(ctx context.Context, owner, repo string)
 	return &out, nil
 }
 
+// UpdateAvatar updates a repository avatar.
+func (s *RepoService) UpdateAvatar(ctx context.Context, owner, repo string, opts *types.UpdateRepoAvatarOption) error {
+	path := ResolvePath("/api/v1/repos/{owner}/{repo}/avatar", pathParams("owner", owner, "repo", repo))
+	return s.client.Post(ctx, path, opts, nil)
+}
+
+// DeleteAvatar deletes a repository avatar.
+func (s *RepoService) DeleteAvatar(ctx context.Context, owner, repo string) error {
+	path := ResolvePath("/api/v1/repos/{owner}/{repo}/avatar", pathParams("owner", owner, "repo", repo))
+	return s.client.Delete(ctx, path)
+}
+
 // GetSubscription returns the current user's watch state for a repository.
 func (s *RepoService) GetSubscription(ctx context.Context, owner, repo string) (*types.WatchInfo, error) {
 	path := ResolvePath("/api/v1/repos/{owner}/{repo}/subscription", pathParams("owner", owner, "repo", repo))

repos_test.go

@@ -131,6 +131,55 @@ func TestRepoService_GetNewPinAllowed_Good(t *testing.T) {
 	}
 }
 
+func TestRepoService_UpdateAvatar_Good(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			t.Errorf("expected POST, got %s", r.Method)
+		}
+		if r.URL.Path != "/api/v1/repos/core/go-forge/avatar" {
+			t.Errorf("wrong path: %s", r.URL.Path)
+			http.NotFound(w, r)
+			return
+		}
+		var body types.UpdateRepoAvatarOption
+		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+			t.Fatalf("decode body: %v", err)
+		}
+		if body.Image != "iVBORw0KGgoAAAANSUhEUg==" {
+			t.Fatalf("got image=%q", body.Image)
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer srv.Close()
+
+	f := NewForge(srv.URL, "tok")
+	if err := f.Repos.UpdateAvatar(context.Background(), "core", "go-forge", &types.UpdateRepoAvatarOption{
+		Image: "iVBORw0KGgoAAAANSUhEUg==",
+	}); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestRepoService_DeleteAvatar_Good(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodDelete {
+			t.Errorf("expected DELETE, got %s", r.Method)
+		}
+		if r.URL.Path != "/api/v1/repos/core/go-forge/avatar" {
+			t.Errorf("wrong path: %s", r.URL.Path)
+			http.NotFound(w, r)
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer srv.Close()
+
+	f := NewForge(srv.URL, "tok")
+	if err := f.Repos.DeleteAvatar(context.Background(), "core", "go-forge"); err != nil {
+		t.Fatal(err)
+	}
+}
+
 func TestRepoService_GetSubscription_Good(t *testing.T) {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodGet {