feat(api): read zone records without template + snapshot-to-template

LoadDomain requires a template, so a zone without one could never be
viewed or snapshotted. Adds a template-free path: store.LoadZone /
service.ZoneRef / DomainService.ZoneRecords read a zone's live records
straight from the provider (no diff, no template). GET
/domains/{did}/records exposes read-only viewing; POST
/domains/{did}/template-from-zone snapshots only managed record types
(NS/SOA excluded) into a new template and auto-attaches it to the domain.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BwxdSt4reTm7Dj1oxRvpP3

internal/store/loader.go

@@ -33,6 +33,18 @@ func (s *Store) LoadDomain(ctx context.Context, projectID, domainID uuid.UUID) (
 	}, nil
 }
 
+// LoadZone returns just the provider-access half of a domain (provider name,
+// encrypted secret, zone id), WITHOUT requiring an attached template — so a
+// zone's live records can be read for viewing/snapshot even when no template
+// is set. Scoped by projectID (same IDOR closure as LoadDomain).
+func (s *Store) LoadZone(ctx context.Context, projectID, domainID uuid.UUID) (service.ZoneRef, error) {
+	row, err := s.q.LoadDomainFull(ctx, db.LoadDomainFullParams{ID: domainID, ProjectID: projectID})
+	if err != nil {
+		return service.ZoneRef{}, err
+	}
+	return service.ZoneRef{ZoneID: row.ZoneID, Provider: row.Provider, SecretEnc: row.SecretEnc}, nil
+}
+
 // SaveCheckRun persists a summary of the changeset (counts of updates/prunes)
 // as a check_runs row.
 func (s *Store) SaveCheckRun(ctx context.Context, domainID uuid.UUID, cs diff.Changeset) error {

internal/store/loader_test.go

@@ -91,3 +91,35 @@ func TestLoadDomainNoTemplate(t *testing.T) {
 		t.Fatal("expected error for domain without template, got nil")
 	}
 }
+
+// TestLoadZoneNoTemplate covers the Task 1 gap: a domain with no attached
+// template must still be resolvable to its provider-access ref (ZoneRef) so
+// its live records can be read/snapshotted — unlike LoadDomain, LoadZone
+// must NOT error out on a nil template doc.
+func TestLoadZoneNoTemplate(t *testing.T) {
+	s, ctx := newStore(t)
+
+	acc, err := s.Queries().CreateAccount(ctx, db.CreateAccountParams{
+		ID: uuid.New(), ProjectID: defaultProject,
+		Provider: "selectel", SecretEnc: "enc-blob", Comment: "prod",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	domain, err := s.Queries().CreateDomain(ctx, db.CreateDomainParams{
+		ID: uuid.New(), ProjectID: defaultProject, ProviderAccountID: acc.ID,
+		ZoneName: "example.com", ZoneID: "zone-3", TemplateID: nil,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ref, err := s.LoadZone(ctx, defaultProject, domain.ID)
+	if err != nil {
+		t.Fatalf("expected LoadZone to succeed without a template, got error: %v", err)
+	}
+	if ref.ZoneID != "zone-3" || ref.Provider != "selectel" || ref.SecretEnc != "enc-blob" {
+		t.Fatalf("zone ref mismatch: %+v", ref)
+	}
+}