feat(apply): per-record selection + deletes-before-updates ordering

RecordDiff.Key() gives a stable normalized identifier ("TYPE name.") for
every diff kind, exposed as recordView.Key. ApplyRequest now takes
Updates/Prunes key lists instead of two booleans, so callers can apply a
subset of records. service.Apply builds the applied set with selected
prunes (Delete) added before selected updates (Add/Update) — an
invariant, not an option — since the provider rejects an Add/Update
whose name still conflicts with an existing record (e.g. a CNAME cannot
be created while an A on the same name still exists).

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

internal/api/api_test.go

@@ -84,12 +84,15 @@ func TestCheckEndpoint(t *testing.T) {
 	}
 }
 
-func TestApplyDefaultsPruneFalse(t *testing.T) {
+// TestApplySendsSelectedKeys covers the per-record selection request shape:
+// POST /apply with only "prunes" set must reach the service with that key in
+// Prunes and an empty Updates.
+func TestApplySendsSelectedKeys(t *testing.T) {
 	a, m := newTestAPI()
 	router := NewRouter(a)
 
 	did := uuid.New().String()
-	body := `{"applyUpdates":true}` // applyPrunes отсутствует → false
+	body := `{"prunes":["A gitlocator.com."]}`
 	req := requestWithSessionCookie(http.MethodPost,
 		"/api/v1/projects/00000000-0000-0000-0000-000000000002/domains/"+did+"/apply",
 		strings.NewReader(body))
@@ -99,7 +102,7 @@ func TestApplyDefaultsPruneFalse(t *testing.T) {
 	if w.Code != http.StatusOK {
 		t.Fatalf("status %d body %s", w.Code, w.Body.String())
 	}
-	if m.lastReq.ApplyPrunes != false || m.lastReq.ApplyUpdates != true {
+	if len(m.lastReq.Prunes) != 1 || m.lastReq.Prunes[0] != "A gitlocator.com." || len(m.lastReq.Updates) != 0 {
 		t.Fatalf("apply request mismatch: %+v", m.lastReq)
 	}
 }
@@ -117,8 +120,8 @@ func TestApplyEmptyBodyOK(t *testing.T) {
 	if w.Code != http.StatusOK {
 		t.Fatalf("status %d body %s", w.Code, w.Body.String())
 	}
-	if m.lastReq.ApplyPrunes != false {
-		t.Fatalf("expected ApplyPrunes=false for empty body, got %+v", m.lastReq)
+	if len(m.lastReq.Updates) != 0 || len(m.lastReq.Prunes) != 0 {
+		t.Fatalf("expected empty Updates/Prunes for empty body, got %+v", m.lastReq)
 	}
 }
 
@@ -127,7 +130,7 @@ func TestApplyMalformedBody(t *testing.T) {
 	router := NewRouter(a)
 
 	did := uuid.New().String()
-	body := `{"applyUpdates":`
+	body := `{"updates":`
 	req := requestWithSessionCookie(http.MethodPost,
 		"/api/v1/projects/00000000-0000-0000-0000-000000000002/domains/"+did+"/apply",
 		strings.NewReader(body))

internal/api/dto.go

@@ -40,11 +40,12 @@ func toAuthResponse(u store.User, p store.Project) authResponse {
 }
 
 type applyRequest struct {
-	ApplyUpdates bool `json:"applyUpdates"`
-	ApplyPrunes  bool `json:"applyPrunes"`
+	Updates []string `json:"updates"`
+	Prunes  []string `json:"prunes"`
 }
 
 type recordView struct {
+	Key      string   `json:"key"`
 	Kind     string   `json:"kind"`
 	Type     string   `json:"type"`
 	Name     string   `json:"name"`
@@ -61,7 +62,7 @@ type changesetResponse struct {
 }
 
 func toRecordView(d diff.RecordDiff) recordView {
-	rv := recordView{Kind: string(d.Kind), Type: string(d.Type), Name: d.Name, ReadOnly: d.ReadOnly}
+	rv := recordView{Key: d.Key(), Kind: string(d.Kind), Type: string(d.Type), Name: d.Name, ReadOnly: d.ReadOnly}
 	if d.Desired != nil {
 		rv.Desired = d.Desired.Values
 	}

internal/api/handlers.go

@@ -66,15 +66,16 @@ func (a *API) handleApply(w http.ResponseWriter, r *http.Request) {
 	var req applyRequest
 	if r.Body != nil {
 		r.Body = http.MaxBytesReader(w, r.Body, 1<<20) // 1 MiB
-		// пустое тело допустимо → значения по умолчанию (prune=false);
-		// любая другая ошибка decode (битый JSON, неверные типы) → 400
+		// пустое тело допустимо → значения по умолчанию (пустые списки, ничего
+		// не применяется); любая другая ошибка decode (битый JSON, неверные
+		// типы) → 400
 		if err := json.NewDecoder(r.Body).Decode(&req); err != nil && !errors.Is(err, io.EOF) {
 			writeErr(w, http.StatusBadRequest, "invalid request body")
 			return
 		}
 	}
 	cs, err := a.Svc.Apply(r.Context(), pid, did, service.ApplyRequest{
-		ApplyUpdates: req.ApplyUpdates, ApplyPrunes: req.ApplyPrunes,
+		Updates: req.Updates, Prunes: req.Prunes,
 	})
 	if err != nil {
 		log.Printf("api: apply failed: %v", err)