refactor(db): port service clone/move ops to sqlc (#76)

Tranche 2: cloneServiceRow's INSERT...SELECT (volumes and traefik_labels
now read straight from the source row — traefik_labels was silently
dropped before, and the jsonb param round-trip goes away), domain and
variable copies, name-conflict counts, move UPDATE, project owner check.
Also fixes serviceWriteAccess: user_id is a context string, not a
uuid.UUID — the tranche-1 cast silently failed owner checks for
non-admins. Live tests cover the domain invariants and a full clone
round-trip (config, domains, variables).

Generated with [Devin](https://devin.ai)

Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/backend/internal/api/domains_test.go

@@ -143,3 +143,83 @@ func TestServiceDomainsLiveInvariants(t *testing.T) {
 		t.Fatalf("legacy after delete = %q, want %q", legacy, d1.Domain)
 	}
 }
+
+// Live clone test: cloneServiceRow must copy config, domains, and variables
+// verbatim, start stopped, and land in the target project/environment.
+func TestCloneServiceRowLive(t *testing.T) {
+	dsn := testDSNString(t)
+	db, err := database.NewConnection(dsn)
+	if err != nil {
+		t.Fatalf("connect: %v", err)
+	}
+	defer db.Close()
+	ctx := context.Background()
+	q := sqlcdb.New(db.DB)
+
+	userID := uuid.New()
+	projectID := uuid.New()
+	envID := uuid.New()
+	serviceID := uuid.New()
+	suffix := strings.ReplaceAll(serviceID.String()[:8], "-", "")
+	must := func(err error) {
+		t.Helper()
+		if err != nil {
+			t.Fatalf("setup: %v", err)
+		}
+	}
+	_, err = db.Exec(`INSERT INTO users (id, email, password_hash, name) VALUES ($1, $2, 'x', 'test')`,
+		userID, "clone-"+suffix+"@test.local")
+	must(err)
+	_, err = db.Exec(`INSERT INTO projects (id, name, owner_id, is_approved) VALUES ($1, $2, $3, true)`,
+		projectID, "clone-"+suffix, userID)
+	must(err)
+	_, err = db.Exec(`INSERT INTO environments (id, name, project_id) VALUES ($1, 'production', $2)`,
+		envID, projectID)
+	must(err)
+	_, err = db.Exec(`INSERT INTO services (id, name, project_id, environment_id, service_type, source_type,
+		image_name, port, volumes, traefik_labels, maintenance_mode)
+		VALUES ($1, $2, $3, $4, 'web', 'image', 'traefik/whoami:latest', 80,
+			'[{"mount":"/data"}]'::jsonb,
+			'{"middlewares.rl.ratelimit.average":"100"}'::jsonb, true)`,
+		serviceID, "clonesrc-"+suffix, projectID, envID)
+	must(err)
+	defer func() { _, _ = db.Exec(`DELETE FROM users WHERE id = $1`, userID) }()
+
+	if _, err := q.CreateServiceDomain(ctx, sqlcdb.CreateServiceDomainParams{
+		ServiceID: serviceID, Domain: "src-" + suffix + ".example.com", IsDefault: true}); err != nil {
+		t.Fatalf("seed domain: %v", err)
+	}
+	if _, err := db.Exec(`INSERT INTO environment_variables (id, service_id, key, value, is_secret)
+		VALUES ($1, $2, 'FOO', 'bar', false)`, uuid.New(), serviceID); err != nil {
+		t.Fatalf("seed var: %v", err)
+	}
+
+	cloneID, err := cloneServiceRow(db, serviceID, projectID, "clone-"+suffix, "")
+	if err != nil {
+		t.Fatalf("clone: %v", err)
+	}
+
+	var status, imageName, env string
+	var maintenance bool
+	var volumes, labels []byte
+	if err := db.QueryRow(`SELECT status, image_name, COALESCE(environment,''), maintenance_mode,
+		volumes, traefik_labels FROM services WHERE id = $1`, cloneID).
+		Scan(&status, &imageName, &env, &maintenance, &volumes, &labels); err != nil {
+		t.Fatalf("read clone: %v", err)
+	}
+	if status != "stopped" || imageName != "traefik/whoami:latest" || env != "production" {
+		t.Fatalf("clone mismatch: %v %v %v", status, imageName, env)
+	}
+	if !maintenance || string(volumes) == "[]" || string(labels) == "{}" {
+		t.Fatalf("clone dropped config: maint=%v vol=%s labels=%s", maintenance, volumes, labels)
+	}
+	doms := loadServiceDomains(db, cloneID)
+	if len(doms) != 1 || doms[0].Domain != "src-"+suffix+".example.com" || !doms[0].IsDefault {
+		t.Fatalf("domains not cloned: %+v", doms)
+	}
+	var varVal string
+	if err := db.QueryRow(`SELECT value FROM environment_variables WHERE service_id = $1 AND key = 'FOO'`,
+		cloneID).Scan(&varVal); err != nil || varVal != "bar" {
+		t.Fatalf("vars not cloned: %v %q", err, varVal)
+	}
+}