增加即梦图片5.0和视频2.5的能力

backend/internal/application/runtime_test.go

@@ -190,6 +190,31 @@ func TestRuntimeProviderJobBuilderRefreshesDatabaseSettings(t *testing.T) {
 	}
 }
 
+func TestRuntimeProviderJobBuilderRoutesSeedreamWithoutReplacingJimeng(t *testing.T) {
+	values := map[string]string{
+		"SEEDANCE_API_KEY":      "ark-secret",
+		"IMAGE_GENERATE_ENGINE": "seedream",
+	}
+	getenv := func(name string) string { return values[name] }
+	builder := configuredProviderJobBuilder(getenv, true)
+	command, err := builder.Build(context.Background(), "owner", "", "image.generate", "", map[string]any{
+		"prompt": "draw", "engine": "seedream", "settings": map[string]any{"size": "1.5K", "outputFormat": "png", "optimizeMode": "standard"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if command.Job.Provider != "seedream" || command.Job.ReqKey != providers.Seedream50ProModel {
+		t.Fatalf("job=%#v", command.Job)
+	}
+	jimeng, err := builder.Build(context.Background(), "owner", "", "image.generate", "", map[string]any{"prompt": "draw", "engine": "jimeng"})
+	if err == nil || !strings.Contains(err.Error(), "VOLCENGINE_ACCESS_KEY_ID") {
+		t.Fatalf("jimeng availability error=%v job=%#v", err, jimeng.Job)
+	}
+	if _, ok := buildProviderRegistryWithClient(getenv, http.DefaultClient, 2<<20)["seedream"].(*providers.Seedream); !ok {
+		t.Fatalf("seedream adapter is not registered")
+	}
+}
+
 func TestRuntimeProviderResolverUsesLatestDatabaseCredential(t *testing.T) {
 	var authorizations []string
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, request *http.Request) {
@@ -288,6 +313,22 @@ func TestProviderVideoTargetsUseDocumentedSeedanceDefaults(t *testing.T) {
 	}
 }
 
+func TestProviderVideoModelsKeepSeedance20And25Available(t *testing.T) {
+	targets := providerVideoModels(func(string) string { return "" })
+	for _, model := range []string{"doubao-seedance-2-0-260128", "doubao-seedance-2-5-260628"} {
+		target, ok := targets[model]
+		if !ok || target.Provider != "seedance" || target.Model != model {
+			t.Fatalf("target[%q] = %#v", model, target)
+		}
+	}
+	if seedanceCapabilityLimits("doubao-seedance-2-0-260128")["durationSeconds"].(map[string]int)["max"] != 15 {
+		t.Fatal("Seedance 2.0 duration limit changed")
+	}
+	if seedanceCapabilityLimits("doubao-seedance-2-5-260628")["durationSeconds"].(map[string]int)["max"] != 30 {
+		t.Fatal("Seedance 2.5 duration limit is not 30 seconds")
+	}
+}
+
 func TestCapabilitySummaryMatchesConfiguredDefaultVideoEngine(t *testing.T) {
 	for _, test := range []struct {
 		name, engine, wantEngine, wantProvider, wantModel string