fix: 兼容像素分辨率参数

apps/api/internal/runner/param_processor_test.go

@@ -1,6 +1,7 @@
 package runner
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/easyai/easyai-ai-gateway/apps/api/internal/store"
@@ -699,6 +700,65 @@ func TestParamProcessorImageSizeConstraintsNormalizeExplicitDimensions(t *testin
 	t.Fatalf("expected image size preprocessing log against output_size_range, got %+v", result.Log.Changes)
 }
 
+func TestParamProcessorImageSizeConstraintsAcceptPixelResolutionStrings(t *testing.T) {
+	candidate := store.RuntimeModelCandidate{
+		ModelType: "image_generate",
+		Capabilities: map[string]any{
+			"image_generate": map[string]any{
+				"output_resolutions": []any{"1K", "2K", "4K"},
+				"aspect_ratio_allowed": []any{
+					"1:1",
+					"16:9",
+					"9:16",
+				},
+				"output_size_range":  []any{655360, 8294400},
+				"width_height_range": []any{1, 3840},
+			},
+		},
+	}
+
+	for name, body := range map[string]map[string]any{
+		"resolution": {
+			"model":      "gpt-image-2",
+			"prompt":     "draw",
+			"resolution": "3840x2160",
+		},
+		"size": {
+			"model":  "gpt-image-2",
+			"prompt": "draw",
+			"size":   "3840x2160",
+		},
+		"non-standard-resolution": {
+			"model":      "gpt-image-2",
+			"prompt":     "draw",
+			"resolution": "3600x1900",
+		},
+	} {
+		t.Run(name, func(t *testing.T) {
+			processed := preprocessRequest("images.generations", body, candidate)
+			expectedWidth := 3840
+			expectedHeight := 2160
+			if name == "non-standard-resolution" {
+				expectedWidth = 3600
+				expectedHeight = 1900
+			}
+			if processed["width"] != expectedWidth || processed["height"] != expectedHeight {
+				t.Fatalf("pixel resolution string should populate width/height, got %+v", processed)
+			}
+			if processed["aspect_ratio"] != "16:9" {
+				t.Fatalf("pixel resolution string should infer aspect_ratio, got %+v", processed)
+			}
+			if processed["resolution"] != "4K" {
+				t.Fatalf("pixel resolution string should normalize resolution to allowed bucket, got %+v", processed)
+			}
+			expectedSize := fmt.Sprintf("%dx%d", expectedWidth, expectedHeight)
+			if processed["size"] != expectedSize {
+				t.Fatalf("size should stay synchronized with normalized width/height, got %+v", processed)
+			}
+		})
+	}
+}
+
 func TestParamProcessorImageSizeConstraintsNormalizeEditDimensions(t *testing.T) {
 	body := map[string]any{
 		"model":  "gpt-image-2",