Handle Gemini inline data in asset and size processing

apps/api/internal/runner/param_processor_test.go

@@ -759,6 +759,75 @@ func TestParamProcessorImageSizeConstraintsAcceptPixelResolutionStrings(t *testi
 	}
 }
 
+func TestParamProcessorImageSizeConstraintsPreferPixelSizeOverExplicitDimensions(t *testing.T) {
+	for name, testcase := range map[string]struct {
+		kind      string
+		modelType string
+		body      map[string]any
+	}{
+		"generate": {
+			kind:      "images.generations",
+			modelType: "image_generate",
+			body: map[string]any{
+				"model":        "gpt-image-2",
+				"prompt":       "draw",
+				"size":         "2160x1566",
+				"width":        1024,
+				"height":       1024,
+				"aspect_ratio": "1:1",
+			},
+		},
+		"edit": {
+			kind:      "images.edits",
+			modelType: "image_edit",
+			body: map[string]any{
+				"model":        "gpt-image-2",
+				"prompt":       "edit",
+				"image":        "https://example.com/input.png",
+				"size":         "2160x1566",
+				"width":        1024,
+				"height":       1024,
+				"aspect_ratio": "1:1",
+			},
+		},
+	} {
+		t.Run(name, func(t *testing.T) {
+			candidate := store.RuntimeModelCandidate{
+				ModelType: testcase.modelType,
+				Capabilities: map[string]any{
+					testcase.modelType: map[string]any{
+						"output_resolutions": []any{"1K", "2K", "4K"},
+						"aspect_ratio_allowed": []any{
+							"1:1",
+							"4:3",
+							"16:9",
+							"9:16",
+						},
+						"output_size_range":     []any{655360, 8294400},
+						"width_height_range":    []any{1, 3840},
+						"width_height_multiple": 16,
+						"input_multiple_images": true,
+					},
+				},
+			}
+
+			processed := preprocessRequest(testcase.kind, testcase.body, candidate)
+			if processed["width"] != 2160 || processed["height"] != 1568 {
+				t.Fatalf("size dimensions should win before constraints, got %+v", processed)
+			}
+			if processed["size"] != "2160x1568" {
+				t.Fatalf("size should sync with constrained dimensions, got %+v", processed)
+			}
+			if processed["aspect_ratio"] != "4:3" {
+				t.Fatalf("aspect_ratio should be inferred from size dimensions, got %+v", processed)
+			}
+			if processed["resolution"] != "2K" {
+				t.Fatalf("resolution should be inferred from size dimensions, got %+v", processed)
+			}
+		})
+	}
+}
+
 func TestParamProcessorImageSizeConstraintsNormalizeEditDimensions(t *testing.T) {
 	body := map[string]any{
 		"model":  "gpt-image-2",