Handle Gemini inline data in asset and size processing

apps/api/internal/runner/request_assets_test.go

@@ -76,6 +76,52 @@ func TestHydrateProviderRequestAssetsConvertsBase64ArrayField(t *testing.T) {
 	}
 }
 
+func TestHydrateProviderRequestAssetsConvertsGeminiInlineDataAssetToRawBase64(t *testing.T) {
+	storageDir := t.TempDir()
+	fileName := "gateway-request-asset-gemini-inline.png"
+	payload := []byte("gemini inline image bytes")
+	if err := os.WriteFile(filepath.Join(storageDir, fileName), payload, 0o644); err != nil {
+		t.Fatalf("write request asset: %v", err)
+	}
+	service := &Service{cfg: config.Config{LocalUploadedStorageDir: storageDir}}
+	body := map[string]any{
+		"contents": []any{
+			map[string]any{
+				"role": "user",
+				"parts": []any{
+					map[string]any{
+						"inlineData": map[string]any{
+							"mimeType": "image/png",
+							"data": map[string]any{
+								"assetRef": map[string]any{
+									"sha256":          "sha-gemini-inline",
+									"contentType":     "image/png",
+									"url":             "/static/uploaded/" + fileName,
+									"storageProvider": "local_static",
+								},
+								"url": "/static/uploaded/" + fileName,
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	hydrated, err := service.hydrateProviderRequestAssets(context.Background(), body, store.RuntimeModelCandidate{Provider: "gemini"})
+	if err != nil {
+		t.Fatalf("hydrate request assets: %v", err)
+	}
+	contents := hydrated["contents"].([]any)
+	content := contents[0].(map[string]any)
+	parts := content["parts"].([]any)
+	part := parts[0].(map[string]any)
+	inlineData := part["inlineData"].(map[string]any)
+	if got, want := stringFromAny(inlineData["data"]), base64.StdEncoding.EncodeToString(payload); got != want {
+		t.Fatalf("unexpected hydrated inlineData base64: got %q want %q", got, want)
+	}
+}
+
 func TestHydrateProviderRequestAssetsConvertsVolcesImageURLAssetToDataURL(t *testing.T) {
 	storageDir := t.TempDir()
 	fileName := "gateway-request-asset-chat-image.png"