feat(ui): добавить плотные контролы для viewer

registry/components.json

@@ -28,6 +28,7 @@
       "domContract": ["nodedc-button", "nodedc-icon-button"],
       "summary": "Text and icon actions with shared sizing, states and computed accent contrast.",
       "variants": ["primary", "secondary", "ghost", "danger", "accent"],
+      "sizes": ["default", "compact", "dense"],
       "shapes": ["default", "pill", "rounded"],
       "rules": [
         "Icon-only actions are circular by default.",
@@ -237,7 +238,11 @@
       "package": "@nodedc/ui-react",
       "exports": ["SegmentedControl"],
       "domContract": ["nodedc-segmented"],
-      "summary": "Pill navigation used in the shared top header and compact mode switches."
+      "summary": "Pill navigation used in the shared top header and compact mode switches.",
+      "sizes": ["default", "dense"],
+      "rules": [
+        "Dense is reserved for high-density in-viewer layer and mode toolbars; application headers retain default geometry."
+      ]
     },
     {
       "id": "app-header",