feat(sw): bold header, footer, viewer header and recent-file text

User request 2026-10-20: Composed Controls field values, footer side
titles and category tabs, viewer header file name / button labels /
Model-Layout tabs, recent-file path and preview title use 700. SWHeader
field values stay 400. The preview title gets the existing 14px outline
token; sizes, colors and widths are unchanged.

packages/sw/src/theme/sw-viewer.css

@@ -234,6 +234,11 @@ button.hm-sw-viewer-header__brand { text-align: left; }
 .hm-sw-viewer-header :is(.hm-sw-viewer-header__count, .hm-sw-viewer-header__switch-label, .hm-sw-viewer-status__label) {
   text-shadow: var(--hm-sw-header-label-outline);
 }
+/* Bold (2026-10-20 user request): file name, button labels (파일열기 · 샘플 · 전체보기 · 레이어 · 설정 · 속성) and the
+   Model / Layout tabs. Counts, captions and status keep their own weight; size, color and outline are unchanged. */
+.hm-sw-viewer-header :is(.hm-sw-viewer-header__document-name, .hm-sw-viewer-header__label, .hm-sw-viewer-header__tab) {
+  font-weight: 700;
+}
 /* Clipped (ellipsis) file name: the outline may paint 2px outside the box instead of being cut. */
 .hm-sw-viewer-header .hm-sw-viewer-header__document-name {
   overflow: clip;