fix(dashboard): correct compact mobile header positioning

src/patterns/dashboard-composition.css

@@ -31,7 +31,7 @@
 /* Story-only Variant C Compact Header (ui_viz patterns-variant-c--all). Geometry follows the reference: header 48 / padding-x 20,
    title + 18 after it, status bar 40 high floating from the header top and centred at 50% + 18px, padding-x 36, gap 8, 28px controls,
    1x16 dividers, bottom radius 16 with concave wings. Colours and type are HM tokens. Content join / padding stay Dashboard Layout's. */
-.dashboard-production-compact [data-story-slot="compact-header"] {
+.dashboard-story-compact [data-story-slot="compact-header"] {
   position: relative;
   z-index: 1;
   display: flex;