feat(registry): reverse-port map-campaign-arrows US rail web

Replace blob landmass with contiguous US silhouette (us-atlas nation) plus
Great Lakes and staggered east densify / transcontinental / west-spur draws
matching MIA How Our Country Grew grammar. Seek-safe GSAP; Tune vars for
palette and speeds; keep Moving Image Archive inspiration credit. No footage.

docs/public/catalog-index.json

@@ -3194,16 +3194,17 @@
     "name": "map-campaign-arrows",
     "type": "block",
     "title": "Map Campaign Arrows",
-    "description": "Newsreel wartime aesthetic with sequential schematic campaign arrows along a path — abstract educational cartography, not glorifying. Inspired by classic newsreel animated-map tropes (Moving Image Archive Animated Maps collection — not affiliated; footage not included).",
+    "description": "Newsreel-style contiguous US silhouette with staggered eastern rail densify, transcontinental draw, and west spurs. Seek-safe SVG/GSAP. Inspired by Moving Image Archive, How Our Country Grew, 1950 (Animated Maps collection) - not affiliated; code recreation, footage not included.",
     "tags": [
       "map",
       "geography",
       "animation",
-      "arrows",
-      "campaign",
+      "rail",
+      "network",
       "newsreel",
-      "schematic",
-      "svg"
+      "svg",
+      "mia",
+      "united-states"
     ],
     "href": "/catalog/blocks/map-campaign-arrows",
     "preview": "https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/map-campaign-arrows.png"