feat(01-design-tokens-rams-foundation-03): browser proof page — Rams basemap + signal-orange route placeholder at KL metro

- index.html: MapLibre GL v4 viewer loading ./liberty-rams.json at the KLCC anchor (101.6958, 3.1513, zoom 13); page chrome token-only (var(--color-*) via ../dist/rams.css, self-hosted Geist/Space Grotesk per D-10/D-16)
- placeholder route vector: 6px signal-orange polyline + 1px matte-black dashed centerline (mockup route ribbon), color read from the token package at runtime (var(--color-signal-orange)); route layers added LAST (accent lives above grayscale, never inside it); README comment marks the vector as consumed by Phase 5
- basemap:preview script: python3 -m http.server 8123 (cwd=theme serves /basemap/ + /dist/rams.css + /fonts within one docroot — plan's cd-variant was doubly broken; open http://localhost:8123/basemap/)
- real-browser render proof (scratch, plan 04 owns committed capture tooling): 8/8 checks pass — maplibre style validation clean, zero failed requests/non-200s, 296 sampled orange route pixels, 0 saturated non-red-hue pixels (grayscale grounding proven pixel-level), 100% warm-gray map area, header chrome rgb(26,26,26)

theme/package.json

@@ -12,6 +12,7 @@
     "build": "tailwindcss -i ./src/theme.css -o ./dist/rams.css --minify",
     "send": "mkdir -p dist/fonts && cp -r fonts/geist fonts/space-grotesk dist/fonts/",
     "sheet": "npm run build && echo 'open theme/src/sheet.html in browser ( Consumes theme/dist/rams.css )'",
-    "basemap": "node basemap/build.mjs"
+    "basemap": "node basemap/build.mjs",
+    "basemap:preview": "python3 -m http.server 8123"
   }
 }