fix(geoportal): fullscreen route + local CSS + proper layout

- Add /geoportal to FULLSCREEN_ROUTES (overflow-hidden, no padding)
- Copy maplibre-gl.css to public/ and load from same origin (avoids CDN/CSP)
- Simplify layout: fill parent via h-full w-full (no negative margin hack)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/geoportal/components/geoportal-module.tsx

@@ -93,8 +93,7 @@ export function GeoportalModule() {
   }, []);
 
   return (
-    <div className="relative -mx-4 -mt-4 sm:-mx-6 sm:-mt-6 lg:-mx-8 lg:-mt-8"
-         style={{ height: "calc(100vh - 3.5rem)" }}>
+    <div className="relative h-full w-full">
       {/* Full-bleed map */}
       <MapViewer
         ref={mapHandleRef}

src/modules/geoportal/components/map-viewer.tsx

@@ -4,14 +4,15 @@ import { useRef, useEffect, useState, useCallback, useImperativeHandle, forwardR
 import maplibregl from "maplibre-gl";
 import { cn } from "@/shared/lib/utils";
 
-/* Ensure MapLibre CSS is loaded — static import fails with next/dynamic + standalone */
+/* Ensure MapLibre CSS is loaded — static import fails with next/dynamic + standalone.
+   Load from /public to avoid CDN/CSP issues. */
 if (typeof document !== "undefined") {
   const LINK_ID = "maplibre-gl-css";
   if (!document.getElementById(LINK_ID)) {
     const link = document.createElement("link");
     link.id = LINK_ID;
     link.rel = "stylesheet";
-    link.href = "https://unpkg.com/maplibre-gl@5.21.0/dist/maplibre-gl.css";
+    link.href = "/maplibre-gl.css";
     document.head.appendChild(link);
   }
 }

src/shared/components/layout/app-shell.tsx

@@ -10,7 +10,7 @@ import { cn } from '@/shared/lib/utils';
 const SIDEBAR_COLLAPSED_KEY = 'sidebar:collapsed';
 
 // Routes that need full viewport height and no padding (canvas tools)
-const FULLSCREEN_ROUTES = ['/visual-copilot'];
+const FULLSCREEN_ROUTES = ['/visual-copilot', '/geoportal'];
 
 interface AppShellProps {
   children: React.ReactNode;