Add Belgium and North Sea coverage foundation

frontend/src/styles/app.css

@@ -7347,3 +7347,67 @@ section {
 .workspace-persistent-map[hidden] {
   display: none;
 }
+.coverage-resolution-surface {
+  padding: 18px 20px;
+  border-block: 1px solid var(--line);
+  background: color-mix(in srgb, var(--surface-raised) 94%, var(--accent-soft));
+}
+
+.coverage-zone-row,
+.coverage-summary-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  margin-top: 10px;
+}
+
+.coverage-zone-row span,
+.coverage-summary-row span {
+  padding: 4px 8px;
+  border: 1px solid var(--line);
+  border-radius: 4px;
+  background: var(--surface-raised);
+  color: var(--muted);
+  font-size: 0.78rem;
+}
+
+.coverage-zone-row .coverage-zone-warning {
+  border-color: var(--warning);
+  color: var(--warning);
+}
+
+.coverage-active-theme-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
+  gap: 8px;
+  margin-top: 12px;
+}
+
+.coverage-status-item {
+  display: grid;
+  gap: 3px;
+  min-height: 76px;
+  padding: 10px 12px;
+  border: 1px solid var(--line);
+  border-left: 3px solid var(--muted);
+  border-radius: 6px;
+  background: var(--surface-raised);
+}
+
+.coverage-status-item span,
+.coverage-status-item small {
+  color: var(--muted);
+}
+
+.coverage-status-operational {
+  border-left-color: var(--accent);
+}
+
+.coverage-status-partial {
+  border-left-color: var(--warning);
+}
+
+.coverage-status-not_configured,
+.coverage-status-unsupported {
+  border-left-color: var(--muted);
+}