fix: bottom nav overlap and safe area handling in referral network

- Raise portal z-index to z-50 so it covers MobileBottomNav
- Use TG SDK bottom safe area (JS) via CSS variable instead of unreliable env()
- Fix TicketNotificationBell regression: conditional inline style for fullscreen only
- Add bottom safe area padding to detail panel scroll areas

src/components/TicketNotificationBell.tsx

@@ -37,7 +37,7 @@ export default function TicketNotificationBell({ isAdmin = false }: TicketNotifi
   const { showToast } = useToast();
   const [isOpen, setIsOpen] = useState(false);
   const dropdownRef = useRef<HTMLDivElement>(null);
-  const { mobile: dropdownTop } = useHeaderHeight();
+  const { mobile: dropdownTop, isMobileFullscreen } = useHeaderHeight();
 
   // Show toast for WebSocket notification
   const showWSNotificationToast = useCallback(
@@ -255,7 +255,7 @@ export default function TicketNotificationBell({ isAdmin = false }: TicketNotifi
       {isOpen && (
         <div
           className="fixed left-4 right-4 z-50 mt-0 w-auto animate-scale-in overflow-hidden rounded-2xl border border-dark-700/50 bg-dark-900/95 shadow-2xl shadow-black/30 backdrop-blur-xl sm:absolute sm:left-auto sm:right-0 sm:top-auto sm:mt-2 sm:w-96"
-          style={{ top: dropdownTop }}
+          style={isMobileFullscreen ? { top: dropdownTop } : undefined}
         >
           {/* Header */}
           <div className="flex items-center justify-between border-b border-dark-700/50 bg-dark-800/30 px-4 py-3">

src/hooks/useHeaderHeight.ts

@@ -6,8 +6,14 @@ import { UI } from '@/config/constants';
  * Telegram MiniApp safe area insets in fullscreen mode.
  *
  * Desktop: 56px (h-14). Mobile: 64px (h-16) + safe area + TG header when fullscreen.
+ * bottomSafeArea: TG SDK bottom inset (home indicator etc.), 0 outside TG.
  */
-export function useHeaderHeight(): { mobile: number; desktop: number } {
+export function useHeaderHeight(): {
+  mobile: number;
+  desktop: number;
+  bottomSafeArea: number;
+  isMobileFullscreen: boolean;
+} {
   const { isFullscreen, safeAreaInset, contentSafeAreaInset, platform, isMobile } =
     useTelegramSDK();
   const isMobileFullscreen = isFullscreen && isMobile;
@@ -21,5 +27,9 @@ export function useHeaderHeight(): { mobile: number; desktop: number } {
       telegramHeaderHeight
     : UI.MOBILE_HEADER_HEIGHT_PX;
 
-  return { mobile, desktop: UI.DESKTOP_HEADER_HEIGHT_PX };
+  const bottomSafeArea = isMobileFullscreen
+    ? Math.max(safeAreaInset.bottom, contentSafeAreaInset.bottom)
+    : 0;
+
+  return { mobile, desktop: UI.DESKTOP_HEADER_HEIGHT_PX, bottomSafeArea, isMobileFullscreen };
 }

src/pages/ReferralNetwork/ReferralNetwork.tsx

@@ -21,7 +21,7 @@ export function ReferralNetwork() {
   const removeScope = useReferralNetworkStore((s) => s.removeScope);
   const clearScope = useReferralNetworkStore((s) => s.clearScope);
 
-  const { mobile: mobileHeaderHeight } = useHeaderHeight();
+  const { mobile: mobileHeaderHeight, bottomSafeArea } = useHeaderHeight();
 
   const hasScope = scope.length > 0;
 
@@ -41,8 +41,13 @@ export function ReferralNetwork() {
   return createPortal(
     <div
       id="referral-network-container"
-      className="fixed inset-x-0 bottom-0 z-40 grid grid-rows-[auto_1fr] bg-[#0a0a0f] lg:!top-14"
-      style={{ top: mobileHeaderHeight }}
+      className="fixed inset-x-0 bottom-0 z-50 grid grid-rows-[auto_1fr] bg-[#0a0a0f] lg:!top-14"
+      style={
+        {
+          top: mobileHeaderHeight,
+          '--safe-bottom': `${bottomSafeArea}px`,
+        } as React.CSSProperties
+      }
     >
       <div className="z-20 border-b border-dark-700/50 bg-dark-900/90 backdrop-blur-md">
         {/* Mobile: two rows — title on top, selector below */}
@@ -122,15 +127,15 @@ export function ReferralNetwork() {
             <>
               <NetworkGraph data={networkData} className="absolute inset-0 h-full w-full" />
 
-              <div className="absolute bottom-3 left-3 z-10 sm:bottom-4 sm:left-4">
+              <div className="absolute bottom-[calc(12px+var(--safe-bottom,0px))] left-3 z-10 sm:bottom-4 sm:left-4">
                 <NetworkStats data={networkData} />
               </div>
 
-              <div className="absolute bottom-3 right-3 z-10 hidden sm:bottom-4 sm:right-4 sm:block">
+              <div className="absolute bottom-[calc(12px+var(--safe-bottom,0px))] right-3 z-10 hidden sm:bottom-4 sm:right-4 sm:block">
                 <NetworkLegend />
               </div>
 
-              <div className="absolute bottom-3 left-1/2 z-10 -translate-x-1/2 sm:bottom-4">
+              <div className="absolute bottom-[calc(12px+var(--safe-bottom,0px))] left-1/2 z-10 -translate-x-1/2 sm:bottom-4">
                 <NetworkControls />
               </div>
             </>

src/pages/ReferralNetwork/components/CampaignDetailPanel.tsx

@@ -50,7 +50,7 @@ export function CampaignDetailPanel({ campaignId, className }: CampaignDetailPan
       </div>
 
       {/* Content */}
-      <div className="overflow-y-auto p-4">
+      <div className="overflow-y-auto p-4 pb-[calc(1rem+var(--safe-bottom,0px))]">
         {isLoading && (
           <div className="flex items-center justify-center py-8">
             <div className="h-6 w-6 animate-spin rounded-full border-2 border-dark-600 border-t-accent-400" />

src/pages/ReferralNetwork/components/UserDetailPanel.tsx

@@ -50,7 +50,7 @@ export function UserDetailPanel({ userId, className }: UserDetailPanelProps) {
       </div>
 
       {/* Content */}
-      <div className="overflow-y-auto p-4">
+      <div className="overflow-y-auto p-4 pb-[calc(1rem+var(--safe-bottom,0px))]">
         {isLoading && (
           <div className="flex items-center justify-center py-8">
             <div className="h-6 w-6 animate-spin rounded-full border-2 border-dark-600 border-t-accent-400" />