Align header actions/last-update right; hide duration on finished legs

- Restructure BoardDetailsHeader so the Share icon sits top-right next to
  the flight-number badge, and 'Последнее обновление' sits on its own row
  below, right-aligned, matching Angular's flight-details header layout.
- FlightEvents badges only render when changeRoute/reroute are actually
  set, avoiding an empty row on normal flights.
- Hide the leg.flyingTime under the route-status bar once the flight is
  Arrived/Landed/Cancelled — Angular leaves that slot blank in those
  states since the in-flight 'В пути / До прилета' split no longer
  applies.

src/features/online-board/components/BoardDetailsHeader/BoardDetailsHeader.scss

@@ -2,22 +2,36 @@
   display: grid;
   grid-template-columns: auto 1fr;
   align-items: center;
-  gap: 16px;
-  padding: 24px;
+  gap: 8px 16px;
+  padding: 24px 24px 12px;
   background: #fff;
   border-radius: 8px;
 
-  &__badge { grid-column: 1; }
-  &__actions-row { grid-column: 2; display: flex; justify-content: flex-end; }
+  &__badge { grid-column: 1; grid-row: 1; }
+
+  &__actions-row {
+    grid-column: 2;
+    grid-row: 1;
+    display: flex;
+    justify-content: flex-end;
+    align-self: start;
+  }
+
   &__events-row {
     grid-column: 1 / -1;
     display: flex;
-    justify-content: space-between;
     align-items: center;
+    gap: 8px;
+  }
+
+  &__last-update-row {
+    grid-column: 1 / -1;
+    display: flex;
+    justify-content: flex-end;
   }
 
   @media (max-width: 768px) {
-    grid-template-columns: 1fr;
+    grid-template-columns: 1fr auto;
     padding: 16px;
   }
 }

src/features/online-board/components/BoardDetailsHeader/BoardDetailsHeader.tsx

@@ -29,18 +29,22 @@ export const BoardDetailsHeader: FC<BoardDetailsHeaderProps> = ({ flight, locale
       <div className="board-details-header__badge">
         <DetailsHeaderBadge flight={flight} locale={locale} large />
       </div>
+      {/* Angular surfaces a Share icon next to the flight-number header;
+          Print stays off on the board view. */}
       <div className="board-details-header__actions-row">
-        {/* Angular hides share/print on the board details view — only the
-            schedule view toggles them on. Match that default. */}
         <FlightActions
           flight={flight}
           locale={locale}
-          showShare={false}
+          showShare
           showPrint={false}
         />
       </div>
-      <div className="board-details-header__events-row">
-        <FlightEvents changeRoute={changeRoute} reroute={reroute} showDescription />
+      {(changeRoute || reroute) && (
+        <div className="board-details-header__events-row">
+          <FlightEvents changeRoute={changeRoute} reroute={reroute} showDescription />
+        </div>
+      )}
+      <div className="board-details-header__last-update-row">
         <LastUpdate flight={flight} locale={locale} />
       </div>
     </div>

src/features/online-board/components/OnlineBoardDetailsPage.tsx

@@ -206,7 +206,7 @@ function LegRoute({
                 </span>
               </span>
             </div>
-          ) : (
+          ) : isFinished || isCancelled ? null : (
             <div className="leg-route__duration">
               {humanizeFlyingTime(leg.flyingTime, "ru")}
             </div>