Hide redundant clock and navigation elements for president view

Modify executive-meetings.tsx to conditionally hide the HeaderClock and section navigation when isPresidentView is true.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 77cfe984-2c65-4152-bb7a-0df28274fe66
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: e1c6509c-638c-4c43-8d4f-4b4a5910fc4a
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/c3c252e4-c83d-40ca-9fff-99a3ea60701e/77cfe984-2c65-4152-bb7a-0df28274fe66/fNoqq4C
Replit-Helium-Checkpoint-Created: true

artifacts/tx-os/src/pages/executive-meetings.tsx

@@ -983,11 +983,13 @@ function ExecutiveMeetingsPageInner() {
 
           <div className="flex-1" />
 
-          <div className="hidden sm:flex pointer-events-none absolute inset-x-0 top-0 bottom-0 items-center justify-center print:hidden">
-            <div className="pointer-events-auto">
-              <HeaderClock lang={lang} />
+          {!isPresidentView && (
+            <div className="hidden sm:flex pointer-events-none absolute inset-x-0 top-0 bottom-0 items-center justify-center print:hidden">
+              <div className="pointer-events-auto">
+                <HeaderClock lang={lang} />
+              </div>
             </div>
-          </div>
+          )}
 
           <div className="flex items-center gap-2">
             {!isPresidentView && (