Remove auto-rotation stop from navigation menu

Navigation menu now jumps to selected site but allows rotation to continue.
The pause button remains the only control for stopping rotation.

Changes:
- Removed manualNavigationMode=true from navigate-to-tab handler
- Removed inactivityExtensionUntil=0 (related to manual mode)
- Updated logging to reflect that rotation continues

Users can now use the navigation menu to quickly jump to any site while
keeping rotation active, or use the pause button if they want to stop on
a specific site.

install_kiosk_0.9.8.sh

@@ -5307,12 +5307,10 @@ function createWindow(){
     const viewIndex=tabIndexToViewIndex[tabIndex];
     if(viewIndex!==undefined&&viewIndex>=0&&viewIndex<views.length){
       console.log('[NAV] Switching to view index '+viewIndex);
-      manualNavigationMode=true;
       currentIndex=viewIndex;
       attachView(currentIndex);
       markActivity();
-      inactivityExtensionUntil=0;
-      console.log('[NAV] Navigation complete → manualNavigationMode=TRUE');
+      console.log('[NAV] Navigation complete, rotation continues');
     }else{
       console.error('[NAV] Invalid view index:',viewIndex);
     }