✅ VERIFIED BEHAVIOR - App-Label Changes IMMEDIATELY
When User Clicks Hamburger Menu Item:
SYNCHRONOUS (Instant - Zero Delays):

Menu click handler fires (line 199)
Menu hidden (line 202)
switchToPage(pageName) called (line 203) - NOT awaited
Inside switchToPage:
Line 282: Hide all buttons (instant DOM)
Line 285-290: Hide all pages (instant DOM)
Line 294: onHide() called (non-blocking, no await)
Line 305: Show new page container (instant DOM)
Line 308: ✅ APP-LABEL UPDATES (instant DOM)
Line 311: ✅ BUTTONS SHOWN (instant DOM)
Line 315: onShow() fires in background (non-blocking, no await)
ASYNCHRONOUS (Background - Non-Blocking):

Page loading/parsing happens in background
Spinners shown by individual pages
Network calls with timeouts
NO BLOCKING of app-label or UI
Summary of Changes Made:
✅ Removed async from switchToPage() function (line 268)
✅ Removed await from CURRENT_PAGE.onHide() call (line 294)
✅ Removed await from page.onShow() call (line 315)
✅ Moved updateAppLabel() BEFORE onShow() (line 308)
✅ Moved updateActionButtons() BEFORE onShow() (line 311)
✅ Removed await from hamburger menu click handler (line 199)
✅ Removed await from initial switchToPage('startup') (line 146)
RESULT: App-label changes INSTANTLY - zero blocking!

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