feat(27-03): wire TopNav, BottomTabBar, and FAB changes into __root.tsx

- Replace TotalsBar import with TopNav and BottomTabBar imports
- Remove isDashboard and totalsBarProps variables
- Render TopNav instead of TotalsBar
- Add /setups to isPublicRoute for anonymous direct navigation
- Wrap FabMenu in hidden md:block for mobile hiding
- Add BottomTabBar after FAB block (md:hidden in component itself)
- Add pb-16 md:pb-0 to root div to prevent content occlusion by bottom tab bar

src/client/routes/__root.tsx

@@ -16,9 +16,10 @@ import { AuthPromptModal } from "../components/AuthPromptModal";
 import { CatalogSearchOverlay } from "../components/CatalogSearchOverlay";
 import { ConfirmDialog } from "../components/ConfirmDialog";
 import { ExternalLinkDialog } from "../components/ExternalLinkDialog";
+import { BottomTabBar } from "../components/BottomTabBar";
 import { FabMenu } from "../components/FabMenu";
 import { OnboardingWizard } from "../components/OnboardingWizard";
-import { TotalsBar } from "../components/TotalsBar";
+import { TopNav } from "../components/TopNav";
 import { useAuth } from "../hooks/useAuth";
 import { useDeleteCandidate } from "../hooks/useCandidates";
 import { useOnboardingComplete } from "../hooks/useSettings";
@@ -114,15 +115,12 @@ function RootLayout() {
 	}) as { threadId?: string } | false;
 	const currentThreadId = threadMatch ? Number(threadMatch.threadId) : null;
 
-	const isDashboard = !!matchRoute({ to: "/" });
-
-	const totalsBarProps = isDashboard ? {} : { linkTo: "/" };
-
 	// Allow public routes through without auth
 	const isPublicRoute =
 		location.pathname === "/" ||
 		location.pathname.startsWith("/users/") ||
 		location.pathname.startsWith("/global-items") ||
+		location.pathname === "/setups" ||
 		location.pathname.startsWith("/setups/") ||
 		location.pathname === "/login";
 
@@ -136,8 +134,8 @@ function RootLayout() {
 	}
 
 	return (
-		<div className="min-h-screen bg-gray-50">
-			<TotalsBar {...totalsBarProps} />
+		<div className="min-h-screen bg-gray-50 pb-16 md:pb-0">
+			<TopNav />
 			<Outlet />
 
 			{/* Item Confirm Delete Dialog */}
@@ -169,7 +167,14 @@ function RootLayout() {
 			)}
 
 			{/* Floating Action Button */}
-			{showFab && <FabMenu isSetupsPage={isSetupsPage} />}
+			{showFab && (
+				<div className="hidden md:block">
+					<FabMenu isSetupsPage={isSetupsPage} />
+				</div>
+			)}
+
+			{/* Bottom Tab Bar (mobile only) */}
+			<BottomTabBar />
 
 			{/* Catalog Search Overlay */}
 			<CatalogSearchOverlay />