Simplify profile theme: swap global CSS vars instead of scoped theme wrapper

- Remove ScopedThemeColumns, scopedThemeTokens from LayoutContext and MainLayout
- Profile page now temporarily overrides :root CSS vars with the visited user's theme
- On navigation away, user's own theme is restored via effect cleanup
- Entire page (sidebar, center, right) uses the profile theme
- Removed all display:contents and background extension hacks

src/components/MainLayout.tsx

@@ -7,7 +7,6 @@ import { MobileBottomNav } from '@/components/MobileBottomNav';
 import { MobileDrawer } from '@/components/MobileDrawer';
 import { FloatingComposeButton } from '@/components/FloatingComposeButton';
 import { Skeleton } from '@/components/ui/skeleton';
-import { ScopedTheme } from '@/components/ScopedTheme';
 import { LayoutStore, LayoutStoreContext, useLayoutSnapshot } from '@/contexts/LayoutContext';
 import { cn } from '@/lib/utils';
 
@@ -63,7 +62,7 @@ function PageSkeleton() {
 
 /** Inner component that reads layout options from the context store. */
 function MainLayoutInner() {
-  const { rightSidebar, showFAB = false, fabKind = 1, fabHref, scopedThemeTokens, noBottomSpacer = false, wrapperClassName } = useLayoutSnapshot();
+  const { rightSidebar, showFAB = false, fabKind = 1, fabHref, noBottomSpacer = false, wrapperClassName } = useLayoutSnapshot();
   const [drawerOpen, setDrawerOpen] = useState(false);
 
   return (
@@ -83,20 +82,18 @@ function MainLayoutInner() {
 
         {/* Main content + right sidebar: inside Suspense so the left sidebar persists while lazy pages load */}
         <Suspense fallback={<PageSkeleton />}>
-          <ScopedThemeColumns tokens={scopedThemeTokens}>
-            {/* Wrap the center column in a relative container for the FAB */}
-            <div className={cn("relative flex-1 min-w-0 sidebar:max-w-[600px] sidebar:border-l xl:border-r border-border", showFAB && "pb-24")}>
-              <Outlet />
-              {showFAB && (
-                <div className="sticky bottom-20 sidebar:bottom-6 z-30 pointer-events-none flex justify-end pr-6">
-                  <div className="pointer-events-auto">
-                    <FloatingComposeButton kind={fabKind} href={fabHref} />
-                  </div>
+          {/* Wrap the center column in a relative container for the FAB */}
+          <div className={cn("relative flex-1 min-w-0 sidebar:max-w-[600px] sidebar:border-l xl:border-r border-border", showFAB && "pb-24")}>
+            <Outlet />
+            {showFAB && (
+              <div className="sticky bottom-20 sidebar:bottom-6 z-30 pointer-events-none flex justify-end pr-6">
+                <div className="pointer-events-auto">
+                  <FloatingComposeButton kind={fabKind} href={fabHref} />
                 </div>
-              )}
-            </div>
-            {rightSidebar ?? <RightSidebar />}
-          </ScopedThemeColumns>
+              </div>
+            )}
+          </div>
+          {rightSidebar ?? <RightSidebar />}
         </Suspense>
       </div>
 
@@ -109,21 +106,6 @@ function MainLayoutInner() {
   );
 }
 
-/**
- * Wraps center + right columns in a ScopedTheme when profile theme tokens are provided.
- * Uses `display: contents` so the wrapper doesn't affect the flex layout.
- */
-function ScopedThemeColumns({ tokens, children }: { tokens?: import('@/themes').ThemeTokens; children: React.ReactNode }) {
-  if (!tokens) return <>{children}</>;
-  return (
-    <ScopedTheme tokens={tokens} className="relative flex flex-1 min-w-0 bg-background text-foreground">
-      {/* Extend background to the right edge of the viewport */}
-      <div className="absolute top-0 bottom-0 left-0 bg-background pointer-events-none" style={{ right: 'calc(-50vw + 50%)' }} aria-hidden />
-      {children}
-    </ScopedTheme>
-  );
-}
-
 /**
  * Persistent layout shell rendered once by the router.
  * Provides a LayoutStore so child pages can configure layout options

src/components/ProfileRightSidebar.tsx

@@ -315,7 +315,7 @@ export function ProfileRightSidebar({ fields, mediaEvents, mediaLoading: mediaLo
   const mediaLoading = mediaLoadingProp ?? false;
 
   return (
-    <aside className="w-[300px] shrink-0 hidden xl:flex flex-col sticky top-0 h-screen overflow-y-auto pt-5 pb-3 px-5 bg-background">
+    <aside className="w-[300px] shrink-0 hidden xl:flex flex-col sticky top-0 h-screen overflow-y-auto pt-5 pb-3 px-5">
       {/* Media Section */}
       <section className="mb-6">
         <h2 className="text-xl font-bold mb-3">Media</h2>

src/contexts/LayoutContext.ts

@@ -10,8 +10,6 @@ export interface LayoutOptions {
   fabKind?: number;
   /** If set, the FAB navigates to this URL instead of opening a compose dialog. */
   fabHref?: string;
-  /** If set, applies scoped theme CSS variables to the center and right columns. */
-  scopedThemeTokens?: import('@/themes').ThemeTokens;
   /** Skip the bottom nav spacer (for pages that handle their own bottom padding) */
   noBottomSpacer?: boolean;
   /** Additional classes for the wrapper div */
@@ -76,7 +74,6 @@ export function useLayoutOptions(options: LayoutOptions): void {
     prev.current.showFAB !== options.showFAB ||
     prev.current.fabKind !== options.fabKind ||
     prev.current.fabHref !== options.fabHref ||
-    prev.current.scopedThemeTokens !== options.scopedThemeTokens ||
     prev.current.noBottomSpacer !== options.noBottomSpacer ||
     prev.current.wrapperClassName !== options.wrapperClassName ||
     prev.current.rightSidebar !== options.rightSidebar;

src/pages/ProfilePage.tsx

@@ -38,7 +38,9 @@ import { EmojifiedText } from '@/components/CustomEmoji';
 import { PullToRefresh } from '@/components/PullToRefresh';
 
 import { useActiveProfileTheme } from '@/hooks/useActiveProfileTheme';
+import { useTheme } from '@/hooks/useTheme';
 import { useFeedSettings } from '@/hooks/useFeedSettings';
+import { buildThemeCss, builtinThemes, resolveTheme } from '@/themes';
 import { cn, STICKY_HEADER_CLASS } from '@/lib/utils';
 import type { FeedItem } from '@/lib/feedUtils';
 import type { NostrEvent } from '@nostrify/nostrify';
@@ -723,6 +725,38 @@ export function ProfilePage() {
   );
   const profileThemeTokens = profileThemeQuery.data?.tokens;
 
+  // Temporarily apply the visited user's theme globally while on their profile
+  const { theme: ownTheme, customTheme: ownCustomTheme } = useTheme();
+  useEffect(() => {
+    if (!profileThemeTokens) return;
+
+    // Inject the profile theme's CSS vars onto :root
+    const css = buildThemeCss(profileThemeTokens);
+    let el = document.getElementById('theme-vars') as HTMLStyleElement | null;
+    if (!el) {
+      el = document.createElement('style');
+      el.id = 'theme-vars';
+      document.head.appendChild(el);
+    }
+    const previousCss = el.textContent;
+    el.textContent = css;
+
+    // Restore the user's own theme on cleanup
+    return () => {
+      const styleEl = document.getElementById('theme-vars') as HTMLStyleElement | null;
+      if (styleEl) {
+        if (previousCss) {
+          styleEl.textContent = previousCss;
+        } else {
+          // Fallback: rebuild from current theme setting
+          const resolved = resolveTheme(ownTheme);
+          const tokens = ownCustomTheme ?? builtinThemes[resolved as keyof typeof builtinThemes] ?? builtinThemes.dark;
+          styleEl.textContent = buildThemeCss(tokens);
+        }
+      }
+    };
+  }, [profileThemeTokens]); // eslint-disable-line react-hooks/exhaustive-deps
+
   const pinnedIds = useMemo(() => supplementary?.pinnedIds ?? [], [supplementary?.pinnedIds]);
 
   const { data: pinnedEvents = [], isLoading: pinnedEventsLoading } = useQuery({
@@ -883,7 +917,6 @@ export function ProfilePage() {
   useLayoutOptions(pubkey ? {
     rightSidebar: <ProfileRightSidebar fields={fields} mediaEvents={mediaEvents} mediaLoading={mediaPending} />,
     showFAB: true,
-    scopedThemeTokens: profileThemeTokens,
   } : {});
 
   if (!pubkey) {