slide animation

src/app/routes/__root.tsx

@@ -183,7 +183,19 @@ function RootComponent() {
     ensureSuperTokensFrontend();
     initTelemetry(router);
     if (import.meta.env.PROD && 'serviceWorker' in navigator) {
-      navigator.serviceWorker.register('/sw.js').catch(() => track('sw_register_failed'));
+      // first install claims the page too; only reload on real updates
+      const hadController = !!navigator.serviceWorker.controller;
+      let reloading = false;
+      navigator.serviceWorker.addEventListener('controllerchange', () => {
+        if (!hadController || reloading) return;
+        reloading = true;
+        window.location.reload();
+      });
+      navigator.serviceWorker.register('/sw.js').then((registration) => {
+        document.addEventListener('visibilitychange', () => {
+          if (document.visibilityState === 'visible') registration.update().catch(() => {});
+        });
+      }).catch(() => track('sw_register_failed'));
     }
   }, [router]);
 
@@ -243,6 +255,7 @@ function RootDocument({ children }: { children: React.ReactNode }) {
         }}
       >
         <div className="app">{children}</div>
+        <div className="flxn-theme-overlay" aria-hidden="true" />
         <Scripts />
       </body>
     </html>

src/components/swipeable-tabs.tsx

@@ -48,11 +48,9 @@ function SwipeableTabs({
   }, [search?.tab, tabs, defaultTab]);
 
   const [activeTab, setActiveTab] = useState(getActiveTabFromUrl);
-  const [mountAll, setMountAll] = useState(false);
-  useEffect(() => {
-    const timeoutId = setTimeout(() => startTransition(() => setMountAll(true)), 400);
-    return () => clearTimeout(timeoutId);
-  }, []);
+  const [visitedTabs, setVisitedTabs] = useState<ReadonlySet<number>>(
+    () => new Set([getActiveTabFromUrl()])
+  );
   const [stuck, setStuck] = useState(false);
   const sentinelRef = useRef<HTMLDivElement>(null);
   const [rootRef, setRootRef] = useState<HTMLDivElement | null>(null);
@@ -65,6 +63,9 @@ function SwipeableTabs({
       if (index === activeTab || index < 0 || index >= tabs.length) return;
 
       setActiveTab(index);
+      startTransition(() => {
+        setVisitedTabs((prev) => (prev.has(index) ? prev : new Set(prev).add(index)));
+      });
       embla?.scrollTo(index);
       onTabChange?.(index, tabs[index]);
 
@@ -230,7 +231,7 @@ function SwipeableTabs({
         {tabs.map((tab, index) => (
           <Carousel.Slide key={`${tab.label}-content-${index}`}>
             <Box ref={setSlideRef(index)} style={{ height: "auto", width: "100%", maxWidth: "100vw", overflow: "hidden" }}>
-              {(mountAll || index === activeTab) ? tab.content : null}
+              {(visitedTabs.has(index) || index === activeTab) ? tab.content : null}
             </Box>
           </Carousel.Slide>
         ))}

src/features/core/components/layout.tsx

@@ -52,11 +52,10 @@ const Layout: React.FC<PropsWithChildren> = ({ children }) => {
         maw='100dvw'
         style={{ overflow: 'hidden' }}
       >
-        {/* pane box must be opaque and route-invariant or slides drift */}
+        {/* pane box must be route-invariant or slides drift */}
         <Box
           style={{
             viewTransitionName: 'page',
-            backgroundColor: 'var(--mantine-color-body)',
             marginTop: 'calc(-1 * var(--app-shell-header-offset, 0px))',
             paddingTop: 'var(--app-shell-header-offset, 0px)',
             height: 'calc(100% + var(--app-shell-header-offset, 0px))',

src/themes/aero/theme.css

@@ -178,15 +178,14 @@
 /* 3. Fixed sky backdrop with static bubbles (below all content)     */
 /* ---------------------------------------------------------------- */
 
-[data-theme="aero"] body::before {
-  content: "";
+[data-theme="aero"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: -1;
   pointer-events: none;
 }
 
-[data-theme="aero"][data-mantine-color-scheme="light"] body::before {
+[data-theme="aero"][data-mantine-color-scheme="light"] .flxn-theme-overlay {
   background-color: #e9f6fe;
   background-image:
     radial-gradient(circle 0.6rem at 13.5% 20%, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0) 70%),
@@ -198,7 +197,7 @@
     linear-gradient(180deg, #a5daf6 0%, #c9e9fa 32%, #e9f6fe 60%, #ffffff 100%);
 }
 
-[data-theme="aero"][data-mantine-color-scheme="dark"] body::before {
+[data-theme="aero"][data-mantine-color-scheme="dark"] .flxn-theme-overlay {
   background-color: #071e2d;
   background-image:
     radial-gradient(circle 4rem at 16% 24%, rgba(120, 205, 245, 0) 60%, rgba(120, 205, 245, 0.2) 67%, rgba(120, 205, 245, 0) 74%),

src/themes/clay/theme.css

@@ -203,8 +203,7 @@
 
 /* ---------- 4. Backdrop — studio key light + clay grain ---------- */
 
-[data-theme="clay"] body::before {
-  content: "";
+[data-theme="clay"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: -1; /* behind content — never tints text or surfaces */
@@ -212,7 +211,7 @@
   background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
 }
 
-[data-theme="clay"][data-mantine-color-scheme="light"] body::before {
+[data-theme="clay"][data-mantine-color-scheme="light"] .flxn-theme-overlay {
   background-image: radial-gradient(
       120% 70% at 50% 0%,
       rgba(255, 252, 244, 0.65),
@@ -221,7 +220,7 @@
     url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
 }
 
-[data-theme="clay"][data-mantine-color-scheme="dark"] body::before {
+[data-theme="clay"][data-mantine-color-scheme="dark"] .flxn-theme-overlay {
   background-image: radial-gradient(
       110% 65% at 50% 0%,
       rgba(255, 208, 158, 0.09),

src/themes/deco/theme.css

@@ -363,8 +363,7 @@
 /* ------------------------------------------------------------------ */
 /* 4. Sunburst fan — faint gold rays from top center                  */
 /* ------------------------------------------------------------------ */
-[data-theme="deco"] body::before {
-  content: "";
+[data-theme="deco"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: 9998;

src/themes/gothic/theme.css

@@ -409,8 +409,7 @@
  * 3. Full-page decoration: candlelit vignette (dark scheme only)
  * ---------------------------------------------------------------- */
 
-[data-theme="gothic"][data-mantine-color-scheme="dark"] body::before {
-  content: "";
+[data-theme="gothic"][data-mantine-color-scheme="dark"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: 9998;

src/themes/ocean/theme.css

@@ -153,8 +153,7 @@
 /* 3. Fixed backdrop (below all content)                             */
 /* ---------------------------------------------------------------- */
 
-[data-theme="ocean"] body::before {
-  content: "";
+[data-theme="ocean"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: -1;
@@ -163,7 +162,7 @@
 
 /* Abyssal descent: deep teal fading to ink navy, sparse static bubbles
    rising (bigger and brighter near the sea floor, fading toward the top). */
-[data-theme="ocean"][data-mantine-color-scheme="dark"] body::before {
+[data-theme="ocean"][data-mantine-color-scheme="dark"] .flxn-theme-overlay {
   background-color: #062632;
   background-image:
     url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='640' viewBox='0 0 260 640'%3E%3Cg fill='none' stroke='%239beee2'%3E%3Ccircle cx='36' cy='584' r='5' stroke-opacity='.13'/%3E%3Ccircle cx='44' cy='512' r='3' stroke-opacity='.1'/%3E%3Ccircle cx='210' cy='612' r='4' stroke-opacity='.12'/%3E%3Ccircle cx='202' cy='540' r='2.5' stroke-opacity='.09'/%3E%3Ccircle cx='128' cy='430' r='3.5' stroke-opacity='.1'/%3E%3Ccircle cx='120' cy='360' r='2' stroke-opacity='.08'/%3E%3Ccircle cx='232' cy='300' r='3' stroke-opacity='.09'/%3E%3Ccircle cx='60' cy='250' r='2.5' stroke-opacity='.08'/%3E%3Ccircle cx='150' cy='160' r='2' stroke-opacity='.07'/%3E%3Ccircle cx='90' cy='80' r='1.5' stroke-opacity='.06'/%3E%3C/g%3E%3Cg fill='%239beee2'%3E%3Ccircle cx='70' cy='470' r='1.2' fill-opacity='.1'/%3E%3Ccircle cx='180' cy='390' r='1' fill-opacity='.09'/%3E%3Ccircle cx='40' cy='330' r='1' fill-opacity='.08'/%3E%3Ccircle cx='222' cy='190' r='1' fill-opacity='.07'/%3E%3Ccircle cx='140' cy='40' r='1' fill-opacity='.05'/%3E%3C/g%3E%3C/svg%3E"),
@@ -175,7 +174,7 @@
 
 /* Sunlit shallows: seafoam fading to a sandy floor, with a faint white
    caustic ripple tile — refracted light, kept very subtle. */
-[data-theme="ocean"][data-mantine-color-scheme="light"] body::before {
+[data-theme="ocean"][data-mantine-color-scheme="light"] .flxn-theme-overlay {
   background-color: #eaf6f6;
   background-image:
     url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='220' viewBox='0 0 320 220'%3E%3Cg fill='none' stroke='%23ffffff' stroke-width='1.4'%3E%3Cpath d='M0 40 Q 40 10 80 42 T 160 44 T 240 38 T 320 42' stroke-opacity='.4'/%3E%3Cpath d='M0 110 Q 45 82 90 112 T 180 110 T 268 114 T 320 108' stroke-opacity='.3'/%3E%3Cpath d='M0 180 Q 50 152 100 182 T 200 178 T 300 184 T 320 180' stroke-opacity='.35'/%3E%3C/g%3E%3C/svg%3E"),

src/themes/quest/theme.css

@@ -414,8 +414,7 @@
  * 3. Full-page decoration: worn parchment edges / torchlight
  * ---------------------------------------------------------------- */
 
-[data-theme="quest"][data-mantine-color-scheme="light"] body::before {
-  content: "";
+[data-theme="quest"][data-mantine-color-scheme="light"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: 9998;
@@ -426,8 +425,7 @@
     radial-gradient(55% 38% at 95% 98%, rgba(122, 91, 42, 0.07), transparent 70%);
 }
 
-[data-theme="quest"][data-mantine-color-scheme="dark"] body::before {
-  content: "";
+[data-theme="quest"][data-mantine-color-scheme="dark"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: 9998;

src/themes/sketch/theme.css

@@ -151,8 +151,7 @@
 /* 3. Paper grain / chalk dust — one fixed overlay, feTurbulence    */
 /* ---------------------------------------------------------------- */
 
-[data-theme="sketch"] body::before {
-  content: "";
+[data-theme="sketch"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: 9998;
@@ -163,11 +162,19 @@
   opacity: 0.05;
 }
 
-[data-theme="sketch"][data-mantine-color-scheme="dark"] body::before {
+[data-theme="sketch"][data-mantine-color-scheme="dark"] .flxn-theme-overlay {
   mix-blend-mode: screen;
   opacity: 0.07;
 }
 
+[data-theme="sketch"]::view-transition-new(theme-overlay) {
+  mix-blend-mode: multiply;
+}
+
+[data-theme="sketch"][data-mantine-color-scheme="dark"]::view-transition-new(theme-overlay) {
+  mix-blend-mode: screen;
+}
+
 /* ---------------------------------------------------------------- */
 /* 4. Surfaces — every card its own doodle                          */
 /* ---------------------------------------------------------------- */

src/themes/terminal/theme.css

@@ -575,8 +575,7 @@
 }
 
 /* 4. Decoration: fixed scanline overlay + faint RGB aperture mask */
-[data-theme="terminal"] body::before {
-  content: "";
+[data-theme="terminal"] .flxn-theme-overlay {
   position: fixed;
   inset: 0;
   z-index: 9998;
@@ -589,7 +588,7 @@
 }
 
 @media (prefers-reduced-motion: no-preference) {
-  [data-theme="terminal"] body::before {
+  [data-theme="terminal"] .flxn-theme-overlay {
     animation: terminal-phosphor-drift 9s ease-in-out infinite;
   }
   @keyframes terminal-phosphor-drift {

src/themes/wireframe/theme.css

@@ -150,8 +150,7 @@
 
 /* ---------- 3. Decoration: static perspective floor-grid hint ---------- */
 
-[data-theme="wireframe"] body::before {
-  content: "";
+[data-theme="wireframe"] .flxn-theme-overlay {
   position: fixed;
   left: -30vw;
   right: -30vw;