diff --git a/docs/miniapp-design.md b/docs/miniapp-design.md
index 2cbead9..d5dc4e9 100644
--- a/docs/miniapp-design.md
+++ b/docs/miniapp-design.md
@@ -26,10 +26,10 @@ Telegram’s guidelines state:
 
 Theme is resolved in this order:
 
-1. Hash parameters: `tgWebAppColorScheme`, `tgWebAppThemeParams` (parsed in the inline script in `webapp-next/src/app/layout.tsx`).
-2. At runtime: `Telegram.WebApp.colorScheme` and `Telegram.WebApp.themeParams` via `use-telegram-theme.ts` and `TelegramProvider`.
+1. Hash parameters: `tgWebAppColorScheme`, `tgWebAppThemeParams` (parsed in the shared inline script from `webapp-next/src/lib/theme-bootstrap-script.ts`, used in layout and global-error).
+2. At runtime: `Telegram.WebApp.colorScheme` and `Telegram.WebApp.themeParams` via **TelegramProvider** (theme sync is provider-owned in `ThemeSync` / `useTelegramTheme`), so every route (/, /admin, not-found, error) receives live theme updates.
 
-The inline script in the layout maps all Telegram theme keys to `--tg-theme-*` CSS variables on the document root. The hook sets `data-theme` (`light` / `dark`) and applies Mini App background/header colors.
+The inline script maps all Telegram theme keys to `--tg-theme-*` CSS variables on the document root. The provider sets `data-theme` (`light` / `dark`) and applies Mini App background/header colors.
 
 ### 2.2 Mapping (ThemeParams → app tokens)
 
@@ -95,10 +95,9 @@ Use **only** these tokens and Tailwind/shadcn aliases (`bg-background`, `text-mu
 
 ### 3.3 Safe area and content safe area
 
-- **Class `.content-safe`** (in `globals.css`): Applies:
-  - `padding-top: var(--tg-viewport-content-safe-area-inset-top, env(safe-area-inset-top, 0))`
-  - `padding-bottom: var(--tg-viewport-content-safe-area-inset-bottom, env(safe-area-inset-bottom, 0))`
-- Use `.content-safe` on the **root container of each page** so content is not covered by the Telegram header or bottom bar (Bot API 8.0+).
+- **CSS custom properties** (in `globals.css`): `--app-safe-top`, `--app-safe-bottom`, `--app-safe-left`, `--app-safe-right` use Telegram viewport content-safe-area insets with `env(safe-area-inset-*)` fallbacks. Use these for sticky positioning and padding so layout works on notched and landscape devices.
+- **Class `.content-safe`**: Applies padding on all four sides using the above tokens so content does not sit under Telegram header, bottom bar, or side chrome (Bot API 8.0+). Use `.content-safe` on the **root container of each page** and on full-screen fallback screens (not-found, error, access denied).
+- **Sticky headers:** Use `top-[var(--app-safe-top)]` (not `top-0`) for sticky elements (e.g. calendar header, admin header) so they sit below the Telegram UI instead of overlapping it.
 - Lists that extend to the bottom should also account for bottom inset (e.g. `padding-bottom: var(--tg-viewport-content-safe-area-inset-bottom, 12px)` in `.container-app`).
 
 ### 3.4 Sheets and modals
@@ -197,7 +196,8 @@ See `webapp-next/src/components/day-detail/DayDetail.tsx` for the Sheet content.
 
 ## 8. Telegram integration
 
-- **Header and background:** On init (layout script and `use-telegram-theme.ts`), call:
+- **Ready gate:** `callMiniAppReadyOnce()` (in `lib/telegram-ready.ts`) is invoked by the layout’s `ReadyGate` when `appContentReady` becomes true. Any route (/, /admin, not-found, in-app error) that sets `appContentReady` will trigger it so Telegram hides its loader; no route-specific logic is required.
+- **Header and background:** On init (layout script and provider’s theme sync), call:
   - `setBackgroundColor('bg_color')`
   - `setHeaderColor('bg_color')`
   - `setBottomBarColor('bottom_bar_bg_color')` when available (Bot API 7.10+).
diff --git a/webapp-next/src/app/admin/page.tsx b/webapp-next/src/app/admin/page.tsx
index 1222120..87d55ca 100644
--- a/webapp-next/src/app/admin/page.tsx
+++ b/webapp-next/src/app/admin/page.tsx
@@ -6,8 +6,10 @@
 
 "use client";
 
+import { useEffect } from "react";
 import { useAdminPage, AdminDutyList, ReassignSheet } from "@/components/admin";
 import { useTranslation } from "@/i18n/use-translation";
+import { useAppStore } from "@/store/app-store";
 import { AccessDeniedScreen } from "@/components/states/AccessDeniedScreen";
 import { LoadingState } from "@/components/states/LoadingState";
 import { ErrorState } from "@/components/states/ErrorState";
@@ -20,6 +22,12 @@ const PAGE_WRAPPER_CLASS =
 export default function AdminPage() {
   const { t, monthName } = useTranslation();
   const admin = useAdminPage();
+  const setAppContentReady = useAppStore((s) => s.setAppContentReady);
+
+  // Signal ready so Telegram hides loader when opening /admin directly.
+  useEffect(() => {
+    setAppContentReady(true);
+  }, [setAppContentReady]);
 
   if (!admin.isAllowed) {
     return (
@@ -57,7 +65,7 @@ export default function AdminPage() {
 
   return (
     <div className={PAGE_WRAPPER_CLASS}>
-      <header className="sticky top-0 z-10 flex flex-col items-center border-b border-border bg-background py-3">
+      <header className="sticky top-[var(--app-safe-top)] z-10 flex flex-col items-center border-b border-border bg-background py-3">
         <div className="flex w-full items-center justify-between px-1">
           <Button
             type="button"
diff --git a/webapp-next/src/app/global-error.tsx b/webapp-next/src/app/global-error.tsx
index 351eb6c..509d0c1 100644
--- a/webapp-next/src/app/global-error.tsx
+++ b/webapp-next/src/app/global-error.tsx
@@ -5,8 +5,12 @@
 
 "use client";
 
+import { useEffect } from "react";
 import "./globals.css";
 import { getLang, translate } from "@/i18n/messages";
+import { callMiniAppReadyOnce } from "@/lib/telegram-ready";
+import { THEME_BOOTSTRAP_SCRIPT } from "@/lib/theme-bootstrap-script";
+import { Button } from "@/components/ui/button";
 
 export default function GlobalError({
   error,
@@ -16,6 +20,11 @@ export default function GlobalError({
   reset: () => void;
 }) {
   const lang = getLang();
+
+  useEffect(() => {
+    callMiniAppReadyOnce();
+  }, []);
+
   return (
     <html
       lang={lang === "ru" ? "ru" : "en"}
@@ -23,28 +32,19 @@ export default function GlobalError({
       suppressHydrationWarning
     >
       <head>
-        {/* Same theme detection as layout: hash / Telegram / prefers-color-scheme → data-theme */}
-        <script
-          dangerouslySetInnerHTML={{
-            __html: `(function(){var scheme='dark';var root=document.documentElement;var hash=typeof location!=='undefined'&&location.hash?location.hash.slice(1):'';if(hash){var params={};hash.split('&').forEach(function(p){var i=p.indexOf('=');if(i===-1)return;var k=decodeURIComponent(p.slice(0,i));var v=p.slice(i+1);params[k]=v;});if(params.tgWebAppColorScheme==='light'||params.tgWebAppColorScheme==='dark')scheme=params.tgWebAppColorScheme;if(params.tgWebAppThemeParams){try{var theme=JSON.parse(decodeURIComponent(params.tgWebAppThemeParams));var tgKeys=['bg_color','text_color','hint_color','link_color','button_color','button_text_color','secondary_bg_color','header_bg_color','accent_text_color','destructive_text_color','section_bg_color','section_header_text_color','section_separator_color','subtitle_text_color','bottom_bar_bg_color'];tgKeys.forEach(function(k){var v=theme[k];if(v&&typeof v==='string')root.style.setProperty('--tg-theme-'+k.replace(/_/g,'-'),v);});Object.keys(theme).forEach(function(k){var v=theme[k];if(v&&typeof v==='string')root.style.setProperty('--tg-theme-'+k.replace(/_/g,'-'),v);});}catch(e){}}}var twa=typeof window!=='undefined'&&window.Telegram&&window.Telegram.WebApp;if(scheme!=='light'&&scheme!=='dark'&&twa&&(twa.colorScheme==='light'||twa.colorScheme==='dark'))scheme=twa.colorScheme;if(scheme!=='light'&&scheme!=='dark'){try{var s=getComputedStyle(root).getPropertyValue('--tg-color-scheme').trim();if(s==='light'||s==='dark')scheme=s;}catch(e){} }if(scheme!=='light'&&scheme!=='dark')scheme=window.matchMedia&&window.matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light';root.setAttribute('data-theme',scheme);if(twa){if(twa.setBackgroundColor)twa.setBackgroundColor('bg_color');if(twa.setHeaderColor)twa.setHeaderColor('bg_color');}})();`,
-          }}
-        />
+        <script dangerouslySetInnerHTML={{ __html: THEME_BOOTSTRAP_SCRIPT }} />
       </head>
       <body className="antialiased">
-        <div className="flex min-h-[var(--tg-viewport-stable-height,100vh)] flex-col items-center justify-center gap-4 bg-background px-4 text-foreground">
+        <div className="content-safe flex min-h-[var(--tg-viewport-stable-height,100vh)] flex-col items-center justify-center gap-4 bg-background px-4 text-foreground">
           <h1 className="text-xl font-semibold">
             {translate(lang, "error_boundary.message")}
           </h1>
           <p className="text-center text-muted-foreground">
             {translate(lang, "error_boundary.description")}
           </p>
-          <button
-            type="button"
-            onClick={() => reset()}
-            className="rounded-lg bg-primary px-4 py-2 text-primary-foreground hover:bg-primary/90"
-          >
+          <Button type="button" onClick={() => reset()}>
             {translate(lang, "error_boundary.reload")}
-          </button>
+          </Button>
         </div>
       </body>
     </html>
diff --git a/webapp-next/src/app/globals.css b/webapp-next/src/app/globals.css
index 91254b6..e8c0e16 100644
--- a/webapp-next/src/app/globals.css
+++ b/webapp-next/src/app/globals.css
@@ -89,6 +89,11 @@
   --ease-out: cubic-bezier(0.32, 0.72, 0, 1);
   --radius: 0.625rem;
   --calendar-block-min-height: 260px;
+  /** Safe-area insets for sticky headers and full-screen (Telegram viewport + env fallbacks). */
+  --app-safe-top: var(--tg-viewport-content-safe-area-inset-top, env(safe-area-inset-top, 0));
+  --app-safe-bottom: var(--tg-viewport-content-safe-area-inset-bottom, env(safe-area-inset-bottom, 0));
+  --app-safe-left: var(--tg-viewport-content-safe-area-inset-left, env(safe-area-inset-left, 0));
+  --app-safe-right: var(--tg-viewport-content-safe-area-inset-right, env(safe-area-inset-right, 0));
   /** Minimum height for the 6-row calendar grid so cells stay comfortably large. */
   --calendar-grid-min-height: 264px;
   /** Minimum height per calendar row (6 rows × 44px ≈ 264px). */
@@ -272,14 +277,16 @@ html::-webkit-scrollbar {
 
 /* Safe area for Telegram Mini App (notch / status bar). */
 .pt-safe {
-  padding-top: var(--tg-viewport-content-safe-area-inset-top, env(safe-area-inset-top, 0));
+  padding-top: var(--app-safe-top);
 }
 
-/* Content safe area: top/bottom only to avoid overlap with Telegram header/bottom bar (Bot API 8.0+).
-   Horizontal padding is left to layout classes (e.g. px-3) so indents are preserved when viewport vars are 0. */
+/* Content safe area: top/bottom/left/right so content and sticky chrome sit below Telegram UI.
+   Use for full-screen wrappers; horizontal padding can be extended by layout (e.g. px-3). */
 .content-safe {
-  padding-top: var(--tg-viewport-content-safe-area-inset-top, env(safe-area-inset-top, 0));
-  padding-bottom: var(--tg-viewport-content-safe-area-inset-bottom, env(safe-area-inset-bottom, 0));
+  padding-top: var(--app-safe-top);
+  padding-bottom: var(--app-safe-bottom);
+  padding-left: var(--app-safe-left);
+  padding-right: var(--app-safe-right);
 }
 
 /* Sticky calendar header: shadow when scrolled (useStickyScroll). */
diff --git a/webapp-next/src/app/layout.tsx b/webapp-next/src/app/layout.tsx
index 85b71e7..ef354d4 100644
--- a/webapp-next/src/app/layout.tsx
+++ b/webapp-next/src/app/layout.tsx
@@ -1,7 +1,9 @@
 import type { Metadata, Viewport } from "next";
 import { TooltipProvider } from "@/components/ui/tooltip";
 import { TelegramProvider } from "@/components/providers/TelegramProvider";
+import { AppShell } from "@/components/AppShell";
 import { AppErrorBoundary } from "@/components/AppErrorBoundary";
+import { THEME_BOOTSTRAP_SCRIPT } from "@/lib/theme-bootstrap-script";
 import "./globals.css";
 
 export const metadata: Metadata = {
@@ -23,12 +25,7 @@ export default function RootLayout({
   return (
     <html lang="en" data-theme="dark" suppressHydrationWarning>
       <head>
-        {/* Inline script: theme from hash (tgWebAppColorScheme + all 14 TG themeParams → --tg-theme-*), then data-theme and Mini App colors. */}
-        <script
-          dangerouslySetInnerHTML={{
-            __html: `(function(){var scheme='dark';var root=document.documentElement;var hash=typeof location!=='undefined'&&location.hash?location.hash.slice(1):'';if(hash){var params={};hash.split('&').forEach(function(p){var i=p.indexOf('=');if(i===-1)return;var k=decodeURIComponent(p.slice(0,i));var v=p.slice(i+1);params[k]=v;});if(params.tgWebAppColorScheme==='light'||params.tgWebAppColorScheme==='dark')scheme=params.tgWebAppColorScheme;if(params.tgWebAppThemeParams){try{var theme=JSON.parse(decodeURIComponent(params.tgWebAppThemeParams));var tgKeys=['bg_color','text_color','hint_color','link_color','button_color','button_text_color','secondary_bg_color','header_bg_color','accent_text_color','destructive_text_color','section_bg_color','section_header_text_color','section_separator_color','subtitle_text_color','bottom_bar_bg_color'];tgKeys.forEach(function(k){var v=theme[k];if(v&&typeof v==='string')root.style.setProperty('--tg-theme-'+k.replace(/_/g,'-'),v);});Object.keys(theme).forEach(function(k){var v=theme[k];if(v&&typeof v==='string')root.style.setProperty('--tg-theme-'+k.replace(/_/g,'-'),v);});}catch(e){}}}var twa=typeof window!=='undefined'&&window.Telegram&&window.Telegram.WebApp;if(scheme!=='light'&&scheme!=='dark'&&twa&&(twa.colorScheme==='light'||twa.colorScheme==='dark'))scheme=twa.colorScheme;if(scheme!=='light'&&scheme!=='dark'){try{var s=getComputedStyle(root).getPropertyValue('--tg-color-scheme').trim();if(s==='light'||s==='dark')scheme=s;}catch(e){} }if(scheme!=='light'&&scheme!=='dark')scheme=window.matchMedia&&window.matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light';root.setAttribute('data-theme',scheme);if(twa){if(twa.setBackgroundColor)twa.setBackgroundColor('bg_color');if(twa.setHeaderColor)twa.setHeaderColor('bg_color');}})();`,
-          }}
-        />
+        <script dangerouslySetInnerHTML={{ __html: THEME_BOOTSTRAP_SCRIPT }} />
         <script
           dangerouslySetInnerHTML={{
             __html: `(function(){if(typeof window!=='undefined'&&window.__DT_LANG==null)window.__DT_LANG='en';})();`,
@@ -39,7 +36,9 @@ export default function RootLayout({
       <body className="antialiased">
         <TelegramProvider>
           <AppErrorBoundary>
-            <TooltipProvider>{children}</TooltipProvider>
+            <TooltipProvider>
+              <AppShell>{children}</AppShell>
+            </TooltipProvider>
           </AppErrorBoundary>
         </TelegramProvider>
       </body>
diff --git a/webapp-next/src/app/not-found.tsx b/webapp-next/src/app/not-found.tsx
index 061f4d7..abf872b 100644
--- a/webapp-next/src/app/not-found.tsx
+++ b/webapp-next/src/app/not-found.tsx
@@ -5,21 +5,31 @@
 
 "use client";
 
+import { useEffect } from "react";
 import Link from "next/link";
 import { useTranslation } from "@/i18n/use-translation";
+import { useAppStore } from "@/store/app-store";
+import { Button } from "@/components/ui/button";
+import { FullScreenStateShell } from "@/components/states/FullScreenStateShell";
 
 export default function NotFound() {
   const { t } = useTranslation();
+  const setAppContentReady = useAppStore((s) => s.setAppContentReady);
+
+  useEffect(() => {
+    setAppContentReady(true);
+  }, [setAppContentReady]);
+
   return (
-    <div className="flex min-h-[var(--tg-viewport-stable-height,100vh)] flex-col items-center justify-center gap-4 bg-background px-4 text-foreground">
-      <h1 className="text-xl font-semibold">{t("not_found.title")}</h1>
-      <p className="text-muted-foreground">{t("not_found.description")}</p>
-      <Link
-        href="/"
-        className="rounded-lg bg-primary px-4 py-2 text-primary-foreground hover:bg-primary/90"
-      >
-        {t("not_found.open_calendar")}
-      </Link>
-    </div>
+    <FullScreenStateShell
+      title={t("not_found.title")}
+      description={t("not_found.description")}
+      primaryAction={
+        <Button asChild>
+          <Link href="/">{t("not_found.open_calendar")}</Link>
+        </Button>
+      }
+      role="status"
+    />
   );
 }
diff --git a/webapp-next/src/app/page.test.tsx b/webapp-next/src/app/page.test.tsx
index bfb7eb0..9c86f49 100644
--- a/webapp-next/src/app/page.test.tsx
+++ b/webapp-next/src/app/page.test.tsx
@@ -4,10 +4,9 @@
  */
 
 import { describe, it, expect, beforeEach, vi } from "vitest";
-import { render, screen, waitFor, act } from "@testing-library/react";
+import { render, screen, act } from "@testing-library/react";
 import Page from "./page";
 import { resetAppStore } from "@/test/test-utils";
-import { useAppStore } from "@/store/app-store";
 import { useTelegramAuth } from "@/hooks/use-telegram-auth";
 
 vi.mock("next/navigation", () => ({
@@ -41,22 +40,6 @@ describe("Page", () => {
     expect(screen.getByRole("button", { name: /next month/i })).toBeInTheDocument();
   });
 
-  it("sets document title and lang from store lang", async () => {
-    useAppStore.getState().setLang("en");
-    render(<Page />);
-    await screen.findByRole("grid", { name: "Calendar" });
-    expect(document.title).toBe("Duty Calendar");
-    expect(document.documentElement.lang).toBe("en");
-  });
-
-  it("sets document title for ru when store lang is ru", async () => {
-    useAppStore.getState().setLang("ru");
-    render(<Page />);
-    await screen.findByRole("grid", { name: "Calendar" });
-    expect(document.title).toBe("Календарь дежурств");
-    expect(document.documentElement.lang).toBe("ru");
-  });
-
   it("renders AccessDeniedScreen when not allowed and delay has passed", async () => {
     const { RETRY_DELAY_MS } = await import("@/lib/constants");
     vi.mocked(useTelegramAuth).mockReturnValue({
diff --git a/webapp-next/src/app/page.tsx b/webapp-next/src/app/page.tsx
index 46d73a6..03eff0d 100644
--- a/webapp-next/src/app/page.tsx
+++ b/webapp-next/src/app/page.tsx
@@ -8,10 +8,8 @@
 import { useCallback, useEffect } from "react";
 import { useAppStore, type AppState } from "@/store/app-store";
 import { useShallow } from "zustand/react/shallow";
-import { useTelegramTheme } from "@/hooks/use-telegram-theme";
 import { useTelegramAuth } from "@/hooks/use-telegram-auth";
 import { useAppInit } from "@/hooks/use-app-init";
-import { callMiniAppReadyOnce } from "@/lib/telegram-ready";
 import { fetchAdminMe } from "@/lib/api";
 import { getLang } from "@/i18n/messages";
 import { AccessDeniedScreen } from "@/components/states/AccessDeniedScreen";
@@ -19,8 +17,6 @@ import { CurrentDutyView } from "@/components/current-duty/CurrentDutyView";
 import { CalendarPage } from "@/components/CalendarPage";
 
 export default function Home() {
-  useTelegramTheme();
-
   const { initDataRaw, startParam, isLocalhost } = useTelegramAuth();
   const isAllowed = isLocalhost || !!initDataRaw;
 
@@ -35,7 +31,7 @@ export default function Home() {
     fetchAdminMe(initDataRaw, getLang()).then(({ is_admin }) => setIsAdmin(is_admin));
   }, [isAllowed, initDataRaw, setIsAdmin]);
 
-  const { accessDenied, currentView, setCurrentView, setSelectedDay, appContentReady } =
+  const { accessDenied, currentView, setCurrentView, setSelectedDay, appContentReady, setAppContentReady } =
     useAppStore(
       useShallow((s: AppState) => ({
         accessDenied: s.accessDenied,
@@ -43,15 +39,16 @@ export default function Home() {
         setCurrentView: s.setCurrentView,
         setSelectedDay: s.setSelectedDay,
         appContentReady: s.appContentReady,
+        setAppContentReady: s.setAppContentReady,
       }))
     );
 
-  // When content is ready, tell Telegram to hide native loading and show our app.
+  // When showing access-denied or current-duty view, mark content ready so ReadyGate can call miniAppReady().
   useEffect(() => {
-    if (appContentReady) {
-      callMiniAppReadyOnce();
+    if (accessDenied || currentView === "currentDuty") {
+      setAppContentReady(true);
     }
-  }, [appContentReady]);
+  }, [accessDenied, currentView, setAppContentReady]);
 
   const handleBackFromCurrentDuty = useCallback(() => {
     setCurrentView("calendar");
@@ -59,7 +56,9 @@ export default function Home() {
   }, [setCurrentView, setSelectedDay]);
 
   const content = accessDenied ? (
-    <AccessDeniedScreen primaryAction="reload" />
+    <div className="content-safe mx-auto flex min-h-[var(--tg-viewport-stable-height,100vh)] w-full max-w-[var(--max-width-app)] flex-col bg-background px-3 pb-6">
+      <AccessDeniedScreen primaryAction="reload" />
+    </div>
   ) : currentView === "currentDuty" ? (
     <div className="content-safe mx-auto flex min-h-[var(--tg-viewport-stable-height,100vh)] w-full max-w-[var(--max-width-app)] flex-col bg-background px-3 pb-6">
       <CurrentDutyView
diff --git a/webapp-next/src/components/AppErrorBoundary.tsx b/webapp-next/src/components/AppErrorBoundary.tsx
index 26bfd29..7bab98e 100644
--- a/webapp-next/src/components/AppErrorBoundary.tsx
+++ b/webapp-next/src/components/AppErrorBoundary.tsx
@@ -7,9 +7,9 @@
 "use client";
 
 import React from "react";
-import { getLang } from "@/i18n/messages";
-import { translate } from "@/i18n/messages";
+import { getLang, translate } from "@/i18n/messages";
 import { Button } from "@/components/ui/button";
+import { FullScreenStateShell } from "@/components/states/FullScreenStateShell";
 
 interface AppErrorBoundaryProps {
   children: React.ReactNode;
@@ -52,23 +52,18 @@ export class AppErrorBoundary extends React.Component<
     if (this.state.hasError) {
       const lang = getLang();
       const message = translate(lang, "error_boundary.message");
+      const description = translate(lang, "error_boundary.description");
       const reloadLabel = translate(lang, "error_boundary.reload");
       return (
-        <div
-          className="flex min-h-[200px] flex-col items-center justify-center gap-4 rounded-xl bg-surface py-8 px-4 text-center"
-          role="alert"
-        >
-          <p className="m-0 text-sm font-medium text-foreground">{message}</p>
-          <Button
-            type="button"
-            variant="default"
-            size="sm"
-            onClick={this.handleReload}
-            className="bg-primary text-primary-foreground hover:opacity-90"
-          >
-            {reloadLabel}
-          </Button>
-        </div>
+        <FullScreenStateShell
+          title={message}
+          description={description}
+          primaryAction={
+            <Button type="button" variant="default" onClick={this.handleReload}>
+              {reloadLabel}
+            </Button>
+          }
+        />
       );
     }
     return this.props.children;
diff --git a/webapp-next/src/components/AppShell.tsx b/webapp-next/src/components/AppShell.tsx
new file mode 100644
index 0000000..90a373b
--- /dev/null
+++ b/webapp-next/src/components/AppShell.tsx
@@ -0,0 +1,17 @@
+/**
+ * App shell: wraps children with ReadyGate so any route can trigger miniAppReady().
+ * Rendered inside TelegramProvider so theme and SDK are available.
+ */
+
+"use client";
+
+import { ReadyGate } from "@/components/ReadyGate";
+
+export function AppShell({ children }: { children: React.ReactNode }) {
+  return (
+    <>
+      <ReadyGate />
+      {children}
+    </>
+  );
+}
diff --git a/webapp-next/src/components/CalendarPage.tsx b/webapp-next/src/components/CalendarPage.tsx
index a3b79eb..46d0e51 100644
--- a/webapp-next/src/components/CalendarPage.tsx
+++ b/webapp-next/src/components/CalendarPage.tsx
@@ -171,7 +171,7 @@ export function CalendarPage({ isAllowed, initDataRaw }: CalendarPageProps) {
     <div className="content-safe mx-auto flex min-h-[var(--tg-viewport-stable-height,100vh)] w-full max-w-[var(--max-width-app)] flex-col bg-background px-3 pb-6">
       <div
         ref={calendarStickyRef}
-        className="sticky top-0 z-10 min-h-[var(--calendar-block-min-height)] bg-background pb-2"
+        className="sticky top-[var(--app-safe-top)] z-10 min-h-[var(--calendar-block-min-height)] bg-background pb-2 touch-pan-y"
       >
         <CalendarHeader
           month={currentMonth}
diff --git a/webapp-next/src/components/ReadyGate.tsx b/webapp-next/src/components/ReadyGate.tsx
new file mode 100644
index 0000000..945d221
--- /dev/null
+++ b/webapp-next/src/components/ReadyGate.tsx
@@ -0,0 +1,23 @@
+/**
+ * Route-agnostic gate: when appContentReady becomes true, calls miniAppReady() once
+ * so Telegram hides its native loader. Used in layout so any route (/, /admin, not-found,
+ * error) can trigger ready when its first screen is shown.
+ */
+
+"use client";
+
+import { useEffect } from "react";
+import { useAppStore } from "@/store/app-store";
+import { callMiniAppReadyOnce } from "@/lib/telegram-ready";
+
+export function ReadyGate() {
+  const appContentReady = useAppStore((s) => s.appContentReady);
+
+  useEffect(() => {
+    if (appContentReady) {
+      callMiniAppReadyOnce();
+    }
+  }, [appContentReady]);
+
+  return null;
+}
diff --git a/webapp-next/src/components/contact/ContactLinks.test.tsx b/webapp-next/src/components/contact/ContactLinks.test.tsx
index 244e07d..e38d04d 100644
--- a/webapp-next/src/components/contact/ContactLinks.test.tsx
+++ b/webapp-next/src/components/contact/ContactLinks.test.tsx
@@ -9,11 +9,15 @@ import { ContactLinks } from "./ContactLinks";
 import { resetAppStore } from "@/test/test-utils";
 
 const openPhoneLinkMock = vi.fn();
+const openTelegramProfileMock = vi.fn();
 const triggerHapticLightMock = vi.fn();
 
 vi.mock("@/lib/open-phone-link", () => ({
   openPhoneLink: (...args: unknown[]) => openPhoneLinkMock(...args),
 }));
+vi.mock("@/lib/telegram-link", () => ({
+  openTelegramProfile: (...args: unknown[]) => openTelegramProfileMock(...args),
+}));
 vi.mock("@/lib/telegram-haptic", () => ({
   triggerHapticLight: () => triggerHapticLightMock(),
 }));
@@ -22,6 +26,7 @@ describe("ContactLinks", () => {
   beforeEach(() => {
     resetAppStore();
     openPhoneLinkMock.mockClear();
+    openTelegramProfileMock.mockClear();
     triggerHapticLightMock.mockClear();
   });
 
@@ -82,4 +87,17 @@ describe("ContactLinks", () => {
     expect(openPhoneLinkMock).toHaveBeenCalledWith("+79991234567");
     expect(triggerHapticLightMock).toHaveBeenCalled();
   });
+
+  it("calls openTelegramProfile and triggerHapticLight when Telegram link is clicked", () => {
+    render(
+      <ContactLinks phone={null} username="alice_dev" showLabels={false} />
+    );
+    const tgLink = document.querySelector<HTMLAnchorElement>('a[href*="t.me"]');
+    expect(tgLink).toBeInTheDocument();
+
+    fireEvent.click(tgLink!);
+
+    expect(openTelegramProfileMock).toHaveBeenCalledWith("alice_dev");
+    expect(triggerHapticLightMock).toHaveBeenCalled();
+  });
 });
diff --git a/webapp-next/src/components/contact/ContactLinks.tsx b/webapp-next/src/components/contact/ContactLinks.tsx
index e1e12e5..faad19e 100644
--- a/webapp-next/src/components/contact/ContactLinks.tsx
+++ b/webapp-next/src/components/contact/ContactLinks.tsx
@@ -8,6 +8,7 @@
 import { useTranslation } from "@/i18n/use-translation";
 import { formatPhoneDisplay } from "@/lib/phone-format";
 import { openPhoneLink } from "@/lib/open-phone-link";
+import { openTelegramProfile } from "@/lib/telegram-link";
 import { triggerHapticLight } from "@/lib/telegram-haptic";
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
@@ -90,6 +91,11 @@ export function ContactLinks({
               target="_blank"
               rel="noopener noreferrer"
               aria-label={ariaTelegram}
+              onClick={(e) => {
+                e.preventDefault();
+                openTelegramProfile(cleanUsername);
+                triggerHapticLight();
+              }}
             >
               <TelegramIcon className="size-5" aria-hidden />
               <span>@{cleanUsername}</span>
@@ -131,6 +137,11 @@ export function ContactLinks({
   }
   if (hasUsername) {
     const href = `https://t.me/${encodeURIComponent(cleanUsername)}`;
+    const handleTelegramClick = (e: React.MouseEvent<HTMLAnchorElement>) => {
+      e.preventDefault();
+      openTelegramProfile(cleanUsername);
+      triggerHapticLight();
+    };
     const link = (
       <a
         key="tg"
@@ -139,6 +150,7 @@ export function ContactLinks({
         rel="noopener noreferrer"
         className={linkClass}
         aria-label={ariaTelegram}
+        onClick={handleTelegramClick}
       >
         @{cleanUsername}
       </a>
diff --git a/webapp-next/src/components/current-duty/CurrentDutyView.tsx b/webapp-next/src/components/current-duty/CurrentDutyView.tsx
index b2a0922..eb17b3c 100644
--- a/webapp-next/src/components/current-duty/CurrentDutyView.tsx
+++ b/webapp-next/src/components/current-duty/CurrentDutyView.tsx
@@ -340,13 +340,12 @@ export function CurrentDutyView({ onBack, openedFromPin = false }: CurrentDutyVi
           </section>
           <div
             className="rounded-lg bg-duty/10 px-3 py-2.5 flex flex-col gap-1"
-            aria-live="polite"
-            aria-atomic="true"
+            aria-label={t("current_duty.remaining_label")}
           >
             <span className="text-xs text-muted-foreground">
               {t("current_duty.remaining_label")}
             </span>
-            <span className="text-xl font-semibold text-foreground tabular-nums">
+            <span className="text-xl font-semibold text-foreground tabular-nums" aria-hidden>
               {remainingValueStr}
             </span>
             <span className="text-xs text-muted-foreground">
diff --git a/webapp-next/src/components/providers/TelegramProvider.tsx b/webapp-next/src/components/providers/TelegramProvider.tsx
index 199df94..18571c9 100644
--- a/webapp-next/src/components/providers/TelegramProvider.tsx
+++ b/webapp-next/src/components/providers/TelegramProvider.tsx
@@ -10,7 +10,7 @@ import {
   bindViewportCssVars,
   unmountViewport,
 } from "@telegram-apps/sdk-react";
-import { fixSurfaceContrast } from "@/hooks/use-telegram-theme";
+import { fixSurfaceContrast, useTelegramTheme } from "@/hooks/use-telegram-theme";
 import { applyAndroidPerformanceClass } from "@/lib/telegram-android-perf";
 import { useAppStore } from "@/store/app-store";
 import { getLang } from "@/i18n/messages";
@@ -42,6 +42,15 @@ export function useTelegramSdkReady(): TelegramSdkContextValue {
  * useTelegramTheme() in the app handles ongoing theme changes.
  * Syncs lang from window.__DT_LANG on mount and when config.js fires dt-config-loaded.
  */
+/**
+ * Live theme sync: provider-owned so every route (/, /admin, not-found, error) gets
+ * data-theme and Mini App chrome color updates when Telegram theme changes.
+ */
+function ThemeSync() {
+  useTelegramTheme();
+  return null;
+}
+
 export function TelegramProvider({
   children,
 }: {
@@ -111,6 +120,7 @@ export function TelegramProvider({
 
   return (
     <TelegramSdkContext.Provider value={{ sdkReady }}>
+      <ThemeSync />
       {children}
     </TelegramSdkContext.Provider>
   );
diff --git a/webapp-next/src/components/states/AccessDeniedScreen.tsx b/webapp-next/src/components/states/AccessDeniedScreen.tsx
index e9d0e28..b546ac9 100644
--- a/webapp-next/src/components/states/AccessDeniedScreen.tsx
+++ b/webapp-next/src/components/states/AccessDeniedScreen.tsx
@@ -9,6 +9,8 @@ import { useEffect } from "react";
 import { getLang, translate } from "@/i18n/messages";
 import { useAppStore } from "@/store/app-store";
 import { triggerHapticLight } from "@/lib/telegram-haptic";
+import { Button } from "@/components/ui/button";
+import { FullScreenStateShell } from "@/components/states/FullScreenStateShell";
 
 export interface AccessDeniedScreenProps {
   /** Optional detail from API 403 response, shown below the hint. */
@@ -59,28 +61,20 @@ export function AccessDeniedScreen({
         : translate(lang, "current_duty.back");
 
   return (
-    <div
-      className="flex min-h-[var(--tg-viewport-stable-height,100vh)] flex-col items-center justify-center gap-4 bg-background px-4 text-foreground"
-      role="alert"
+    <FullScreenStateShell
+      title={translate(lang, "access_denied")}
+      description={translate(lang, "access_denied.hint")}
+      primaryAction={
+        <Button type="button" onClick={handleClick}>
+          {buttonLabel}
+        </Button>
+      }
     >
-      <h1 className="text-xl font-semibold">
-        {translate(lang, "access_denied")}
-      </h1>
-      <p className="text-center text-muted-foreground">
-        {translate(lang, "access_denied.hint")}
-      </p>
       {hasDetail && (
         <p className="text-center text-sm text-muted-foreground">
           {serverDetail}
         </p>
       )}
-      <button
-        type="button"
-        onClick={handleClick}
-        className="rounded-lg bg-primary px-4 py-2 text-primary-foreground hover:bg-primary/90"
-      >
-        {buttonLabel}
-      </button>
-    </div>
+    </FullScreenStateShell>
   );
 }
diff --git a/webapp-next/src/components/states/FullScreenStateShell.tsx b/webapp-next/src/components/states/FullScreenStateShell.tsx
new file mode 100644
index 0000000..328aa73
--- /dev/null
+++ b/webapp-next/src/components/states/FullScreenStateShell.tsx
@@ -0,0 +1,51 @@
+/**
+ * Shared full-screen state layout for fallback screens (access denied, not-found, error).
+ * Uses content-safe, app tokens, and consistent spacing so all fallback screens look like the same app.
+ */
+
+"use client";
+
+export interface FullScreenStateShellProps {
+  /** Main heading (e.g. "Access denied", "Page not found"). */
+  title: React.ReactNode;
+  /** Optional description or message below the title. */
+  description?: React.ReactNode;
+  /** Optional extra content (e.g. server detail, secondary text). */
+  children?: React.ReactNode;
+  /** Primary action (Button or Link). */
+  primaryAction: React.ReactNode;
+  /** Wrapper role. Default "alert" for error/denied states. */
+  role?: "alert" | "status";
+  /** Optional extra class names for the wrapper. */
+  className?: string;
+}
+
+const WRAPPER_CLASS =
+  "content-safe flex min-h-[var(--tg-viewport-stable-height,100vh)] flex-col items-center justify-center gap-4 bg-background px-4 text-foreground";
+
+/**
+ * Full-screen centered shell with title, optional description, and primary action.
+ * Use for access denied, not-found, and in-app error boundary screens.
+ */
+export function FullScreenStateShell({
+  title,
+  description,
+  children,
+  primaryAction,
+  role = "alert",
+  className,
+}: FullScreenStateShellProps) {
+  return (
+    <div
+      className={className ? `${WRAPPER_CLASS} ${className}` : WRAPPER_CLASS}
+      role={role}
+    >
+      <h1 className="text-xl font-semibold">{title}</h1>
+      {description != null && (
+        <p className="text-center text-muted-foreground">{description}</p>
+      )}
+      {children}
+      {primaryAction}
+    </div>
+  );
+}
diff --git a/webapp-next/src/hooks/use-app-init.ts b/webapp-next/src/hooks/use-app-init.ts
index d288b77..542dbcf 100644
--- a/webapp-next/src/hooks/use-app-init.ts
+++ b/webapp-next/src/hooks/use-app-init.ts
@@ -1,13 +1,12 @@
 /**
- * Application initialization: language sync, access-denied logic, deep link routing.
- * Runs effects that depend on Telegram auth (isAllowed, startParam); caller provides those.
+ * Application initialization: access-denied logic and deep link routing.
+ * Document lang/title are owned by TelegramProvider (all routes).
  */
 
 "use client";
 
 import { useEffect } from "react";
 import { useAppStore } from "@/store/app-store";
-import { useTranslation } from "@/i18n/use-translation";
 import { RETRY_DELAY_MS } from "@/lib/constants";
 
 export interface UseAppInitParams {
@@ -18,23 +17,12 @@ export interface UseAppInitParams {
 }
 
 /**
- * Applies document lang/title from store (when this hook runs, e.g. main page).
  * Handles access denied when not allowed and routes to current duty view when opened via startParam=duty.
- * Language is synced from window.__DT_LANG in TelegramProvider (all routes).
  */
 export function useAppInit({ isAllowed, startParam }: UseAppInitParams): void {
-  const lang = useAppStore((s) => s.lang);
   const setAccessDenied = useAppStore((s) => s.setAccessDenied);
   const setLoading = useAppStore((s) => s.setLoading);
   const setCurrentView = useAppStore((s) => s.setCurrentView);
-  const { t } = useTranslation();
-
-  // Apply lang to document (title and html lang) when main page is mounted (tests render Page without TelegramProvider).
-  useEffect(() => {
-    if (typeof document === "undefined") return;
-    document.documentElement.lang = lang;
-    document.title = t("app.title");
-  }, [lang, t]);
 
   // When not allowed (no initData and not localhost), show access denied after delay.
   useEffect(() => {
diff --git a/webapp-next/src/hooks/use-auto-refresh.test.ts b/webapp-next/src/hooks/use-auto-refresh.test.ts
new file mode 100644
index 0000000..9fc1d13
--- /dev/null
+++ b/webapp-next/src/hooks/use-auto-refresh.test.ts
@@ -0,0 +1,42 @@
+/**
+ * Unit tests for useAutoRefresh: no immediate refresh (avoids duplicate first fetch).
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { renderHook } from "@testing-library/react";
+import { useAutoRefresh } from "./use-auto-refresh";
+
+describe("useAutoRefresh", () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("does not call refresh immediately when isCurrentMonth is true", () => {
+    const refresh = vi.fn();
+    renderHook(() => useAutoRefresh(refresh, true));
+
+    expect(refresh).not.toHaveBeenCalled();
+  });
+
+  it("calls refresh on interval when isCurrentMonth is true", () => {
+    const refresh = vi.fn();
+    renderHook(() => useAutoRefresh(refresh, true));
+
+    vi.advanceTimersByTime(60_000);
+    expect(refresh).toHaveBeenCalledTimes(1);
+    vi.advanceTimersByTime(60_000);
+    expect(refresh).toHaveBeenCalledTimes(2);
+  });
+
+  it("does not call refresh when isCurrentMonth is false", () => {
+    const refresh = vi.fn();
+    renderHook(() => useAutoRefresh(refresh, false));
+
+    vi.advanceTimersByTime(120_000);
+    expect(refresh).not.toHaveBeenCalled();
+  });
+});
diff --git a/webapp-next/src/hooks/use-auto-refresh.ts b/webapp-next/src/hooks/use-auto-refresh.ts
index 7181eff..4697d4f 100644
--- a/webapp-next/src/hooks/use-auto-refresh.ts
+++ b/webapp-next/src/hooks/use-auto-refresh.ts
@@ -10,7 +10,8 @@ import { useEffect, useRef } from "react";
 const AUTO_REFRESH_INTERVAL_MS = 60000;
 
 /**
- * When isCurrentMonth is true, calls refresh() immediately, then every 60 seconds.
+ * When isCurrentMonth is true, starts a 60-second interval to refresh. Does not call refresh()
+ * immediately so the initial load is handled only by useMonthData (avoids duplicate first fetch).
  * When isCurrentMonth becomes false or on unmount, the interval is cleared.
  */
 export function useAutoRefresh(
@@ -22,7 +23,6 @@ export function useAutoRefresh(
 
   useEffect(() => {
     if (!isCurrentMonth) return;
-    refreshRef.current();
     const id = setInterval(() => refreshRef.current(), AUTO_REFRESH_INTERVAL_MS);
     return () => clearInterval(id);
   }, [isCurrentMonth]);
diff --git a/webapp-next/src/hooks/use-swipe.ts b/webapp-next/src/hooks/use-swipe.ts
index f93ae6d..4f40707 100644
--- a/webapp-next/src/hooks/use-swipe.ts
+++ b/webapp-next/src/hooks/use-swipe.ts
@@ -1,6 +1,6 @@
 /**
  * Touch swipe detection for horizontal month navigation.
- * Replaces swipe logic from webapp/js/main.js (threshold 50px).
+ * Tracks move/cancel so diagonal or vertical scroll does not trigger month change.
  */
 
 "use client";
@@ -15,8 +15,9 @@ export interface UseSwipeOptions {
 }
 
 /**
- * Attaches touchstart/touchend to the element ref and invokes onSwipeLeft or onSwipeRight
- * when a horizontal swipe exceeds the threshold. Vertical swipes are ignored.
+ * Attaches touchstart/touchmove/touchend to the element ref. Fires onSwipeLeft or onSwipeRight
+ * only when horizontal movement exceeds threshold and dominates over vertical (no cancel during move).
+ * Use touch-action: pan-y on the swipe area so vertical scroll is preserved and horizontal intent is clearer.
  */
 export function useSwipe(
   elementRef: React.RefObject<HTMLElement | null>,
@@ -27,6 +28,7 @@ export function useSwipe(
   const { threshold = 50, disabled = false } = options;
   const startX = useRef(0);
   const startY = useRef(0);
+  const cancelledRef = useRef(false);
   const onSwipeLeftRef = useRef(onSwipeLeft);
   const onSwipeRightRef = useRef(onSwipeRight);
   onSwipeLeftRef.current = onSwipeLeft;
@@ -41,10 +43,21 @@ export function useSwipe(
       const t = e.changedTouches[0];
       startX.current = t.clientX;
       startY.current = t.clientY;
+      cancelledRef.current = false;
+    };
+
+    const handleMove = (e: TouchEvent) => {
+      if (e.changedTouches.length === 0 || cancelledRef.current) return;
+      const t = e.changedTouches[0];
+      const deltaX = Math.abs(t.clientX - startX.current);
+      const deltaY = Math.abs(t.clientY - startY.current);
+      if (deltaY > deltaX) {
+        cancelledRef.current = true;
+      }
     };
 
     const handleEnd = (e: TouchEvent) => {
-      if (e.changedTouches.length === 0) return;
+      if (e.changedTouches.length === 0 || cancelledRef.current) return;
       const t = e.changedTouches[0];
       const deltaX = t.clientX - startX.current;
       const deltaY = t.clientY - startY.current;
@@ -58,9 +71,11 @@ export function useSwipe(
     };
 
     el.addEventListener("touchstart", handleStart, { passive: true });
+    el.addEventListener("touchmove", handleMove, { passive: true });
     el.addEventListener("touchend", handleEnd, { passive: true });
     return () => {
       el.removeEventListener("touchstart", handleStart);
+      el.removeEventListener("touchmove", handleMove);
       el.removeEventListener("touchend", handleEnd);
     };
   }, [elementRef, disabled, threshold]);
diff --git a/webapp-next/src/lib/telegram-link.test.ts b/webapp-next/src/lib/telegram-link.test.ts
new file mode 100644
index 0000000..2affa1d
--- /dev/null
+++ b/webapp-next/src/lib/telegram-link.test.ts
@@ -0,0 +1,60 @@
+/**
+ * Unit tests for openTelegramProfile: Mini App–friendly Telegram link opening.
+ */
+
+import { describe, it, expect, vi, beforeEach } from "vitest";
+
+const openTelegramLinkMock = vi.fn();
+const isAvailableFn = vi.fn().mockReturnValue(true);
+
+vi.mock("@telegram-apps/sdk-react", () => ({
+  openTelegramLink: Object.assign(openTelegramLinkMock, {
+    isAvailable: () => isAvailableFn(),
+  }),
+}));
+
+describe("openTelegramProfile", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    isAvailableFn.mockReturnValue(true);
+  });
+
+  it("calls openTelegramLink with t.me URL when SDK is available", async () => {
+    const { openTelegramProfile } = await import("./telegram-link");
+
+    openTelegramProfile("alice");
+    expect(openTelegramLinkMock).toHaveBeenCalledWith("https://t.me/alice");
+  });
+
+  it("strips leading @ from username", async () => {
+    const { openTelegramProfile } = await import("./telegram-link");
+
+    openTelegramProfile("@bob");
+    expect(openTelegramLinkMock).toHaveBeenCalledWith("https://t.me/bob");
+  });
+
+  it("does nothing when username is empty", async () => {
+    const { openTelegramProfile } = await import("./telegram-link");
+
+    openTelegramProfile("");
+    openTelegramProfile(null);
+    openTelegramProfile(undefined);
+    expect(openTelegramLinkMock).not.toHaveBeenCalled();
+  });
+
+  it("falls back to window.open when SDK is unavailable", async () => {
+    isAvailableFn.mockReturnValue(false);
+    const openSpy = vi.spyOn(window, "open").mockImplementation(() => null);
+    vi.resetModules();
+    const { openTelegramProfile } = await import("./telegram-link");
+
+    openTelegramProfile("alice");
+
+    expect(openSpy).toHaveBeenCalledWith(
+      "https://t.me/alice",
+      "_blank",
+      "noopener,noreferrer"
+    );
+    openSpy.mockRestore();
+  });
+});
diff --git a/webapp-next/src/lib/telegram-link.ts b/webapp-next/src/lib/telegram-link.ts
new file mode 100644
index 0000000..2ae6a67
--- /dev/null
+++ b/webapp-next/src/lib/telegram-link.ts
@@ -0,0 +1,28 @@
+/**
+ * Opens a Telegram profile (t.me/username) in a Mini App–friendly way.
+ * Uses SDK openTelegramLink() when available so the link opens inside Telegram;
+ * otherwise falls back to window.open.
+ */
+
+import { openTelegramLink } from "@telegram-apps/sdk-react";
+
+/**
+ * Opens the given Telegram username profile. When running inside the Mini App,
+ * uses openTelegramLink() so the link opens in-app; otherwise opens in a new tab.
+ * Safe to call from click handlers; does not throw.
+ */
+export function openTelegramProfile(username: string | null | undefined): void {
+  const clean = username ? String(username).trim().replace(/^@+/, "") : "";
+  if (!clean) return;
+  if (typeof window === "undefined") return;
+  const url = `https://t.me/${encodeURIComponent(clean)}`;
+  try {
+    if (openTelegramLink.isAvailable()) {
+      openTelegramLink(url);
+      return;
+    }
+  } catch {
+    // SDK not available or not in Mini App context.
+  }
+  window.open(url, "_blank", "noopener,noreferrer");
+}
diff --git a/webapp-next/src/lib/theme-bootstrap-script.ts b/webapp-next/src/lib/theme-bootstrap-script.ts
new file mode 100644
index 0000000..3fbdb74
--- /dev/null
+++ b/webapp-next/src/lib/theme-bootstrap-script.ts
@@ -0,0 +1,7 @@
+/**
+ * Inline script for first-paint theme: hash (tgWebAppColorScheme + themeParams),
+ * then Telegram WebApp, then CSS --tg-color-scheme, then prefers-color-scheme.
+ * Sets data-theme and Mini App bg/header colors. Shared by layout and global-error.
+ */
+export const THEME_BOOTSTRAP_SCRIPT =
+  "(function(){var scheme='dark';var root=document.documentElement;var hash=typeof location!=='undefined'&&location.hash?location.hash.slice(1):'';if(hash){var params={};hash.split('&').forEach(function(p){var i=p.indexOf('=');if(i===-1)return;var k=decodeURIComponent(p.slice(0,i));var v=p.slice(i+1);params[k]=v;});if(params.tgWebAppColorScheme==='light'||params.tgWebAppColorScheme==='dark')scheme=params.tgWebAppColorScheme;if(params.tgWebAppThemeParams){try{var theme=JSON.parse(decodeURIComponent(params.tgWebAppThemeParams));var tgKeys=['bg_color','text_color','hint_color','link_color','button_color','button_text_color','secondary_bg_color','header_bg_color','accent_text_color','destructive_text_color','section_bg_color','section_header_text_color','section_separator_color','subtitle_text_color','bottom_bar_bg_color'];tgKeys.forEach(function(k){var v=theme[k];if(v&&typeof v==='string')root.style.setProperty('--tg-theme-'+k.replace(/_/g,'-'),v);});Object.keys(theme).forEach(function(k){var v=theme[k];if(v&&typeof v==='string')root.style.setProperty('--tg-theme-'+k.replace(/_/g,'-'),v);});}catch(e){}}}var twa=typeof window!=='undefined'&&window.Telegram&&window.Telegram.WebApp;if(scheme!=='light'&&scheme!=='dark'&&twa&&(twa.colorScheme==='light'||twa.colorScheme==='dark'))scheme=twa.colorScheme;if(scheme!=='light'&&scheme!=='dark'){try{var s=getComputedStyle(root).getPropertyValue('--tg-color-scheme').trim();if(s==='light'||s==='dark')scheme=s;}catch(e){} }if(scheme!=='light'&&scheme!=='dark')scheme=window.matchMedia&&window.matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light';root.setAttribute('data-theme',scheme);if(twa){if(twa.setBackgroundColor)twa.setBackgroundColor('bg_color');if(twa.setHeaderColor)twa.setHeaderColor('bg_color');}})();";