fix(web): notification media preview and theme switching

- show media labels instead of raw URLs in browser notifications

- support notification icon preview for image messages

- implement effective light/dark/system theme application

- apply appearance prefs on app startup

web/src/app/App.tsx

@@ -5,6 +5,7 @@ import { AuthPage } from "../pages/AuthPage";
 import { ChatsPage } from "../pages/ChatsPage";
 import { useAuthStore } from "../store/authStore";
 import { useChatStore } from "../store/chatStore";
+import { applyAppearancePreferences, getAppPreferences } from "../utils/preferences";
 
 const PENDING_INVITE_TOKEN_KEY = "bm_pending_invite_token";
 
@@ -18,6 +19,10 @@ export function App() {
   const setActiveChatId = useChatStore((s) => s.setActiveChatId);
   const [joiningInvite, setJoiningInvite] = useState(false);
 
+  useEffect(() => {
+    applyAppearancePreferences(getAppPreferences());
+  }, []);
+
   useEffect(() => {
     if (!accessToken) {
       return;

web/src/hooks/useRealtime.ts

@@ -255,9 +255,10 @@ function maybeShowBrowserNotification(chatId: number, message: Message, activeCh
     return;
   }
   const title = chat?.display_title || chat?.title || "New message";
-  const body = prefs.messagePreview ? (message.text?.trim() || messagePreviewByType(message.type)) : "New message";
+  const preview = buildNotificationPreview(message, prefs.messagePreview);
   const notification = new Notification(title, {
-    body,
+    body: preview.body,
+    icon: preview.image,
     tag: `chat-${chatId}`,
   });
   notification.onclick = () => {
@@ -278,3 +279,33 @@ function messagePreviewByType(type: Message["type"]): string {
   if (type === "circle_video") return "Video message";
   return "New message";
 }
+
+function buildNotificationPreview(
+  message: Message,
+  withPreview: boolean
+): { body: string; image?: string } {
+  if (!withPreview) {
+    return { body: "New message" };
+  }
+  if (message.type !== "text") {
+    if (message.type === "image") {
+      const imageUrl = typeof message.text === "string" && isLikelyUrl(message.text) ? message.text : undefined;
+      return { body: "🖼 Photo", image: imageUrl };
+    }
+    return { body: messagePreviewByType(message.type) };
+  }
+  const text = message.text?.trim();
+  if (!text) {
+    return { body: "New message" };
+  }
+  return { body: text };
+}
+
+function isLikelyUrl(value: string): boolean {
+  try {
+    const parsed = new URL(value);
+    return parsed.protocol === "http:" || parsed.protocol === "https:";
+  } catch {
+    return false;
+  }
+}

web/src/index.css

@@ -4,6 +4,16 @@
 @tailwind components;
 @tailwind utilities;
 
+:root {
+  --bm-font-size: 16px;
+  --bm-bg-primary: #101e30;
+  --bm-bg-secondary: #162233;
+  --bm-bg-tertiary: #19283a;
+  --bm-text-color: #e5edf9;
+  --bm-panel-bg: rgba(19, 31, 47, 0.9);
+  --bm-panel-border: rgba(146, 174, 208, 0.14);
+}
+
 html,
 body,
 #root {
@@ -17,8 +27,8 @@ body {
   background:
     radial-gradient(circle at 22% 18%, rgba(36, 68, 117, 0.35), transparent 26%),
     radial-gradient(circle at 82% 12%, rgba(24, 95, 102, 0.25), transparent 30%),
-    linear-gradient(180deg, #101e30 0%, #162233 55%, #19283a 100%);
-  color: #e5edf9;
+    linear-gradient(180deg, var(--bm-bg-primary) 0%, var(--bm-bg-secondary) 55%, var(--bm-bg-tertiary) 100%);
+  color: var(--bm-text-color);
 }
 
 * {
@@ -26,8 +36,8 @@ body {
 }
 
 .tg-panel {
-  background: rgba(19, 31, 47, 0.9);
-  border: 1px solid rgba(146, 174, 208, 0.14);
+  background: var(--bm-panel-bg);
+  border: 1px solid var(--bm-panel-border);
   backdrop-filter: blur(8px);
 }
 
@@ -46,3 +56,47 @@ body {
   background: rgba(126, 159, 201, 0.35);
   border-radius: 999px;
 }
+
+html[data-theme="light"] {
+  --bm-bg-primary: #eef3fb;
+  --bm-bg-secondary: #f5f8fd;
+  --bm-bg-tertiary: #ffffff;
+  --bm-text-color: #0f172a;
+  --bm-panel-bg: rgba(255, 255, 255, 0.93);
+  --bm-panel-border: rgba(15, 23, 42, 0.12);
+}
+
+html[data-theme="light"] .tg-chat-wallpaper {
+  background:
+    radial-gradient(circle at 14% 18%, rgba(59, 130, 246, 0.08), transparent 30%),
+    radial-gradient(circle at 86% 74%, rgba(34, 197, 94, 0.06), transparent 33%),
+    linear-gradient(160deg, rgba(15, 23, 42, 0.01) 0%, rgba(15, 23, 42, 0.02) 100%);
+}
+
+html[data-theme="light"] .bg-slate-900\/95,
+html[data-theme="light"] .bg-slate-900\/90,
+html[data-theme="light"] .bg-slate-900\/80,
+html[data-theme="light"] .bg-slate-900\/70,
+html[data-theme="light"] .bg-slate-900\/60,
+html[data-theme="light"] .bg-slate-900,
+html[data-theme="light"] .bg-slate-800\/80,
+html[data-theme="light"] .bg-slate-800\/70,
+html[data-theme="light"] .bg-slate-800\/60,
+html[data-theme="light"] .bg-slate-800 {
+  background-color: rgba(255, 255, 255, 0.92) !important;
+}
+
+html[data-theme="light"] .border-slate-700\/80,
+html[data-theme="light"] .border-slate-700\/70,
+html[data-theme="light"] .border-slate-700\/60,
+html[data-theme="light"] .border-slate-700\/50,
+html[data-theme="light"] .border-slate-700 {
+  border-color: rgba(15, 23, 42, 0.14) !important;
+}
+
+html[data-theme="light"] .text-slate-100,
+html[data-theme="light"] .text-slate-200,
+html[data-theme="light"] .text-slate-300,
+html[data-theme="light"] .text-slate-400 {
+  color: #334155 !important;
+}

web/src/utils/preferences.ts

@@ -73,8 +73,20 @@ export function applyAppearancePreferences(prefs: AppPreferences): void {
   if (typeof document === "undefined") {
     return;
   }
+  const resolvedTheme = resolveTheme(prefs.theme);
   document.documentElement.style.setProperty("--bm-font-size", `${prefs.messageFontSize}px`);
-  document.documentElement.setAttribute("data-theme", prefs.theme);
+  document.documentElement.setAttribute("data-theme", resolvedTheme);
+  document.documentElement.setAttribute("data-theme-mode", prefs.theme);
+}
+
+function resolveTheme(theme: ThemeMode): "light" | "dark" {
+  if (theme === "light" || theme === "dark") {
+    return theme;
+  }
+  if (typeof window === "undefined") {
+    return "dark";
+  }
+  return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
 }
 
 function normalizeFontSize(value: number | undefined): number {
@@ -84,4 +96,3 @@ function normalizeFontSize(value: number | undefined): number {
   }
   return Math.max(12, Math.min(24, Math.round(input)));
 }
-