diff --git a/backend/app/main.py b/backend/app/main.py
index 0d0bec7..9ffbece 100755
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -7,6 +7,7 @@ import asyncio
 
 from fastapi import FastAPI, APIRouter, Request, Response
 from fastapi.middleware.cors import CORSMiddleware
+from prometheus_fastapi_instrumentator import Instrumentator
 
 from app.core.redis import close_redis, init_redis
 from app.users.router import router as user_router
@@ -51,7 +52,6 @@ async def get_file(filename: str):
     if filename.endswith(".png"):
         content_type = "image/png"
 
-    # Возвращаем файл напрямую из памяти
     return Response(
         content=file_data,
         media_type=content_type
@@ -61,6 +61,12 @@ app = FastAPI(
     description="## Backend messenger aether",
     lifespan=lifespan
 )
+
+Instrumentator().instrument(app).expose(
+    app,
+    endpoint="/api/v1/p2qNT2Cz/SGQmQ==",
+    include_in_schema=False
+)
 app.include_router(api_router)
 
 
diff --git a/backend/poetry.lock b/backend/poetry.lock
index 86a9e34..1043818 100755
--- a/backend/poetry.lock
+++ b/backend/poetry.lock
@@ -1681,6 +1681,39 @@ files = [
 dev = ["pre-commit", "tox"]
 testing = ["coverage", "pytest", "pytest-benchmark"]
 
+[[package]]
+name = "prometheus-client"
+version = "0.24.1"
+description = "Python client for the Prometheus monitoring system."
+optional = false
+python-versions = ">=3.9"
+groups = ["main"]
+files = [
+    {file = "prometheus_client-0.24.1-py3-none-any.whl", hash = "sha256:150db128af71a5c2482b36e588fc8a6b95e498750da4b17065947c16070f4055"},
+    {file = "prometheus_client-0.24.1.tar.gz", hash = "sha256:7e0ced7fbbd40f7b84962d5d2ab6f17ef88a72504dcf7c0b40737b43b2a461f9"},
+]
+
+[package.extras]
+aiohttp = ["aiohttp"]
+django = ["django"]
+twisted = ["twisted"]
+
+[[package]]
+name = "prometheus-fastapi-instrumentator"
+version = "7.1.0"
+description = "Instrument your FastAPI app with Prometheus metrics"
+optional = false
+python-versions = ">=3.8"
+groups = ["main"]
+files = [
+    {file = "prometheus_fastapi_instrumentator-7.1.0-py3-none-any.whl", hash = "sha256:978130f3c0bb7b8ebcc90d35516a6fe13e02d2eb358c8f83887cdef7020c31e9"},
+    {file = "prometheus_fastapi_instrumentator-7.1.0.tar.gz", hash = "sha256:be7cd61eeea4e5912aeccb4261c6631b3f227d8924542d79eaf5af3f439cbe5e"},
+]
+
+[package.dependencies]
+prometheus-client = ">=0.8.0,<1.0.0"
+starlette = ">=0.30.0,<1.0.0"
+
 [[package]]
 name = "prompt-toolkit"
 version = "3.0.52"
@@ -3841,4 +3874,4 @@ propcache = ">=0.2.1"
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.13"
-content-hash = "0bc3ba3c9bfed0b76ac6aa34c14882ea972d982a889c657d5c39d5c317df1775"
+content-hash = "7e4b0bc421fae38a72c65c92dad367b672b4cb7b6179059eac78773689af43db"
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index e724d34..6596b80 100755
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -22,7 +22,8 @@ dependencies = [
     "pytest (>=9.0.2,<10.0.0)",
     "aiobotocore (>=3.1.0,<4.0.0)",
     "types-aiobotocore[essential] (>=3.1.0,<4.0.0)",
-    "websockets (>=16.0,<17.0)"
+    "websockets (>=16.0,<17.0)",
+    "prometheus-fastapi-instrumentator (>=7.1.0,<8.0.0)"
 ]
 
 
diff --git a/frontend/src/pages/AuthPage.tsx b/frontend/src/pages/AuthPage.tsx
index 2b9a956..46ad6e5 100644
--- a/frontend/src/pages/AuthPage.tsx
+++ b/frontend/src/pages/AuthPage.tsx
@@ -8,7 +8,7 @@ export default function AuthPage() {
   const [isLogin, setIsLogin] = useState(true);
 
   return (
-    <div className="min-h-screen flex items-center justify-center p-4 relative" style={{ backgroundColor: '#F5F5F1' }}>
+    <div className="min-h-screen flex items-center justify-center p-3 md:p-4 relative" style={{ backgroundColor: '#F5F5F1' }}>
       {/* Subtle texture background */}
       <div className="absolute inset-0 opacity-30 pointer-events-none"
            style={{ 
@@ -23,19 +23,19 @@ export default function AuthPage() {
         animate={{ scale: 1, opacity: 1 }}
         transition={{ duration: 0.3 }}
       >
-        <div className="bg-card-white rounded-[32px] shadow-soft px-10 py-12">
+        <div className="bg-card-white rounded-[24px] md:rounded-[32px] shadow-soft px-6 md:px-10 py-8 md:py-12">
           {/* Logo */}
-          <div className="text-center mb-8">
-            <div className="auth-logo w-[100px] h-[100px] mx-auto mb-8 flex items-center justify-center">
+          <div className="text-center mb-6 md:mb-8">
+            <div className="auth-logo w-[80px] h-[80px] md:w-[100px] md:h-[100px] mx-auto mb-6 md:mb-8 flex items-center justify-center">
               <img src={miniLogo} alt="Aether Logo" className="w-full h-full object-contain" />
             </div>
-            <div className="font-lora text-accent-olive text-lg tracking-[2px] mb-6">
+            <div className="font-lora text-accent-olive text-base md:text-lg tracking-[2px] mb-4 md:mb-6">
               AETHER
             </div>
             <AnimatePresence mode="wait">
               <motion.h1 
                 key={isLogin ? 'login' : 'register'}
-                className="font-lora font-semibold text-[28px] text-text-main mb-2"
+                className="font-lora font-semibold text-2xl md:text-[28px] text-text-main mb-2"
                 initial={{ opacity: 0, y: -10 }}
                 animate={{ opacity: 1, y: 0 }}
                 exit={{ opacity: 0, y: 10 }}
diff --git a/frontend/src/pages/ChatPage.tsx b/frontend/src/pages/ChatPage.tsx
index 89bbcb0..31bae72 100644
--- a/frontend/src/pages/ChatPage.tsx
+++ b/frontend/src/pages/ChatPage.tsx
@@ -454,10 +454,12 @@ export default function ChatPage() {
   return (
     <div className="min-h-screen h-screen flex" style={{ backgroundColor: 'var(--bg-primary)' }}>
       {/* Sidebar */}
-      <div className="w-80 flex flex-col shadow-soft" style={{ backgroundColor: 'var(--bg-card)' }}>
+      <div className={`w-full md:w-80 flex flex-col shadow-soft ${
+        selectedChat ? 'hidden md:flex' : 'flex'
+      }`} style={{ backgroundColor: 'var(--bg-card)' }}>
         {/* Header */}
-        <div className="p-6 border-b" style={{ borderColor: 'var(--border-color)' }}>
-          <h1 className="text-3xl font-lora font-semibold text-center tracking-wider" style={{ color: 'var(--accent-primary)' }}>
+        <div className="p-4 md:p-6 border-b" style={{ borderColor: 'var(--border-color)' }}>
+          <h1 className="text-2xl md:text-3xl font-lora font-semibold text-center tracking-wider" style={{ color: 'var(--accent-primary)' }}>
             AETHER
           </h1>
         </div>
@@ -470,11 +472,11 @@ export default function ChatPage() {
         )}
 
         {/* User Profile Section */}
-        <div className="p-6 border-b" style={{ borderColor: 'var(--border-color)' }}>
-          <div className="flex items-center gap-4">
+        <div className="p-4 md:p-6 border-b" style={{ borderColor: 'var(--border-color)' }}>
+          <div className="flex items-center gap-3 md:gap-4">
             {/* Avatar */}
             <div
-              className="w-14 h-14 flex items-center justify-center flex-shrink-0 cursor-pointer hover:opacity-90 transition"
+              className="w-12 h-12 md:w-14 md:h-14 flex items-center justify-center flex-shrink-0 cursor-pointer hover:opacity-90 transition"
               style={{
                 backgroundImage: user?.avatar_url ? `url(${user.avatar_url})` : undefined,
                 backgroundSize: 'cover',
@@ -654,11 +656,13 @@ export default function ChatPage() {
       </div>
 
       {/* Main Chat Area */}
-      <div className="flex-1 flex flex-col relative">
+      <div className={`flex-1 flex flex-col relative ${
+        selectedChat ? 'flex' : 'hidden md:flex'
+      }`}>
         {selectedChat ? (
           <>
             {/* Chat Header */}
-            <div className="p-4 border-b flex items-center gap-4" style={{ 
+            <div className="p-3 md:p-4 border-b flex items-center gap-2 md:gap-4" style={{ 
               backgroundColor: 'var(--bg-card)', 
               borderColor: 'var(--border-color)' 
             }}>
@@ -974,7 +978,7 @@ export default function ChatPage() {
                   animate={{ opacity: 1, scale: 1, y: 0 }}
                   exit={{ opacity: 0, scale: 0.8, y: 20 }}
                   onClick={() => scrollToBottom(true)}
-                  className="absolute bottom-24 right-8 p-3 rounded-full shadow-xl hover:scale-110 transition-transform"
+                  className="absolute bottom-20 md:bottom-24 right-4 md:right-8 p-2.5 md:p-3 rounded-full shadow-xl hover:scale-110 transition-transform"
                   style={{ 
                     backgroundColor: 'var(--accent-primary)', 
                     color: 'white',
@@ -1002,11 +1006,11 @@ export default function ChatPage() {
             </AnimatePresence>
 
             {/* Message Input */}
-            <div className="p-4 border-t" style={{ 
+            <div className="p-3 md:p-4 border-t" style={{ 
               backgroundColor: 'var(--bg-card)', 
               borderColor: 'var(--border-color)' 
             }}>
-              <div className="flex gap-3 max-w-4xl mx-auto">
+              <div className="flex gap-2 md:gap-3 max-w-4xl mx-auto">
                 <input
                   ref={messageInputRef}
                   type="text"
@@ -1015,7 +1019,7 @@ export default function ChatPage() {
                   onKeyPress={handleKeyPress}
                   placeholder="Написать сообщение..."
                   disabled={sendingMessage}
-                  className="flex-1 px-4 py-3 rounded-2xl font-inter text-sm outline-none transition"
+                  className="flex-1 px-3 md:px-4 py-2.5 md:py-3 rounded-2xl font-inter text-sm outline-none transition"
                   style={{
                     backgroundColor: 'var(--bg-input)',
                     color: 'var(--text-primary)',
@@ -1028,7 +1032,7 @@ export default function ChatPage() {
                   whileTap={{ scale: 0.95 }}
                   onClick={handleSendMessage}
                   disabled={!messageText.trim() || sendingMessage}
-                  className="px-6 py-3 rounded-2xl font-inter font-semibold flex items-center gap-2 transition hover:opacity-90 disabled:opacity-50 disabled:cursor-not-allowed"
+                  className="px-4 md:px-6 py-2.5 md:py-3 rounded-2xl font-inter font-semibold flex items-center gap-2 transition hover:opacity-90 disabled:opacity-50 disabled:cursor-not-allowed"
                   style={{ backgroundColor: 'var(--accent-primary)', color: 'white' }}
                 >
                   {sendingMessage ? (
diff --git a/frontend/src/pages/ProfilePage.tsx b/frontend/src/pages/ProfilePage.tsx
index 5a8e3c7..de79844 100644
--- a/frontend/src/pages/ProfilePage.tsx
+++ b/frontend/src/pages/ProfilePage.tsx
@@ -152,16 +152,16 @@ export default function ProfilePage() {
 
   return (
     <div className="min-h-screen" style={{ backgroundColor: 'var(--bg-primary)' }}>
-      <div className="max-w-4xl mx-auto p-6">
+      <div className="max-w-4xl mx-auto p-4 md:p-6">
         {/* Header */}
-        <div className="mb-6 flex items-center justify-between">
+        <div className="mb-4 md:mb-6 flex items-center justify-between">
           <button
             onClick={() => navigate('/chat')}
             className="flex items-center gap-2 font-inter font-medium hover:opacity-70 transition"
             style={{ color: 'var(--accent-primary)' }}
           >
             <ArrowLeft size={20} />
-            Назад к чатам
+            <span className="hidden sm:inline">Назад к чатам</span>
           </button>
           <div className="flex items-center gap-3">
             <button
@@ -192,14 +192,14 @@ export default function ProfilePage() {
         <motion.div
           initial={{ opacity: 0, y: 20 }}
           animate={{ opacity: 1, y: 0 }}
-          className="rounded-3xl shadow-soft p-8"
+          className="rounded-2xl md:rounded-3xl shadow-soft p-4 md:p-8"
           style={{ backgroundColor: 'var(--bg-card)' }}
         >
           {/* Avatar Section */}
-          <div className="flex flex-col items-center mb-8">
+          <div className="flex flex-col items-center mb-6 md:mb-8">
             <div className="relative">
               <div
-                className="w-32 h-32 flex items-center justify-center overflow-hidden"
+                className="w-24 h-24 md:w-32 md:h-32 flex items-center justify-center overflow-hidden"
                 style={{
                   backgroundImage: user.avatar_url ? `url(${user.avatar_url})` : undefined,
                   backgroundSize: 'cover',
@@ -214,10 +214,10 @@ export default function ProfilePage() {
               
               <label
                 htmlFor="avatar-upload"
-                className="absolute bottom-0 right-0 p-2 rounded-full cursor-pointer hover:opacity-80 transition"
+                className="absolute bottom-0 right-0 p-1.5 md:p-2 rounded-full cursor-pointer hover:opacity-80 transition"
                 style={{ backgroundColor: 'var(--accent-primary)' }}
               >
-                <Camera size={20} className="text-white" />
+                <Camera size={18} className="text-white md:w-5 md:h-5" />
                 <input
                   id="avatar-upload"
                   type="file"
@@ -232,16 +232,16 @@ export default function ProfilePage() {
                 <button
                   type="button"
                   onClick={handleDeleteAvatar}
-                  className="absolute bottom-0 left-0 p-2 rounded-full hover:opacity-80 transition"
+                  className="absolute bottom-0 left-0 p-1.5 md:p-2 rounded-full hover:opacity-80 transition"
                   style={{ backgroundColor: 'var(--error-color)' }}
                   disabled={isLoading}
                 >
-                  <Trash2 size={20} className="text-white" />
+                  <Trash2 size={18} className="text-white md:w-5 md:h-5" />
                 </button>
               )}
             </div>
 
-            <h1 className="mt-4 text-2xl font-lora font-semibold" style={{ color: 'var(--text-primary)' }}>
+            <h1 className="mt-4 text-xl md:text-2xl font-lora font-semibold" style={{ color: 'var(--text-primary)' }}>
               {user.username}
             </h1>
             <p className="font-inter text-sm" style={{ color: 'var(--text-secondary)' }}>
diff --git a/frontend/src/services/userService.ts b/frontend/src/services/userService.ts
index 58d70fe..875d28b 100644
--- a/frontend/src/services/userService.ts
+++ b/frontend/src/services/userService.ts
@@ -32,7 +32,11 @@ export const userService = {
   },
 
   updateProfile: async (data: UserUpdate): Promise<User> => {
-    const response = await apiClient.put('/users/me', data);
+    // Filter out empty strings to avoid validation errors
+    const filteredData = Object.fromEntries(
+      Object.entries(data).filter(([_, value]) => value !== '')
+    );
+    const response = await apiClient.put('/users/me', filteredData);
     return response.data;
   },