diff --git a/backend/app.py b/backend/app.py
index 40365ec..48af70e 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -59,9 +59,36 @@ app.register_blueprint(finance_blueprint, url_prefix='/api')
 app.register_blueprint(team_blueprint, url_prefix='/api')
 app.register_blueprint(repricer_blueprint, url_prefix='/api')
 
+# Health check endpoint - проверка состояния приложения и БД
+from flask import jsonify
+from .db import get_db_connection, release_db_connection
+
+@app.route('/api/health')
+def health_check():
+    db_status = "ok"
+    db_error = None
+    try:
+        conn = get_db_connection()
+        cur = conn.cursor()
+        cur.execute("SELECT 1")
+        release_db_connection(conn)
+    except Exception as e:
+        db_status = "error"
+        db_error = str(e)
+    
+    status = "ok" if db_status == "ok" else "degraded"
+    return jsonify({
+        "status": status,
+        "backend": "ok",
+        "database": db_status,
+        "db_error": db_error
+    }), 200 if status == "ok" else 503
+
+
 import threading
 import time
 
+
 def background_scanner():
     """Фоновая задача для имитации сканирования маркетплейсов."""
     while True:
diff --git a/frontend/index.html b/frontend/index.html
index a147902..f69685b 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -31,7 +31,7 @@
             <form id="auth-form">
                 <input type="text" id="auth-username" placeholder="Логин" required />
                 <input type="password" id="auth-password" placeholder="Пароль" required />
-                <button type="submit" class="btn-primary" style="width: 100%; margin-top: 1rem;">Войти</button>
+                <button type="submit" id="auth-submit-btn" class="btn-primary" style="width: 100%; margin-top: 1rem;">Войти</button>
             </form>
             <p style="margin-top: 1rem; text-align: center;">
                 <a href="#" id="auth-toggle">Нет аккаунта? Зарегистрироваться</a>
diff --git a/frontend/js/app.js b/frontend/js/app.js
index ab5ed8d..a885e77 100644
--- a/frontend/js/app.js
+++ b/frontend/js/app.js
@@ -87,6 +87,7 @@ function initAuth() {
     const authForm = document.getElementById('auth-form');
     const toggleBtn = document.getElementById('auth-toggle');
     const title = document.getElementById('auth-title');
+    const submitBtn = document.getElementById('auth-submit-btn');
     const logoutBtn = document.getElementById('logout-btn');
     
     toggleBtn.addEventListener('click', (e) => {
@@ -94,6 +95,7 @@ function initAuth() {
         isLoginMode = !isLoginMode;
         title.textContent = isLoginMode ? 'Вход в систему' : 'Регистрация';
         toggleBtn.textContent = isLoginMode ? 'Нет аккаунта? Зарегистрироваться' : 'Уже есть аккаунт? Войти';
+        submitBtn.textContent = isLoginMode ? 'Войти' : 'Зарегистрироваться';
     });
     
     authForm.addEventListener('submit', async (e) => {
@@ -110,6 +112,7 @@ function initAuth() {
                 isLoginMode = true;
                 title.textContent = 'Вход в систему';
                 toggleBtn.textContent = 'Нет аккаунта? Зарегистрироваться';
+                submitBtn.textContent = 'Войти';
                 return;
             }
             window.location.reload();