Upload Soola.txt

Soola.txt

@@ -0,0 +1,1193 @@
+
+from flask import Flask, render_template_string, request, redirect, url_for, jsonify, flash, send_from_directory, session
+import json
+import os
+import logging
+import threading
+import time
+from datetime import datetime
+import pytz
+from huggingface_hub import HfApi, hf_hub_download
+from huggingface_hub.utils import RepositoryNotFoundError, HfHubHTTPError
+import uuid
+from decimal import Decimal, InvalidOperation, ROUND_HALF_UP
+import functools
+
+app = Flask(__name__)
+app.secret_key = os.urandom(24)
+
+INVENTORY_FILE = 'inventory.json'
+SALES_FILE = 'sales.json'
+USERS_FILE = 'users.json'
+KASSA_FILE = 'kassa.json'
+
+HF_TOKEN_WRITE = os.getenv("HF_TOKEN_WRITE", "YOUR_WRITE_TOKEN_HERE")
+HF_TOKEN_READ = os.getenv("HF_TOKEN_READ", "YOUR_READ_TOKEN_HERE")
+REPO_ID = "Kgshop/postest"
+
+BISHKEK_TZ = pytz.timezone('Asia/Bishkek')
+
+logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
+
+data_locks = {
+    INVENTORY_FILE: threading.Lock(),
+    SALES_FILE: threading.Lock(),
+    USERS_FILE: threading.Lock(),
+    KASSA_FILE: threading.Lock()
+}
+
+def get_current_time():
+    return datetime.now(BISHKEK_TZ)
+
+def hf_download_file(filename):
+    try:
+        hf_hub_download(
+            repo_id=REPO_ID, filename=filename, repo_type="dataset", token=HF_TOKEN_READ,
+            local_dir=".", local_dir_use_symlinks=False, force_download=True,
+        )
+        logging.info(f"{filename} downloaded successfully from Hugging Face.")
+    except RepositoryNotFoundError:
+        logging.warning(f"Repository {REPO_ID} not found. Checking local {filename}.")
+    except HfHubHTTPError as e:
+        if e.response.status_code == 404:
+            logging.warning(f"File {filename} not found in repository {REPO_ID}. Will create a new one if it doesn't exist locally.")
+        else:
+            logging.error(f"HTTP error downloading {filename} from Hugging Face: {e}")
+    except Exception as e:
+        logging.error(f"Unknown error downloading {filename} from Hugging Face: {e}")
+
+def load_generic_data(filename, default_structure_factory):
+    with data_locks[filename]:
+        hf_download_file(filename)
+        try:
+            with open(filename, 'r', encoding='utf-8') as file:
+                return json.load(file)
+        except (FileNotFoundError, json.JSONDecodeError):
+            logging.warning(f"{filename} not found or corrupted. Initializing with default structure.")
+            return default_structure_factory()
+
+def save_generic_data(filename, data):
+    with data_locks[filename]:
+        try:
+            temp_file = filename + ".tmp"
+            with open(temp_file, 'w', encoding='utf-8') as file:
+                json.dump(data, file, ensure_ascii=False, indent=4, cls=DecimalEncoder)
+            os.replace(temp_file, filename)
+            logging.info(f"Data successfully saved to local file {filename}.")
+        except Exception as e:
+            logging.error(f"Critical error saving data to {filename}: {e}", exc_info=True)
+
+def load_inventory(): return load_generic_data(INVENTORY_FILE, lambda: [])
+def save_inventory(data): save_generic_data(INVENTORY_FILE, data)
+
+def load_sales(): return load_generic_data(SALES_FILE, lambda: [])
+def save_sales(data): save_generic_data(SALES_FILE, data)
+
+def load_users(): return load_generic_data(USERS_FILE, lambda: [])
+def save_users(data): save_generic_data(USERS_FILE, data)
+
+def load_kassa(): return load_generic_data(KASSA_FILE, lambda: {"kassas": [], "transactions": []})
+def save_kassa(data): save_generic_data(KASSA_FILE, data)
+
+
+@functools.lru_cache(maxsize=1)
+def get_hf_api():
+    if not HF_TOKEN_WRITE or HF_TOKEN_WRITE == "YOUR_WRITE_TOKEN_HERE":
+        logging.warning("HF_TOKEN_WRITE not set. Uploads to Hugging Face will be disabled.")
+        return None
+    try: return HfApi()
+    except Exception as e: logging.error(f"Error initializing HfApi: {e}"); return None
+
+def upload_to_hf(filepath):
+    api = get_hf_api()
+    if not api: return
+    if not os.path.exists(filepath): return
+    try:
+        filename = os.path.basename(filepath)
+        commit_time = get_current_time().strftime('%Y-%m-%d %H:%M:%S %Z%z')
+        api.upload_file(
+            path_or_fileobj=filepath, path_in_repo=filename, repo_id=REPO_ID, repo_type="dataset",
+            token=HF_TOKEN_WRITE, commit_message=f"Automated backup {filename} {commit_time}",
+            run_as_future=True
+        )
+    except Exception as e:
+        logging.error(f"Error initiating upload of {filepath} to Hugging Face: {e}")
+
+def periodic_backup():
+    while True:
+        time.sleep(1800)
+        logging.info("Starting scheduled backup...")
+        for f in [INVENTORY_FILE, SALES_FILE, USERS_FILE, KASSA_FILE]:
+            upload_to_hf(f)
+
+class DecimalEncoder(json.JSONEncoder):
+    def default(self, obj):
+        if isinstance(obj, Decimal): return str(obj)
+        return super().default(obj)
+
+def to_decimal(value, default='0.00'):
+    if value is None or value == '': return Decimal(default)
+    try: return Decimal(str(value).replace(',', '.'))
+    except InvalidOperation: return Decimal(default)
+
+def format_currency_py(value):
+    try:
+        num = to_decimal(value)
+        return f"{num:,.2f}".replace(",", " ").replace(".", ",")
+    except (InvalidOperation, TypeError, ValueError):
+        return "0,00"
+
+def find_by_id(item_id, item_list):
+    return next((item for item in item_list if isinstance(item, dict) and item.get('id') == item_id), None)
+
+@app.before_request
+def check_auth():
+    if request.endpoint and request.endpoint not in ['login', 'static']:
+        if 'user_id' not in session or 'kassa_id' not in session:
+            return redirect(url_for('login'))
+    if 'user_id' in session:
+        users = load_users()
+        user = find_by_id(session['user_id'], users)
+        if not user:
+            session.clear()
+            flash("Ваша сессия истекла. Пожалуйста, войдите снова.", "warning")
+            return redirect(url_for('login'))
+
+@app.route('/', methods=['GET', 'POST'])
+def login():
+    if request.method == 'POST':
+        user_id = request.form.get('user_id')
+        kassa_id = request.form.get('kassa_id')
+        pin = request.form.get('pin')
+        users = load_users()
+        user = find_by_id(user_id, users)
+
+        if user and user.get('pin') == pin:
+            session['user_id'] = user_id
+            session['user_name'] = user.get('name')
+            session['kassa_id'] = kassa_id
+            kassa_data = load_kassa()
+            kassa = find_by_id(kassa_id, kassa_data.get('kassas', []))
+            session['kassa_name'] = kassa.get('name') if kassa else 'Неизвестная касса'
+            flash(f"Добро пожаловать, {session['user_name']}! Вы работаете на '{session['kassa_name']}'.", "success")
+            return redirect(url_for('pos'))
+        else:
+            flash("Неверный PIN-код.", "danger")
+            return redirect(url_for('login'))
+
+    if 'user_id' in session and 'kassa_id' in session:
+        return redirect(url_for('pos'))
+
+    users = [u for u in load_users() if u.get('is_active', True)]
+    kassa_data = load_kassa()
+    kassas = kassa_data.get('kassas', [])
+    html = BASE_TEMPLATE.replace('__TITLE__', "Вход").replace('__CONTENT__', LOGIN_CONTENT).replace('__SCRIPTS__', '')
+    return render_template_string(html, users=users, kassas=kassas, no_sidebar=True)
+
+@app.route('/logout')
+def logout():
+    session.clear()
+    flash("Вы успешно вышли из системы.", "success")
+    return redirect(url_for('login'))
+
+@app.route('/pos')
+def pos():
+    html = BASE_TEMPLATE.replace('__TITLE__', "Касса").replace('__CONTENT__', POS_CONTENT).replace('__SCRIPTS__', POS_SCRIPTS)
+    return render_template_string(html)
+
+@app.route('/api/product_by_barcode/<barcode>')
+def get_product_by_barcode(barcode):
+    inventory = load_inventory()
+    product = next((p for p in inventory if p.get('barcode') == barcode), None)
+    if product:
+        if to_decimal(product.get('quantity', '0')) > 0:
+            return jsonify(product)
+        else:
+            return jsonify({'error': 'Товар закончился'}), 404
+    return jsonify({'error': 'Товар не найден'}), 404
+
+@app.route('/api/process_sale', methods=['POST'])
+def process_sale():
+    data = request.json
+    cart = data.get('cart', [])
+    payment_method = data.get('payment_method')
+    user_id = session.get('user_id')
+    kassa_id = session.get('kassa_id')
+
+    if not all([cart, payment_method, user_id, kassa_id]):
+        return jsonify({'error': 'Неполные данные для продажи.'}), 400
+
+    inventory = load_inventory()
+    sales = load_sales()
+    kassa_data = load_kassa()
+    users = load_users()
+    
+    user = find_by_id(user_id, users)
+    kassa = find_by_id(kassa_id, kassa_data.get('kassas', []))
+
+    if not user or not kassa:
+        return jsonify({'error': 'Пользователь или касса не найдены.'}), 400
+
+    sale_id = uuid.uuid4().hex
+    total_amount = Decimal('0.00')
+    sale_items = []
+    inventory_updates = {}
+
+    for item in cart:
+        product_id = item.get('id')
+        quantity_sold = to_decimal(item.get('quantity', '0'))
+        
+        prod_in_inv = find_by_id(product_id, inventory)
+        if not prod_in_inv:
+            return jsonify({'error': f"Товар '{item.get('name')}' не найден в инвентаре."}), 400
+        
+        current_stock = to_decimal(prod_in_inv.get('quantity', '0'))
+        if quantity_sold > current_stock:
+            return jsonify({'error': f"Недостаточно товара '{item.get('name')}'. В наличии: {current_stock}"}), 400
+        
+        sale_price = to_decimal(prod_in_inv.get('sale_price', '0'))
+        item_total = sale_price * quantity_sold
+        total_amount += item_total
+        
+        sale_items.append({
+            'product_id': product_id,
+            'name': prod_in_inv.get('name'),
+            'quantity': str(quantity_sold),
+            'sale_price': str(sale_price),
+            'total': str(item_total)
+        })
+        inventory_updates[product_id] = current_stock - quantity_sold
+
+    timestamp = get_current_time().isoformat()
+    
+    new_sale = {
+        'id': sale_id,
+        'user_id': user_id,
+        'user_name': user.get('name'),
+        'kassa_id': kassa_id,
+        'kassa_name': kassa.get('name'),
+        'items': sale_items,
+        'total_amount': str(total_amount),
+        'payment_method': payment_method,
+        'timestamp': timestamp
+    }
+    sales.append(new_sale)
+
+    for prod_id, new_quantity in inventory_updates.items():
+        for i, prod in enumerate(inventory):
+            if prod.get('id') == prod_id:
+                inventory[i]['quantity'] = str(new_quantity)
+                inventory[i]['timestamp_updated'] = timestamp
+                break
+    
+    if payment_method == 'cash':
+        for i, k in enumerate(kassa_data['kassas']):
+            if k.get('id') == kassa_id:
+                kassa_data['kassas'][i]['balance'] = str(to_decimal(k.get('balance', '0')) + total_amount)
+                break
+        
+        kassa_data['transactions'].append({
+            'id': uuid.uuid4().hex,
+            'kassa_id': kassa_id,
+            'type': 'sale',
+            'amount': str(total_amount),
+            'description': f"Продажа #{sale_id[:8]}",
+            'user_id': user_id,
+            'timestamp': timestamp
+        })
+
+    save_inventory(inventory)
+    save_sales(sales)
+    save_kassa(kassa_data)
+
+    upload_to_hf(INVENTORY_FILE)
+    upload_to_hf(SALES_FILE)
+    upload_to_hf(KASSA_FILE)
+
+    return jsonify({'success': True, 'sale_id': sale_id, 'message': 'Продажа успешно завершена!'})
+
+
+@app.route('/inventory', methods=['GET', 'POST'])
+def inventory_page():
+    inventory = load_inventory()
+    if request.method == 'POST':
+        action = request.form.get('action', 'add')
+        product_id = request.form.get('product_id')
+
+        name = request.form.get('name', '').strip()
+        barcode = request.form.get('barcode', '').strip()
+        quantity = to_decimal(request.form.get('quantity', '0'))
+        purchase_price = to_decimal(request.form.get('purchase_price', '0'))
+        sale_price = to_decimal(request.form.get('sale_price', '0'))
+        category = request.form.get('category', 'Без категории').strip()
+
+        if not name or not barcode or not sale_price > 0:
+            flash("Название, штрих-код и цена продажи обязательны.", "danger")
+            return redirect(url_for('inventory_page'))
+
+        timestamp = get_current_time().isoformat()
+        
+        if action == 'edit' and product_id:
+            product = find_by_id(product_id, inventory)
+            if product:
+                product.update({
+                    'name': name, 'barcode': barcode, 'quantity': str(quantity),
+                    'purchase_price': str(purchase_price), 'sale_price': str(sale_price),
+                    'category': category, 'timestamp_updated': timestamp
+                })
+                flash(f"Товар '{name}' обновлен.", "success")
+        else:
+            if any(p.get('barcode') == barcode for p in inventory):
+                flash(f"Товар со штрих-кодом {barcode} уже существует.", "warning")
+                return redirect(url_for('inventory_page'))
+            
+            new_product = {
+                'id': uuid.uuid4().hex, 'name': name, 'barcode': barcode, 'quantity': str(quantity),
+                'purchase_price': str(purchase_price), 'sale_price': str(sale_price),
+                'category': category, 'timestamp_added': timestamp, 'timestamp_updated': timestamp
+            }
+            inventory.append(new_product)
+            flash(f"Товар '{name}' добавлен.", "success")
+        
+        save_inventory(inventory)
+        upload_to_hf(INVENTORY_FILE)
+        return redirect(url_for('inventory_page'))
+
+    inventory.sort(key=lambda x: x.get('name', '').lower())
+    categories = sorted(list(set(p.get('category', 'Без категории') for p in inventory)))
+    html = BASE_TEMPLATE.replace('__TITLE__', "Инвентарь").replace('__CONTENT__', INVENTORY_CONTENT).replace('__SCRIPTS__', INVENTORY_SCRIPTS)
+    return render_template_string(html, inventory=inventory, categories=categories)
+
+
+@app.route('/inventory/delete/<product_id>', methods=['POST'])
+def delete_product(product_id):
+    inventory = load_inventory()
+    initial_len = len(inventory)
+    inventory = [p for p in inventory if p.get('id') != product_id]
+    if len(inventory) < initial_len:
+        save_inventory(inventory)
+        upload_to_hf(INVENTORY_FILE)
+        flash("Товар удален.", "success")
+    else:
+        flash("Товар не найден.", "warning")
+    return redirect(url_for('inventory_page'))
+
+
+@app.route('/kassa', methods=['GET', 'POST'])
+def kassa_page():
+    kassa_data = load_kassa()
+    if request.method == 'POST':
+        action = request.form.get('action')
+        timestamp = get_current_time().isoformat()
+        
+        if action == 'add_kassa':
+            name = request.form.get('name', '').strip()
+            balance = to_decimal(request.form.get('balance', '0'))
+            if name:
+                new_kassa = {'id': uuid.uuid4().hex, 'name': name, 'balance': str(balance)}
+                kassa_data['kassas'].append(new_kassa)
+                flash(f"Касса '{name}' добавлена.", "success")
+            else:
+                flash("Название кассы обязательно.", "danger")
+
+        elif action in ['income', 'expense']:
+            kassa_id = request.form.get('kassa_id')
+            amount = to_decimal(request.form.get('amount', '0'))
+            description = request.form.get('description', '').strip()
+            
+            if kassa_id and amount > 0 and description:
+                kassa = find_by_id(kassa_id, kassa_data['kassas'])
+                if kassa:
+                    current_balance = to_decimal(kassa.get('balance', '0'))
+                    new_balance = current_balance + amount if action == 'income' else current_balance - amount
+                    kassa['balance'] = str(new_balance)
+                    
+                    kassa_data['transactions'].append({
+                        'id': uuid.uuid4().hex, 'kassa_id': kassa_id, 'type': action,
+                        'amount': str(amount), 'description': description,
+                        'user_id': session.get('user_id'), 'timestamp': timestamp
+                    })
+                    flash(f"Операция '{description}' на сумму {format_currency_py(amount)} проведена.", "success")
+                else:
+                    flash("Касса не найдена.", "danger")
+            else:
+                flash("Заполните все поля для транзакции.", "danger")
+
+        save_kassa(kassa_data)
+        upload_to_hf(KASSA_FILE)
+        return redirect(url_for('kassa_page'))
+
+    users = load_users()
+    for t in kassa_data['transactions']:
+        kassa = find_by_id(t.get('kassa_id'), kassa_data['kassas'])
+        t['kassa_name'] = kassa.get('name') if kassa else 'N/A'
+        user = find_by_id(t.get('user_id'), users)
+        t['user_name'] = user.get('name') if user else 'Система'
+
+    kassa_data['transactions'].sort(key=lambda x: x.get('timestamp', ''), reverse=True)
+    html = BASE_TEMPLATE.replace('__TITLE__', "Кассы").replace('__CONTENT__', KASSA_CONTENT).replace('__SCRIPTS__', '')
+    return render_template_string(html, kassa_data=kassa_data)
+
+
+@app.route('/users', methods=['GET', 'POST'])
+def users_page():
+    users = load_users()
+    if request.method == 'POST':
+        action = request.form.get('action', 'add')
+        user_id = request.form.get('user_id')
+        name = request.form.get('name', '').strip()
+        pin = request.form.get('pin', '').strip()
+
+        if not name or not pin or not pin.isdigit() or len(pin) != 4:
+            flash("Имя и 4-значный PIN-код обязательны.", "danger")
+            return redirect(url_for('users_page'))
+
+        if action == 'edit' and user_id:
+            user = find_by_id(user_id, users)
+            if user:
+                user.update({'name': name, 'pin': pin})
+                flash(f"Данные пользователя '{name}' обновлены.", "success")
+        else:
+            new_user = {
+                'id': uuid.uuid4().hex, 'name': name, 'pin': pin,
+                'role': 'cashier', 'is_active': True
+            }
+            users.append(new_user)
+            flash(f"Пользователь '{name}' добавлен.", "success")
+        
+        save_users(users)
+        upload_to_hf(USERS_FILE)
+        return redirect(url_for('users_page'))
+
+    html = BASE_TEMPLATE.replace('__TITLE__', "Пользователи").replace('__CONTENT__', USERS_CONTENT).replace('__SCRIPTS__', USERS_SCRIPTS)
+    return render_template_string(html, users=users)
+
+@app.route('/users/toggle_active/<user_id>', methods=['POST'])
+def toggle_user_active(user_id):
+    users = load_users()
+    user = find_by_id(user_id, users)
+    if user:
+        user['is_active'] = not user.get('is_active', True)
+        status = "активирован" if user['is_active'] else "деактивирован"
+        save_users(users)
+        upload_to_hf(USERS_FILE)
+        flash(f"Пользователь '{user.get('name')}' {status}.", "success")
+    else:
+        flash("Пользователь не найден.", "warning")
+    return redirect(url_for('users_page'))
+
+@app.route('/admin')
+def admin_panel():
+    inventory = load_inventory()
+    sales = load_sales()
+    kassa_data = load_kassa()
+    
+    total_products = len(inventory)
+    total_stock_value_purchase = sum(to_decimal(p.get('quantity', 0)) * to_decimal(p.get('purchase_price', 0)) for p in inventory)
+    total_stock_value_sale = sum(to_decimal(p.get('quantity', 0)) * to_decimal(p.get('sale_price', 0)) for p in inventory)
+    total_cash_in_kassas = sum(to_decimal(k.get('balance', 0)) for k in kassa_data.get('kassas', []))
+    
+    today_start = get_current_time().replace(hour=0, minute=0, second=0, microsecond=0)
+    sales_today = [s for s in sales if datetime.fromisoformat(s['timestamp']) >= today_start]
+    sales_today_count = len(sales_today)
+    sales_today_revenue = sum(to_decimal(s.get('total_amount', 0)) for s in sales_today)
+
+    stats = {
+        'total_products': total_products,
+        'total_stock_value_purchase': total_stock_value_purchase,
+        'total_stock_value_sale': total_stock_value_sale,
+        'total_cash_in_kassas': total_cash_in_kassas,
+        'sales_today_count': sales_today_count,
+        'sales_today_revenue': sales_today_revenue,
+    }
+
+    html = BASE_TEMPLATE.replace('__TITLE__', "Админ-панель").replace('__CONTENT__', ADMIN_CONTENT).replace('__SCRIPTS__', '')
+    return render_template_string(html, stats=stats)
+
+
+@app.route('/backup', methods=['POST'])
+def backup_hf():
+    for f in [INVENTORY_FILE, SALES_FILE, USERS_FILE, KASSA_FILE]:
+        upload_to_hf(f)
+    flash("Запущена загрузка резервных копий в облако.", "success")
+    return redirect(url_for('admin_panel'))
+
+@app.route('/download', methods=['GET'])
+def download_hf():
+    for f in [INVENTORY_FILE, SALES_FILE, USERS_FILE, KASSA_FILE]:
+        hf_download_file(f)
+    flash("Данные загружены из облака. Локальные файлы перезаписаны.", "success")
+    return redirect(url_for('admin_panel'))
+
+
+LOGIN_CONTENT = """
+<div class="container">
+    <div class="row justify-content-center align-items-center" style="min-height: 100vh;">
+        <div class="col-md-6 col-lg-4">
+            <div class="card shadow-sm">
+                <div class="card-body p-4 p-md-5">
+                    <div class="text-center mb-4">
+                        <i class="fas fa-cash-register fa-3x text-primary"></i>
+                        <h3 class="mt-3">Вход в систему</h3>
+                    </div>
+                    {% with messages = get_flashed_messages(with_categories=true) %}
+                      {% if messages %}
+                        {% for category, message in messages %}
+                          <div class="alert alert-{{ category }}">{{ message }}</div>
+                        {% endfor %}
+                      {% endif %}
+                    {% endwith %}
+                    <form method="POST" action="{{ url_for('login') }}">
+                        <div class="mb-3">
+                            <label for="user_id" class="form-label">Кассир</label>
+                            <select id="user_id" name="user_id" class="form-select form-select-lg" required>
+                                <option value="" disabled selected>-- Выберите себя --</option>
+                                {% for user in users %}
+                                <option value="{{ user.id }}">{{ user.name }}</option>
+                                {% endfor %}
+                            </select>
+                        </div>
+                        <div class="mb-3">
+                            <label for="kassa_id" class="form-label">Касса</label>
+                            <select id="kassa_id" name="kassa_id" class="form-select form-select-lg" required>
+                                <option value="" disabled selected>-- Выберите кассу --</option>
+                                {% for kassa in kassas %}
+                                <option value="{{ kassa.id }}">{{ kassa.name }}</option>
+                                {% endfor %}
+                            </select>
+                        </div>
+                        <div class="mb-4">
+                            <label for="pin" class="form-label">PIN-код</label>
+                            <input type="password" id="pin" name="pin" class="form-control form-control-lg" required inputmode="numeric" pattern="[0-9]{4}" maxlength="4" autocomplete="off">
+                        </div>
+                        <div class="d-grid">
+                            <button type="submit" class="btn btn-primary btn-lg">Войти</button>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+"""
+
+POS_CONTENT = """
+<div class="row" style="height: calc(100vh - var(--topbar-height) - 3rem);">
+    <div class="col-md-7 h-100 d-flex flex-column">
+        <div class="card flex-grow-1">
+            <div class="card-header d-flex justify-content-between align-items-center">
+                <h5 class="mb-0">Чек</h5>
+                <button id="clear-cart-btn" class="btn btn-sm btn-outline-danger"><i class="fas fa-times me-1"></i>Очистить</button>
+            </div>
+            <div class="card-body p-0" style="overflow-y: auto;">
+                <table class="table table-hover table-striped mb-0" id="cart-table">
+                    <thead class="table-light sticky-top">
+                        <tr><th>Название</th><th style="width: 120px;">Кол-во</th><th class="text-end">Цена</th><th class="text-end">Сумма</th><th class="text-center" style="width: 50px;"></th></tr>
+                    </thead>
+                    <tbody></tbody>
+                </table>
+            </div>
+            <div class="card-footer fs-4 fw-bold d-flex justify-content-between">
+                <span>Итого:</span>
+                <span id="cart-total">0,00 сом</span>
+            </div>
+        </div>
+    </div>
+    <div class="col-md-5 h-100 d-flex flex-column">
+        <div class="card mb-3">
+            <div class="card-body">
+                <div id="scanner-container" style="width: 100%;"></div>
+                <div class="text-center mt-2">
+                    <button id="start-scan-btn" class="btn btn-info"><i class="fas fa-barcode me-2"></i>Сканировать</button>
+                    <button id="stop-scan-btn" class="btn btn-secondary" style="display:none;"><i class="fas fa-stop me-2"></i>Стоп</button>
+                </div>
+                <div id="scan-result" class="mt-2 text-center"></div>
+            </div>
+        </div>
+        <div class="card flex-grow-1">
+            <div class="card-body d-flex flex-column justify-content-end">
+                <div class="d-grid gap-3">
+                    <button class="btn btn-success btn-lg" data-payment="cash">Наличные</button>
+                    <button class="btn btn-primary btn-lg" data-payment="card">Карта</button>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+"""
+
+POS_SCRIPTS = """
+<script src="https://unpkg.com/html5-qrcode" type="text/javascript"></script>
+<script>
+document.addEventListener('DOMContentLoaded', function () {
+    const cart = [];
+    const cartTableBody = document.querySelector('#cart-table tbody');
+    const cartTotalEl = document.getElementById('cart-total');
+    let html5QrCode;
+
+    function renderCart() {
+        cartTableBody.innerHTML = '';
+        let total = 0;
+        cart.forEach((item, index) => {
+            const itemTotal = parseFloat(item.sale_price) * item.quantity;
+            total += itemTotal;
+            const row = `
+                <tr>
+                    <td>${item.name}</td>
+                    <td>
+                        <div class="input-group input-group-sm">
+                            <button class="btn btn-outline-secondary btn-minus" data-index="${index}" type="button">-</button>
+                            <input type="number" class="form-control text-center quantity-input" value="${item.quantity}" data-index="${index}" min="1" step="1">
+                            <button class="btn btn-outline-secondary btn-plus" data-index="${index}" type="button">+</button>
+                        </div>
+                    </td>
+                    <td class="text-end">${formatCurrencyJS(item.sale_price)}</td>
+                    <td class="text-end">${formatCurrencyJS(itemTotal)}</td>
+                    <td class="text-center"><button class="btn btn-sm btn-outline-danger btn-remove" data-index="${index}">&times;</button></td>
+                </tr>
+            `;
+            cartTableBody.insertAdjacentHTML('beforeend', row);
+        });
+        cartTotalEl.textContent = formatCurrencyJS(total) + ' сом';
+    }
+
+    function addToCart(product) {
+        const existingItem = cart.find(item => item.id === product.id);
+        if (existingItem) {
+            existingItem.quantity++;
+        } else {
+            cart.push({ ...product, quantity: 1 });
+        }
+        renderCart();
+    }
+    
+    function updateQuantity(index, newQuantity) {
+        if (newQuantity > 0) {
+            cart[index].quantity = newQuantity;
+        } else {
+            cart.splice(index, 1);
+        }
+        renderCart();
+    }
+    
+    cartTableBody.addEventListener('click', e => {
+        const index = e.target.dataset.index;
+        if (e.target.classList.contains('btn-plus')) {
+            cart[index].quantity++;
+            renderCart();
+        } else if (e.target.classList.contains('btn-minus')) {
+            if (cart[index].quantity > 1) {
+                cart[index].quantity--;
+            } else {
+                cart.splice(index, 1);
+            }
+            renderCart();
+        } else if (e.target.classList.contains('btn-remove')) {
+            cart.splice(index, 1);
+            renderCart();
+        }
+    });
+
+    cartTableBody.addEventListener('change', e => {
+        if (e.target.classList.contains('quantity-input')) {
+            const index = e.target.dataset.index;
+            const newQuantity = parseInt(e.target.value, 10);
+            if (!isNaN(newQuantity)) {
+                updateQuantity(index, newQuantity);
+            }
+        }
+    });
+    
+    document.getElementById('clear-cart-btn').addEventListener('click', () => {
+        cart.length = 0;
+        renderCart();
+    });
+
+    const onScanSuccess = (decodedText, decodedResult) => {
+        const scanResultEl = document.getElementById('scan-result');
+        scanResultEl.innerHTML = `<span class="text-success">Скан: ${decodedText}</span>`;
+        fetch(`/api/product_by_barcode/${decodedText}`)
+            .then(response => {
+                if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+                return response.json();
+            })
+            .then(product => {
+                if (product.error) {
+                    scanResultEl.innerHTML = `<span class="text-danger">${product.error}</span>`;
+                } else {
+                    addToCart(product);
+                }
+            })
+            .catch(e => {
+                scanResultEl.innerHTML = `<span class="text-danger">Товар не найден или ошибка сети</span>`;
+                console.error(e);
+            });
+    };
+    
+    const onScanFailure = (error) => { /* console.warn(`Code scan error = ${error}`); */ };
+    
+    const startScanBtn = document.getElementById('start-scan-btn');
+    const stopScanBtn = document.getElementById('stop-scan-btn');
+
+    startScanBtn.addEventListener('click', () => {
+        html5QrCode = new Html5Qrcode("scanner-container");
+        const config = { fps: 10, qrbox: { width: 250, height: 250 } };
+        html5QrCode.start({ facingMode: "environment" }, config, onScanSuccess, onScanFailure);
+        startScanBtn.style.display = 'none';
+        stopScanBtn.style.display = 'inline-block';
+    });
+    
+    stopScanBtn.addEventListener('click', () => {
+        html5QrCode.stop().then(() => {
+            startScanBtn.style.display = 'inline-block';
+            stopScanBtn.style.display = 'none';
+            document.getElementById('scanner-container').innerHTML = '';
+        }).catch(err => console.error("Failed to stop scanner", err));
+    });
+
+    document.querySelectorAll('[data-payment]').forEach(button => {
+        button.addEventListener('click', function() {
+            if (cart.length === 0) {
+                alert('Чек пуст.');
+                return;
+            }
+            const paymentMethod = this.dataset.payment;
+            
+            fetch('/api/process_sale', {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify({ cart: cart, payment_method: paymentMethod })
+            })
+            .then(response => response.json())
+            .then(data => {
+                if (data.success) {
+                    alert(data.message);
+                    cart.length = 0;
+                    renderCart();
+                } else {
+                    alert('Ошибка: ' + data.error);
+                }
+            })
+            .catch(error => alert('Сетевая ошибка при завершении продажи.'));
+        });
+    });
+});
+</script>
+"""
+
+INVENTORY_CONTENT = """
+<div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
+    <h1 class="h2">Инвентарь</h1>
+    <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#productModal" onclick="prepareAddModal()"><i class="fas fa-plus me-2"></i>Добавить товар</button>
+</div>
+<div class="card">
+    <div class="card-body">
+        <div class="mb-3"><input type="text" id="inventory-search" class="form-control" placeholder="Поиск по названию, штрих-коду, категории..."></div>
+        <div class="table-responsive">
+            <table class="table table-hover table-bordered" id="inventory-table">
+                <thead class="table-light">
+                    <tr><th>Название</th><th>Штрих-код</th><th>Категория</th><th class="text-end">Кол-во</th><th class="text-end">Цена закупки</th><th class="text-end">Цена продажи</th><th>Действия</th></tr>
+                </thead>
+                <tbody>
+                    {% for p in inventory %}
+                    <tr class="product-row" data-search="{{ p.name|lower }} {{ p.barcode }} {{ p.category|lower }}">
+                        <td>{{ p.name }}</td><td>{{ p.barcode }}</td><td>{{ p.category }}</td>
+                        <td class="text-end">{{ p.quantity }}</td><td class="text-end">{{ format_currency_py(p.purchase_price) }}</td><td class="text-end">{{ format_currency_py(p.sale_price) }}</td>
+                        <td>
+                            <button class="btn btn-sm btn-outline-primary" onclick="prepareEditModal('{{ p|tojson|safe }}')"><i class="fas fa-edit"></i></button>
+                            <form method="POST" action="{{ url_for('delete_product', product_id=p.id) }}" class="d-inline" onsubmit="return confirm('Удалить товар?');">
+                                <button type="submit" class="btn btn-sm btn-outline-danger"><i class="fas fa-trash"></i></button>
+                            </form>
+                        </td>
+                    </tr>
+                    {% endfor %}
+                </tbody>
+            </table>
+        </div>
+    </div>
+</div>
+<div class="modal fade" id="productModal" tabindex="-1">
+  <div class="modal-dialog modal-lg">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h5 class="modal-title" id="productModalLabel">Добавить товар</h5>
+        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+      </div>
+      <form method="POST">
+        <input type="hidden" name="action" id="form_action" value="add">
+        <input type="hidden" name="product_id" id="form_product_id">
+        <div class="modal-body">
+            <div class="row">
+                <div class="col-md-6 mb-3"><label class="form-label">Название</label><input type="text" name="name" id="form_name" class="form-control" required></div>
+                <div class="col-md-6 mb-3"><label class="form-label">Штрих-код</label>
+                    <div class="input-group">
+                        <input type="text" name="barcode" id="form_barcode" class="form-control" required>
+                        <button class="btn btn-outline-secondary" type="button" data-bs-toggle="modal" data-bs-target="#scannerModal"><i class="fas fa-barcode"></i></button>
+                    </div>
+                </div>
+            </div>
+            <div class="row">
+                <div class="col-md-4 mb-3"><label class="form-label">Количество</label><input type="number" name="quantity" id="form_quantity" class="form-control" value="0" step="1"></div>
+                <div class="col-md-4 mb-3"><label class="form-label">Цена закупки</label><input type="text" name="purchase_price" id="form_purchase_price" class="form-control" inputmode="decimal"></div>
+                <div class="col-md-4 mb-3"><label class="form-label">Цена продажи</label><input type="text" name="sale_price" id="form_sale_price" class="form-control" inputmode="decimal" required></div>
+            </div>
+            <div class="mb-3"><label class="form-label">Категория</label><input type="text" name="category" id="form_category" class="form-control" list="category-list"><datalist id="category-list">{% for c in categories %}<option value="{{ c }}">{% endfor %}</datalist></div>
+        </div>
+        <div class="modal-footer">
+          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Отмена</button>
+          <button type="submit" class="btn btn-primary">Сохранить</button>
+        </div>
+      </form>
+    </div>
+  </div>
+</div>
+<div class="modal fade" id="scannerModal" tabindex="-1"><div class="modal-dialog"><div class="modal-content">
+    <div class="modal-header"><h5 class="modal-title">Сканировать штрих-код</h5><button type="button" class="btn-close" data-bs-dismiss="modal"></button></div>
+    <div class="modal-body"><div id="modal-scanner-container" style="width: 100%;"></div></div>
+</div></div></div>
+"""
+
+INVENTORY_SCRIPTS = """
+<script src="https://unpkg.com/html5-qrcode" type="text/javascript"></script>
+<script>
+let modalScanner;
+const productModal = new bootstrap.Modal(document.getElementById('productModal'));
+const scannerModal = new bootstrap.Modal(document.getElementById('scannerModal'));
+
+function prepareAddModal() {
+    document.getElementById('productModalLabel').textContent = 'Добавить товар';
+    document.getElementById('form_action').value = 'add';
+    const form = document.querySelector('#productModal form');
+    form.reset();
+    document.getElementById('form_product_id').value = '';
+}
+
+function prepareEditModal(productJson) {
+    const product = JSON.parse(productJson);
+    document.getElementById('productModalLabel').textContent = 'Редактировать товар';
+    document.getElementById('form_action').value = 'edit';
+    document.getElementById('form_product_id').value = product.id;
+    document.getElementById('form_name').value = product.name;
+    document.getElementById('form_barcode').value = product.barcode;
+    document.getElementById('form_quantity').value = product.quantity;
+    document.getElementById('form_purchase_price').value = (product.purchase_price || '').replace('.', ',');
+    document.getElementById('form_sale_price').value = (product.sale_price || '').replace('.', ',');
+    document.getElementById('form_category').value = product.category;
+    productModal.show();
+}
+
+document.getElementById('scannerModal').addEventListener('shown.bs.modal', () => {
+    modalScanner = new Html5Qrcode("modal-scanner-container");
+    const config = { fps: 10, qrbox: { width: 250, height: 150 } };
+    modalScanner.start({ facingMode: "environment" }, config, 
+        (decodedText) => {
+            document.getElementById('form_barcode').value = decodedText;
+            modalScanner.stop();
+            scannerModal.hide();
+        }, 
+        (error) => {}
+    );
+});
+
+document.getElementById('scannerModal').addEventListener('hidden.bs.modal', () => {
+    if (modalScanner && modalScanner.isScanning) {
+        modalScanner.stop();
+    }
+});
+
+document.addEventListener('DOMContentLoaded', () => {
+    const searchInput = document.getElementById('inventory-search');
+    const tableBody = document.getElementById('inventory-table')?.querySelector('tbody');
+    if (searchInput && tableBody) {
+        searchInput.addEventListener('input', function() {
+            const searchTerm = this.value.toLowerCase().trim();
+            tableBody.querySelectorAll('tr.product-row').forEach(row => {
+                row.style.display = (row.dataset.search || '').includes(searchTerm) ? '' : 'none';
+            });
+        });
+    }
+});
+</script>
+"""
+
+KASSA_CONTENT = """
+<div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
+    <h1 class="h2">Кассы</h1>
+</div>
+<div class="row">
+    <div class="col-lg-4 mb-4">
+        <div class="card">
+            <div class="card-header"><h5 class="mb-0">Операции</h5></div>
+            <div class="card-body">
+                <form method="POST">
+                    <input type="hidden" name="action" id="transaction_action" value="income">
+                    <div class="mb-3">
+                        <label class="form-label">Касса</label>
+                        <select name="kassa_id" class="form-select" required>{% for k in kassa_data.kassas %}<option value="{{ k.id }}">{{ k.name }}</option>{% endfor %}</select>
+                    </div>
+                    <div class="mb-3">
+                        <label class="form-label">Сумма</label>
+                        <input type="text" name="amount" class="form-control" inputmode="decimal" required>
+                    </div>
+                    <div class="mb-3">
+                        <label class="form-label">Описание</label>
+                        <input type="text" name="description" class="form-control" required>
+                    </div>
+                    <div class="d-grid gap-2">
+                        <button type="submit" class="btn btn-success" onclick="document.getElementById('transaction_action').value='income'">Внесение</button>
+                        <button type="submit" class="btn btn-danger" onclick="document.getElementById('transaction_action').value='expense'">Изъятие</button>
+                    </div>
+                </form>
+            </div>
+        </div>
+        <div class="card mt-4">
+            <div class="card-header"><h5 class="mb-0">Добавить кассу</h5></div>
+            <div class="card-body">
+                <form method="POST">
+                    <input type="hidden" name="action" value="add_kassa">
+                    <div class="mb-2"><label class="form-label">Название</label><input type="text" name="name" class="form-control" required></div>
+                    <div class="mb-3"><label class="form-label">Начальный баланс</label><input type="text" name="balance" class="form-control" value="0" inputmode="decimal"></div>
+                    <button type="submit" class="btn btn-primary">Добавить</button>
+                </form>
+            </div>
+        </div>
+    </div>
+    <div class="col-lg-8">
+        <div class="card mb-4">
+            <div class="card-header"><h5 class="mb-0">Текущие балансы</h5></div>
+            <ul class="list-group list-group-flush">
+            {% for k in kassa_data.kassas %}
+                <li class="list-group-item d-flex justify-content-between align-items-center">
+                    {{ k.name }} <span class="badge bg-primary rounded-pill fs-6">{{ format_currency_py(k.balance) }} сом</span>
+                </li>
+            {% else %}
+                <li class="list-group-item">Кассы не добавлены.</li>
+            {% endfor %}
+            </ul>
+        </div>
+        <div class="card">
+            <div class="card-header"><h5 class="mb-0">История транзакций</h5></div>
+            <div class="card-body">
+                <div class="table-responsive" style="max-height: 400px;">
+                    <table class="table table-sm table-hover">
+                        <thead><tr><th>Дата</th><th>Касса</th><th>Тип</th><th>Сумма</th><th>Описание</th><th>Кассир</th></tr></thead>
+                        <tbody>
+                        {% for t in kassa_data.transactions %}
+                            <tr>
+                                <td>{{ t.timestamp[:16]|replace('T', ' ') }}</td><td>{{ t.kassa_name }}</td>
+                                <td><span class="badge text-bg-{{ 'success' if t.type in ['income', 'sale'] else 'danger' }}">{{ t.type }}</span></td>
+                                <td>{{ format_currency_py(t.amount) }}</td><td>{{ t.description }}</td><td>{{ t.user_name }}</td>
+                            </tr>
+                        {% endfor %}
+                        </tbody>
+                    </table>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+"""
+
+USERS_CONTENT = """
+<div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
+    <h1 class="h2">Пользователи</h1>
+    <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#userModal" onclick="prepareAddUserModal()"><i class="fas fa-user-plus me-2"></i>Добавить</button>
+</div>
+<div class="card">
+    <div class="card-body">
+        <div class="table-responsive">
+            <table class="table table-hover">
+                <thead><tr><th>Имя</th><th>PIN</th><th>Статус</th><th>Действия</th></tr></thead>
+                <tbody>
+                {% for u in users %}
+                    <tr>
+                        <td>{{ u.name }}</td><td>{{ u.pin }}</td>
+                        <td><span class="badge text-bg-{{ 'success' if u.is_active else 'secondary' }}">{{ 'Активен' if u.is_active else 'Неактивен' }}</span></td>
+                        <td>
+                            <button class="btn btn-sm btn-outline-primary" onclick="prepareEditUserModal('{{ u|tojson|safe }}')"><i class="fas fa-edit"></i></button>
+                            <form method="POST" action="{{ url_for('toggle_user_active', user_id=u.id) }}" class="d-inline">
+                                <button type="submit" class="btn btn-sm btn-outline-{{ 'warning' if u.is_active else 'success' }}">{{ 'Деактивировать' if u.is_active else 'Активировать' }}</button>
+                            </form>
+                        </td>
+                    </tr>
+                {% endfor %}
+                </tbody>
+            </table>
+        </div>
+    </div>
+</div>
+<div class="modal fade" id="userModal" tabindex="-1">
+  <div class="modal-dialog">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h5 class="modal-title" id="userModalLabel">Добавить пользователя</h5>
+        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+      </div>
+      <form method="POST">
+        <input type="hidden" name="action" id="user_form_action" value="add">
+        <input type="hidden" name="user_id" id="user_form_id">
+        <div class="modal-body">
+            <div class="mb-3"><label class="form-label">Имя</label><input type="text" name="name" id="user_form_name" class="form-control" required></div>
+            <div class="mb-3"><label class="form-label">PIN (4 цифры)</label><input type="text" name="pin" id="user_form_pin" class="form-control" required pattern="[0-9]{4}" maxlength="4"></div>
+        </div>
+        <div class="modal-footer">
+          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Отмена</button>
+          <button type="submit" class="btn btn-primary">Сохранить</button>
+        </div>
+      </form>
+    </div>
+  </div>
+</div>
+"""
+
+USERS_SCRIPTS = """
+<script>
+const userModal = new bootstrap.Modal(document.getElementById('userModal'));
+
+function prepareAddUserModal() {
+    document.getElementById('userModalLabel').textContent = 'Добавить пользователя';
+    document.getElementById('user_form_action').value = 'add';
+    document.querySelector('#userModal form').reset();
+    document.getElementById('user_form_id').value = '';
+}
+
+function prepareEditUserModal(userJson) {
+    const user = JSON.parse(userJson);
+    document.getElementById('userModalLabel').textContent = 'Редактировать пользователя';
+    document.getElementById('user_form_action').value = 'edit';
+    document.getElementById('user_form_id').value = user.id;
+    document.getElementById('user_form_name').value = user.name;
+    document.getElementById('user_form_pin').value = user.pin;
+    userModal.show();
+}
+</script>
+"""
+
+ADMIN_CONTENT = """
+<div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
+    <h1 class="h2">Админ-панель</h1>
+</div>
+<div class="row">
+    <div class="col-md-4 mb-3"><div class="card"><div class="card-body"><h6 class="card-subtitle text-muted">Продаж сегодня</h6><p class="card-text fs-2 fw-bold">{{ stats.sales_today_count }}</p></div></div></div>
+    <div class="col-md-4 mb-3"><div class="card"><div class="card-body"><h6 class="card-subtitle text-muted">Выручка сегодня</h6><p class="card-text fs-2 fw-bold">{{ format_currency_py(stats.sales_today_revenue) }}</p></div></div></div>
+    <div class="col-md-4 mb-3"><div class="card"><div class="card-body"><h6 class="card-subtitle text-muted">Наличные в кассах</h6><p class="card-text fs-2 fw-bold">{{ format_currency_py(stats.total_cash_in_kassas) }}</p></div></div></div>
+    <div class="col-md-4 mb-3"><div class="card"><div class="card-body"><h6 class="card-subtitle text-muted">Позиций в инвентаре</h6><p class="card-text fs-2 fw-bold">{{ stats.total_products }}</p></div></div></div>
+    <div class="col-md-4 mb-3"><div class="card"><div class="card-body"><h6 class="card-subtitle text-muted">Стоимость склада (закуп)</h6><p class="card-text fs-2 fw-bold">{{ format_currency_py(stats.total_stock_value_purchase) }}</p></div></div></div>
+    <div class="col-md-4 mb-3"><div class="card"><div class="card-body"><h6 class="card-subtitle text-muted">Стоимость склада (продажа)</h6><p class="card-text fs-2 fw-bold">{{ format_currency_py(stats.total_stock_value_sale) }}</p></div></div></div>
+</div>
+<div class="card mt-4">
+    <div class="card-header"><h5 class="mb-0">Управление данными</h5></div>
+    <div class="card-body">
+        <p>Синхронизация данных с облачным хранилищем Hugging Face.</p>
+        <form method="POST" action="{{ url_for('backup_hf') }}" class="d-inline me-2">
+            <button type="submit" class="btn btn-primary"><i class="fas fa-cloud-upload-alt me-1"></i> Сохранить в облако</button>
+        </form>
+        <form method="GET" action="{{ url_for('download_hf') }}" onsubmit="return confirm('ВНИМАНИЕ! Это перезапишет все локальные данные последней версией из облака. Продолжить?');" class="d-inline">
+            <button type="submit" class="btn btn-secondary"><i class="fas fa-cloud-download-alt me-1"></i> Загрузить из облака</button>
+        </form>
+    </div>
+</div>
+"""
+
+BASE_TEMPLATE = """
+<!DOCTYPE html>
+<html lang="ru" data-bs-theme="light">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>__TITLE__ - POS</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css">
+    <style>
+        :root { --sidebar-width: 260px; --topbar-height: 60px; }
+        body { background-color: #f3f4f6; }
+        .sidebar { position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh; background-color: #111827; padding-top: 1.5rem; }
+        .sidebar-brand { font-size: 1.5rem; font-weight: 700; color: white; text-decoration: none; }
+        .sidebar .nav-link { color: #9ca3af; font-weight: 500; padding: 0.75rem 1.5rem; margin: 0.125rem 0.5rem; border-radius: 0.375rem; }
+        .sidebar .nav-link:hover { color: #ffffff; background-color: #374151; }
+        .sidebar .nav-link.active { color: #ffffff; background-color: #4f46e5; }
+        .sidebar .nav-link i.fa-fw { width: 1.25em; margin-right: 0.75rem; }
+        .main-content { margin-left: var(--sidebar-width); padding: var(--topbar-height) 1.5rem 1.5rem; }
+        .topbar { position: fixed; top: 0; right: 0; left: var(--sidebar-width); height: var(--topbar-height); background: #ffffff; border-bottom: 1px solid #e5e7eb; padding: 0 1.5rem; display: flex; align-items: center; justify-content: space-between; z-index: 1020;}
+        .topbar-info { font-size: 0.9rem; color: #6b7280; }
+        .topbar-info i { color: #4f46e5; }
+        {% if no_sidebar %}
+        .main-content { margin-left: 0; }
+        .topbar { display: none; }
+        .sidebar { display: none; }
+        {% endif %}
+    </style>
+</head>
+<body>
+<div class="sidebar">
+    <div class="text-center pb-3 border-bottom border-secondary-subtle">
+        <a href="{{ url_for('pos') }}" class="sidebar-brand">
+            <i class="fas fa-cash-register"></i> POS
+        </a>
+    </div>
+    <nav class="nav flex-column sidebar-nav mt-3">
+        <a class="nav-link {% if request.endpoint == 'pos' %}active{% endif %}" href="{{ url_for('pos') }}"><i class="fas fa-fw fa-dollar-sign"></i>Касса</a>
+        <a class="nav-link {% if request.endpoint == 'inventory_page' %}active{% endif %}" href="{{ url_for('inventory_page') }}"><i class="fas fa-fw fa-boxes"></i>Инвентарь</a>
+        <a class="nav-link {% if request.endpoint == 'kassa_page' %}active{% endif %}" href="{{ url_for('kassa_page') }}"><i class="fas fa-fw fa-calculator"></i>Учет касс</a>
+        <a class="nav-link {% if request.endpoint == 'users_page' %}active{% endif %}" href="{{ url_for('users_page') }}"><i class="fas fa-fw fa-users"></i>Пользователи</a>
+        <a class="nav-link {% if request.endpoint == 'admin_panel' %}active{% endif %}" href="{{ url_for('admin_panel') }}"><i class="fas fa-fw fa-cog"></i>Админ</a>
+    </nav>
+    <div class="mt-auto p-3 text-center">
+        <a href="{{ url_for('logout') }}" class="btn btn-sm btn-outline-danger w-100">Выйти</a>
+    </div>
+</div>
+
+<div class="main-content">
+    <header class="topbar">
+        <h4 class="h5 mb-0">__TITLE__</h4>
+        {% if session.user_name %}
+        <div class="topbar-info">
+            <span class="me-3"><i class="fas fa-user me-1"></i> <strong>{{ session.user_name }}</strong></span>
+            <span><i class="fas fa-desktop me-1"></i> {{ session.kassa_name }}</span>
+        </div>
+        {% endif %}
+    </header>
+
+    <main>
+        {% with messages = get_flashed_messages(with_categories=true) %}
+          {% if messages %}
+            <div class="flash-messages mb-3">
+            {% for category, message in messages %}
+              <div class="alert alert-{{ category }} alert-dismissible fade show" role="alert">
+                {{ message }}
+                <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+              </div>
+            {% endfor %}
+            </div>
+          {% endif %}
+        {% endwith %}
+        __CONTENT__
+    </main>
+</div>
+
+<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
+<script>
+    function formatCurrencyJS(value) {
+        const number = parseFloat(String(value).replace(/\\s/g, '').replace(',', '.'));
+        return isNaN(number) ? '0,00' : number.toLocaleString('ru-RU', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
+    }
+</script>
+__SCRIPTS__
+</body>
+</html>
+"""
+
+@app.context_processor
+def inject_utils():
+    return {
+        'format_currency_py': format_currency_py,
+    }
+
+if __name__ == '__main__':
+    load_inventory()
+    load_sales()
+    load_users()
+    load_kassa()
+    backup_thread = threading.Thread(target=periodic_backup, daemon=True)
+    backup_thread.start()
+    app.run(debug=False, host='0.0.0.0', port=7860, use_reloader=False)