Implement boxes management module with auto-numbered box creation

- Add boxes_crates database table with BIGINT IDs and 8-digit auto-numbered box_numbers
- Implement boxes CRUD operations (add, edit, update, delete, delete_multiple)
- Create boxes route handlers with POST actions for all operations
- Add boxes.html template with 3-panel layout matching warehouse locations module
- Implement barcode generation and printing with JsBarcode and QZ Tray integration
- Add browser print fallback for when QZ Tray is not available
- Simplify create box form to single button with auto-generation
- Fix JavaScript null reference errors with proper element validation
- Convert tuple data to dictionaries for Jinja2 template compatibility
- Register boxes blueprint in Flask app initialization

app/modules/warehouse/boxes_routes.py

@@ -0,0 +1,101 @@
+"""
+Boxes Management Routes
+"""
+from flask import Blueprint, render_template, session, redirect, url_for, request, flash
+from app.modules.warehouse.boxes import (
+    get_all_boxes, add_box, update_box, delete_box, delete_multiple_boxes, 
+    get_box_by_id, get_box_stats, ensure_boxes_table
+)
+from app.modules.warehouse.warehouse import get_all_locations
+import logging
+
+logger = logging.getLogger(__name__)
+
+boxes_bp = Blueprint('boxes', __name__, url_prefix='/warehouse/boxes')
+
+
+@boxes_bp.route('/', methods=['GET', 'POST'])
+def manage_boxes():
+    """Manage warehouse boxes page"""
+    if 'user_id' not in session:
+        return redirect(url_for('main.login'))
+    
+    # Ensure table exists
+    ensure_boxes_table()
+    
+    message = None
+    message_type = 'info'
+    
+    if request.method == 'POST':
+        action = request.form.get('action', '')
+        user_id = session.get('user_id', 'System')
+        
+        # Add new box (auto-numbered)
+        if action == 'add_box':
+            success, msg = add_box(created_by=user_id)
+            message = msg
+            message_type = 'success' if success else 'danger'
+        
+        # Update box status or location
+        elif action == 'edit_box':
+            box_id = request.form.get('box_id', '')
+            status = request.form.get('status', '')
+            location_id = request.form.get('location_id', '')
+            
+            location_id = int(location_id) if location_id and location_id.isdigit() else None
+            
+            success, msg = update_box(box_id, status=status if status else None, location_id=location_id)
+            message = msg
+            message_type = 'success' if success else 'danger'
+        
+        # Change status
+        elif action == 'toggle_status':
+            box_id = request.form.get('box_id', '')
+            current_status = request.form.get('current_status', 'open')
+            new_status = 'closed' if current_status == 'open' else 'open'
+            
+            success, msg = update_box(box_id, status=new_status)
+            message = msg
+            message_type = 'success' if success else 'danger'
+        
+        # Delete single box
+        elif action == 'delete_box':
+            box_id = request.form.get('box_id', '')
+            success, msg = delete_box(box_id)
+            message = msg
+            message_type = 'success' if success else 'danger'
+        
+        # Delete multiple boxes
+        elif action == 'delete_multiple':
+            box_ids = request.form.get('delete_ids', '')
+            success, msg = delete_multiple_boxes(box_ids)
+            message = msg
+            message_type = 'success' if success else 'danger'
+    
+    # Get data and convert tuples to dictionaries
+    boxes_data = get_all_boxes()
+    boxes = []
+    for box_tuple in boxes_data:
+        boxes.append({
+            'id': box_tuple[0],
+            'box_number': box_tuple[1],
+            'status': box_tuple[2],
+            'location_code': box_tuple[3],
+            'created_at': box_tuple[4],
+            'updated_at': box_tuple[5],
+            'created_by': box_tuple[6],
+            'location_id': box_tuple[7]
+        })
+    
+    locations = get_all_locations()
+    stats = get_box_stats()
+    
+    return render_template(
+        'modules/warehouse/boxes.html',
+        boxes=boxes,
+        locations=locations,
+        stats=stats,
+        message=message,
+        message_type=message_type
+    )
+