feat(pos): register invoicing + accounting blueprints

pos/app.py

@@ -25,6 +25,12 @@ def create_app():
     from blueprints.cashregister_bp import cashregister_bp
     app.register_blueprint(cashregister_bp)
 
+    from blueprints.invoicing_bp import invoicing_bp
+    app.register_blueprint(invoicing_bp)
+
+    from blueprints.accounting_bp import accounting_bp
+    app.register_blueprint(accounting_bp)
+
     # Health check
     @app.route('/pos/health')
     def health():
@@ -52,6 +58,14 @@ def create_app():
     def pos_customers():
         return render_template('customers.html')
 
+    @app.route('/pos/invoicing')
+    def pos_invoicing():
+        return render_template('invoicing.html')
+
+    @app.route('/pos/accounting')
+    def pos_accounting():
+        return render_template('accounting.html')
+
     @app.route('/pos/static/<path:filename>')
     def pos_static(filename):
         return send_from_directory('static', filename)