Merge dev into main

[rafaelurben]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors stock management functionality by extracting stock-related code from models into a dedicated utility class, improves email templates with better table structure and formatting, and fixes typos throughout the codebase.

• Extracts stock management logic from Order and Product models into a new StockUtils utility class
• Updates email templates with improved table layout and fixed CSS styling for better presentation
• Fixes spelling errors in variable names and documentation

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
kmuhelper/modules/main/utils.py	Adds new StockUtils class with refactored stock management functionality
kmuhelper/modules/main/models.py	Removes deprecated stock management methods from Order and Product models
kmuhelper/modules/main/admin.py	Updates admin to use new StockUtils class and adds stock warning email action
kmuhelper/modules/integrations/woocommerce/api/orders.py	Updates order creation to use new StockUtils for stock warnings
kmuhelper/templates/kmuhelper/emails/order_stock_warning.html	Improves table structure and adds trigger information display
kmuhelper/templates/kmuhelper/emails/base.html	Simplifies CSS and fixes postcontent typo
kmuhelper/modules/emails/models.py	Fixes postcontent variable name typo
docs/manual/emails.md	Updates documentation to reflect fixed variable name