How Stock and Reserved Stock Tracking Works

Source: autosoft-workshop/app/models/invoice.rb, products_controller.rb

• Reserved stock only visible on Gold+ subscription
• Voiding invoice reverses stock quantities — dangerous if manually corrected since posting
• Branch products start with 0 quantity when copied
• Labor items cannot have flat rates
• If reserved_stock flag is toggled off, all reservations are orphaned

Support scenarios

• "Stock numbers are wrong" → voided invoice reversed manual corrections
• "Product quantity reset to 0" → copied from another branch