LuLu Sales Dashboard — data update templates
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1. Sales_Template.xlsx  -> upload as sales_file
   Sheets (channels): Ecom, Hungerstation, Trendyol, Hypermarket
   Regions (Qty then Value columns): AKB, JED, RUH
   A sheet with a single Qty + single Value column is booked to its home region
   (Trendyol sells in Riyadh (RUH) only). Region columns, if added later, are read
   automatically from the header text.
   Hypermarket is the company total and INCLUDES the online channels.

2. Vendor_Template.xlsx -> upload as vendor_file
   Sheet 'Data' with GR Value (Till July) and Performance /fill rate %.

3. Classification_Mapping.xlsx -> upload as class_file (optional)
   Contains the CURRENT live mapping; edit it to re-map departments.
   If you do not upload it, the last saved mapping keeps applying.

New months, regions, departments, categories, brands and classifications are
picked up automatically — nothing is hardcoded in the dashboard.
