Add store-item Excel export/import for bulk price and stock updates.

Dashboard can download grouped product variants and re-upload to update price and stock. Also expose Content-Disposition for downloads and keep related product/customer API docs in sync.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/PROJECT_CONTEXT.md

@@ -1,7 +1,7 @@
 # Meshkee CMS API — Project Context
 
 > Living reference for developers and AI assistants working on this codebase.
-> Last updated: August 14, 2026
+> Last updated: August 18, 2026
 
 ## What This Project Is
 
@@ -504,6 +504,8 @@ PATCH /businesses/:businessId/store-items/variants/:variantId
 }
 ```
 
+**Bulk Excel (dashboard):** `GET /businesses/:businessId/store-items/export` downloads one row per variant (`variant_id`, names, variation, `price`, `stock`). `POST /businesses/:businessId/store-items/import` (multipart `file`) updates only price and stock. Empty price = call for price; empty stock = unlimited. Does not add or remove variants.
+
 ### Technical forms (product categories)
 
 - One form per product category

docs/website-api/AI_PROMPT.md

@@ -31,7 +31,7 @@ You are building a **Meshkee business website (storefront)**. You must use the M
 ### Typical bootstrap sequence
 1. `GET /tenants/{domain}` → branding + `businessId`
 2. Homepage: business-info, **static-images**, sliders, category-groups, brand-groups, store-specials
-3. Catalog: categories, products, store-items (`name` instant search: in-stock first, then `updatedAt`), **user-products** (customer stock listings)
+3. Catalog: categories, products (`GET /products/{slug}` includes `relatedProducts`: same category then same brand, in-stock first), store-items (`name` instant search: in-stock first, then `updatedAt`), **user-products** (customer stock listings)
 4. Auth: register/login → store tokens. Optional: `POST /auth/send-otp` then `POST /auth/login-otp` (passwordless) or `POST /auth/reset-password` (forgot password). `POST /auth/verify-otp` only marks the cell verified (no tokens).
 5. Cart checkout with `addressId` or inline `shippingAddress` + `payment`
    - For online pay: `payment.type = "e_payment_gate"`, `gatewayType` (e.g. `"mellat"` or `"zarinpal"`), and absolute `returnUrl`

docs/website-api/Meshkee-Website-API.postman_collection.json

@@ -1197,6 +1197,7 @@
           "name": "Get published product by slug",
           "request": {
             "method": "GET",
+            "description": "Product details plus relatedProducts (same category then same brand; in-stock first within each group).",
             "url": "{{baseUrl}}/tenants/{{domain}}/products/{{productSlug}}"
           }
         },

docs/website-api/openapi.json

@@ -449,7 +449,7 @@
         ],
         "responses": {
           "200": {
-            "description": "{ product }"
+            "description": "{ product, relatedProducts } — relatedProducts uses the product list-card shape (incl. store). Ranked by relativity (same category, then same brand) with availability beside it (in-stock first within each group). Up to 8 items; excludes the current product."
           }
         }
       }