fix edit on products

backend/scripts/fix-categories.sql

@@ -0,0 +1,38 @@
+-- Fix duplicate categories and clean up product categories
+-- This will consolidate similar categories and fix naming
+
+-- Update products that reference categories we're about to merge
+-- Update any references to 'Fertilizers' to point to 'Fertilizer' (if it exists)
+UPDATE products SET category_id = (
+    SELECT id FROM product_categories WHERE name = 'Fertilizer' LIMIT 1
+) WHERE category_id = (
+    SELECT id FROM product_categories WHERE name = 'Fertilizers' LIMIT 1
+) AND EXISTS (SELECT 1 FROM product_categories WHERE name = 'Fertilizer');
+
+-- Delete duplicate categories
+DELETE FROM product_categories WHERE name IN ('Fertilizers') 
+AND EXISTS (SELECT 1 FROM product_categories WHERE name = 'Fertilizer');
+
+-- Update category names to be consistent (singular form)
+UPDATE product_categories SET name = 'Herbicide' WHERE name = 'Herbicides';
+UPDATE product_categories SET name = 'Fertilizer' WHERE name = 'Fertilizers';
+UPDATE product_categories SET name = 'Fungicide' WHERE name = 'Fungicides';
+UPDATE product_categories SET name = 'Insecticide' WHERE name = 'Insecticides';
+UPDATE product_categories SET name = 'Surfactant' WHERE name = 'Surfactants';
+UPDATE product_categories SET name = 'Adjuvant' WHERE name = 'Adjuvants';
+UPDATE product_categories SET name = 'Growth Regulator' WHERE name = 'Growth Regulators';
+
+-- Add any missing core categories
+INSERT INTO product_categories (name, description) VALUES
+('Herbicide', 'Products for weed control and prevention'),
+('Fertilizer', 'Nutrients for lawn growth and health'),
+('Fungicide', 'Products for disease prevention and treatment'),
+('Insecticide', 'Products for insect control'),
+('Pre-emergent', 'Products that prevent weeds from germinating'),
+('Post-emergent', 'Products that kill existing weeds'),
+('Growth Regulator', 'Products that modify plant growth'),
+('Surfactant', 'Products that improve spray coverage and penetration'),
+('Adjuvant', 'Products that enhance pesticide performance'),
+('Seed', 'Grass seeds and seed treatments'),
+('Soil Amendment', 'Products that improve soil conditions')
+ON CONFLICT (name) DO NOTHING;