Fix refill-only colors to have 0 spools instead of 1

- Add migration to correct 14 colors that should be refill-only
- Create helper script for applying the fix
- Add frontend tracking for refill-only colors
- Update README with current project state
- Add development guidance documentation

scripts/fix-refill-only-colors.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# Script to fix refill-only colors that incorrectly have spool availability
+# These colors should have spulna = 0 (no regular spools available)
+
+echo "🔧 Fixing refill-only colors to have 0 spools..."
+
+# Colors that should be refill-only
+REFILL_ONLY_COLORS=(
+    "Nardo Gray"
+    "Blue Grey"
+    "Light Gray"
+    "Brown"
+    "Beige"
+    "Bronze"
+    "Purple"
+    "Cobalt Blue"
+    "Turquoise"
+    "Bright Green"
+    "Yellow"
+    "Gold"
+    "Orange"
+    "Maroon Red"
+)
+
+# Database connection details
+DB_HOST="filamenteka.ci7fsdlbzmag.eu-central-1.rds.amazonaws.com"
+DB_NAME="filamenteka"
+DB_USER="filamenteka_admin"
+DB_PASSWORD="onrBjiAjHKQXBAJSVWU2t2kQ7HDil9re"
+
+echo "📊 Current status of refill-only colors:"
+PGPASSWORD=$DB_PASSWORD psql -h $DB_HOST -U $DB_USER -d $DB_NAME -c "
+SELECT boja, refill, spulna, kolicina 
+FROM filaments 
+WHERE tip = 'PLA' 
+AND finish = 'Basic'
+AND boja IN (
+    'Nardo Gray', 'Blue Grey', 'Light Gray', 'Brown', 'Beige',
+    'Bronze', 'Purple', 'Cobalt Blue', 'Turquoise', 'Bright Green',
+    'Yellow', 'Gold', 'Orange', 'Maroon Red'
+)
+ORDER BY boja;"
+
+echo ""
+echo "🔄 Applying fix..."
+
+# Apply the migration
+PGPASSWORD=$DB_PASSWORD psql -h $DB_HOST -U $DB_USER -d $DB_NAME < database/migrations/015_fix_refill_only_colors.sql
+
+echo ""
+echo "✅ Fix applied! New status:"
+PGPASSWORD=$DB_PASSWORD psql -h $DB_HOST -U $DB_USER -d $DB_NAME -c "
+SELECT boja, refill, spulna, kolicina 
+FROM filaments 
+WHERE tip = 'PLA' 
+AND finish = 'Basic'
+AND boja IN (
+    'Nardo Gray', 'Blue Grey', 'Light Gray', 'Brown', 'Beige',
+    'Bronze', 'Purple', 'Cobalt Blue', 'Turquoise', 'Bright Green',
+    'Yellow', 'Gold', 'Orange', 'Maroon Red'
+)
+ORDER BY boja;"
+
+echo ""
+echo "🎉 Refill-only colors have been fixed!"