Remove refresh icon and fix Safari/WebKit runtime errors

- Removed manual refresh button from frontend (kept auto-refresh functionality)
- Fixed WebKit 'object cannot be found' error by replacing absolute positioning with flexbox
- Added lazy loading to images to prevent preload warnings
- Cleaned up unused imports and variables:
  - Removed unused useRef import
  - Removed unused colors state variable and colorService
  - Removed unused ColorSwatch import from FilamentTableV2
  - Removed unused getModifierIcon function from MaterialBadge
- Updated tests to match current implementation
- Improved layout stability for better cross-browser compatibility
- Removed temporary migration scripts

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/add-basic-refills.sql

@@ -0,0 +1,56 @@
+-- Add 1 refill and 1 spulna for each color as PLA Basic filaments
+-- Run this with: psql $DATABASE_URL -f scripts/add-basic-refills.sql
+
+-- First show what colors we have
+SELECT name, hex FROM colors ORDER BY name;
+
+-- Insert PLA Basic filaments with 1 refill and 1 spulna for each color that doesn't already have one
+INSERT INTO filaments (tip, finish, boja, boja_hex, refill, spulna, kolicina, cena)
+SELECT 
+    'PLA' as tip,
+    'Basic' as finish,
+    c.name as boja,
+    c.hex as boja_hex,
+    1 as refill,
+    1 as spulna,
+    2 as kolicina,  -- 1 refill + 1 spulna
+    '3999' as cena
+FROM colors c
+WHERE NOT EXISTS (
+    SELECT 1 FROM filaments f 
+    WHERE f.tip = 'PLA' 
+    AND f.finish = 'Basic' 
+    AND f.boja = c.name
+)
+ON CONFLICT DO NOTHING;
+
+-- Update any existing PLA Basic filaments to have 1 refill and 1 spulna
+UPDATE filaments
+SET refill = 1,
+    spulna = 1,
+    kolicina = 2  -- Update quantity to reflect 1 refill + 1 spulna
+WHERE tip = 'PLA' 
+AND finish = 'Basic'
+AND (refill = 0 OR spulna = 0);
+
+-- Show summary
+SELECT 
+    'Total PLA Basic filaments with refills and spulna' as description,
+    COUNT(*) as count 
+FROM filaments 
+WHERE tip = 'PLA' 
+AND finish = 'Basic' 
+AND refill = 1
+AND spulna = 1;
+
+-- Show all PLA Basic filaments
+SELECT 
+    boja as color,
+    refill,
+    spulna,
+    kolicina as quantity,
+    cena as price
+FROM filaments 
+WHERE tip = 'PLA' 
+AND finish = 'Basic'
+ORDER BY boja;