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>

database/migrations/010_fix_quantity_calculations.sql

@@ -0,0 +1,43 @@
+-- Fix quantity calculations to be the sum of refill + spulna counts
+UPDATE filaments 
+SET kolicina = 
+  COALESCE(
+    CASE 
+      WHEN refill ~ '^\d+$' THEN CAST(refill AS INTEGER)
+      ELSE 0
+    END, 0
+  ) + 
+  COALESCE(
+    CASE 
+      WHEN spulna ~ '^(\d+)\s*spuln' THEN 
+        CAST(SUBSTRING(spulna FROM '^(\d+)\s*spuln') AS INTEGER)
+      ELSE 0
+    END, 0
+  );
+
+-- Specifically fix refill-only colors to ensure quantity matches refill count
+UPDATE filaments 
+SET kolicina = 
+  CASE 
+    WHEN refill ~ '^\d+$' THEN CAST(refill AS INTEGER)
+    ELSE 0
+  END
+WHERE boja IN (
+  'Beige',
+  'Light Gray',
+  'Yellow',
+  'Orange',
+  'Gold',
+  'Bright Green',
+  'Pink',
+  'Magenta',
+  'Maroon Red',
+  'Purple',
+  'Turquoise',
+  'Cobalt Blue',
+  'Brown',
+  'Bronze',
+  'Silver',
+  'Blue Grey',
+  'Dark Gray'
+);