feat: Add 3dfilamentprofiles.com integration (Issue #7)

- Backend: Added ExternalSource enum, Filament3DFP model, and transform function
- Backend: Updated _sync() to fetch from both SpoolmanDB and 3dfilamentprofiles
- Frontend: Added source tabs to FilamentImportModal (All/SpoolmanDB/3DFP)
- Frontend: Updated ExternalFilament interface with source and temp range fields
- Frontend: Updated filament import handler to use temp range fields

Also includes:
- Dev mode styling (teal theme, DEV badge and banner)
- Translation keys for source filtering

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

client/src/pages/spools/functions.tsx

@@ -190,6 +190,7 @@ export function useGetFilamentSelectOptions() {
     internalSelectOptions: filamentSelectInternal,
     externalSelectOptions: filamentSelectExternal,
     allExternalFilaments: externalFilaments.data,
+    refetch: internalFilaments.refetch,
   };
 }