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/utils/queryExternalDB.ts

@@ -22,25 +22,33 @@ export enum Pattern {
   SPARKLE = "sparkle",
 }
 
+export enum ExternalSource {
+  SPOOLMANDB = "spoolmandb",
+  FILAMENT_PROFILES_3D = "3dfilamentprofiles",
+}
+
 export interface ExternalFilament {
   id: string;
   manufacturer: string;
   name: string;
   material: string;
   density: number;
-  weight: number;
+  weight?: number;
   spool_weight?: number;
   spool_type?: SpoolType;
   diameter: number;
   color_hex?: string;
   color_hexes?: string[];
   extruder_temp?: number;
+  extruder_temp_max?: number;
   bed_temp?: number;
+  bed_temp_max?: number;
   finish?: Finish;
   multi_color_direction?: MultiColorDirection;
   pattern?: Pattern;
   translucent: boolean;
   glow: boolean;
+  source?: ExternalSource;
 }
 
 export interface ExternalMaterial {