Two bugs caused spool assignments to always configure AMS slots with
generic Bambu filament IDs (e.g. GFB99 "Generic ABS") instead of the
spool's actual slicer preset:
1. PFUS* IDs (cloud-synced custom presets) were blanket-rejected and
replaced with generic IDs in both assign_spool and configure_ams_slot
2. Generic fallback IDs (GFB99, GFL99, etc.) were treated as "good"
presets by the slot-reuse logic, making them sticky once set
New priority: spool's own slicer_filament > slot's non-generic preset
(same material) > generic fallback.
BambuStudio actively resets AMS slots configured with unrecognized PFUS*
(user-local) preset IDs. Replace PFUS* with generic Bambu filament IDs
(e.g. GFL99 for PLA) in both the slot configure and inventory assignment
endpoints. When the slot already has a recognized cloud-synced preset for
the same material, reuse it to preserve K-profile calibration.
Also fix fill level bar not showing for brand new spools (weight_used=0)
by changing the condition from weight_used > 0 to weight_used != null.
maziggy