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maziggy
d196cfc500
BambuStudio's project_file MQTT command for O1C2 (the H2C dual- nozzle-rack variant) carries nozzle_mapping (per-filament physical nozzle position IDs) and nozzles_info (per-extruder rack metadata). The VP intake was dropping both, so the H2C firmware fell back to "last matching nozzle type" auto-pick and ignored the user's slicer choice — every HF print landed on R2, every standard print landed on R4. Carry both fields through the VP intake → queue item → MQTT dispatch path. New nullable TEXT columns on print_queue, non- branched ALTER (matches ams_mapping / filament_overrides precedent). Dual-nozzle gate at start_print() keeps the fields off single-nozzle dispatches. Fail-open on malformed JSON — firmware auto-picks, never worse than pre-fix. Stamps both fields on every plate in the multi-plate Send All loop (#1697 / #1188 precedent). ams_mapping2 still handles H2D/X2D dual-extruder routing unchanged; this fix is scoped to the O1C2 rack-swap mechanism.