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When the printer reports ams_filament_backup=True,
compute_deficit_for_queue_item pools remaining_grams across spools
matching (preset, colour) on the same printer (scoped per extruder on
dual-nozzle) before declaring a per-slot shortfall. Identity is strict:
same slicer_filament preset AND same colour (alpha-normalised). Two
PETG HF spools in different colours are NOT pooled — the firmware would
swap correctly but the print would change colour mid-run. Spoolman side
mirrors the rule via filament.id + color_hex. Backup OFF falls back to
the pre-PR per-slot accounting line-for-line.
8 new test cases in TestFilamentDeficitBackupAware pin pool covers,
pool insufficient, different presets, backup-OFF regression, dual-
extruder side scoping, no-preset never pairs, colour-strict, and
alpha-hex normalisation. The 8 pre-existing test_filament_deficit.py
cases stay green.
feat(printers): AMS Filament Backup modal with BS-style ring per pair
Badge click on the Filaments section header (#1766) now opens a
modal: filament-colour ring per backup pair, material name + rotation
count in the centre, slot labels distributed around the colour band on
contrast-aware pills. Closely modelled on Bambu Studio's Auto Refill
widget. Lone slots are intentionally not listed. R / L badges per ring
when the extruder map carries two distinct values; collapses to no-
badge rendering for single-nozzle printers misflagged as dual.
Esc keypress closes the modal. Theme-aware via CSS variables matching
AMSHistoryModal. computeBackupGroups helper in utils/amsHelpers
defensively dedupes duplicate ams.id entries observed on switch-VP
aggregations.
10 modal render cases pin: Esc closes / unmount nulls the listener /
ring renders for pairs and omits lone slots / R-L badges only when
extruder map has distinct values / empty state / toggle gating.
13 frontend cases pin computeBackupGroups identity rules.
feat(printers): active-print P-N pill on AMS slot tiles during RUNNING
While the printer is mid-print, each AMS slot tile referenced by
status.ams_mapping carries a small "P1 / P2 / P3" pill in the top-
right corner, naming which print-slot is mapped to that AMS slot.
Catches the #1762 comment-2 scenario: a queue job set for "any X1C"
staged to a printer with mismatched filament, no way to verify mid-
print. Same wire data (status.ams_mapping is already on the wire) —
the addition is purely surface.
The existing ring-bambu-green highlight for effectiveTrayNow keeps its
meaning (currently extruding RIGHT NOW); the pill is the per-slot
static assignment for the active print.
chore(scheduler): log Print Anyway short-circuit at INFO
_block_on_filament_deficit logs at INFO when it honours
item.skip_filament_check, so a future "Print Anyway didn't work" report
(third commenter on #1762 hit this shape) has actionable evidence in
the standard support bundle without DEBUG. Bundled because the deficit
fix makes the original symptom disappear for users with backup ON.