fix(inventory): PA-Profil picker fetches K-profiles across all installed nozzles (#2618)

The Edit Spool "PA-Profil" tab and the SpoolBuddy write-tag page fetched a
printer's calibrations with getKProfiles(printer.id), which defaults the nozzle
filter to 0.4. The printer/MQTT layer filters strictly by that diameter, so on
a multi-nozzle printer a same-filament 0.6mm K-profile was never retrieved and
the picker showed only the 0.4mm entry ("1 match"). (The AMS-Slot config dialog
was already fixed in #1899; these two pickers were not.)

Add installedNozzleDiameters(status) and a shared fetchPrinterCalibrations()
that queries every reported nozzle diameter and merges the results, falling
back to 0.4 when the printer hasn't reported nozzle hardware. Each profile row
now shows a nozzle-diameter badge so identically-named profiles are distinct.

frontend/src/components/SpoolFormModal.tsx

@@ -8,7 +8,7 @@ import { Button } from './Button';
 import { useToast } from '../contexts/ToastContext';
 import type { SpoolFormData, PrinterWithCalibrations, ColorPreset } from './spool-form/types';
 import { defaultFormData, validateForm, SPOOLMAN_LINKED_FIELDS } from './spool-form/types';
-import { buildFilamentOptions, extractBrandsFromPresets, findPresetOption, loadRecentColors, parsePresetName, saveRecentColor } from './spool-form/utils';
+import { buildFilamentOptions, extractBrandsFromPresets, fetchPrinterCalibrations, findPresetOption, loadRecentColors, parsePresetName, saveRecentColor } from './spool-form/utils';
 import { MATERIALS } from './spool-form/constants';
 import { FilamentSection } from './spool-form/FilamentSection';
 import { ColorSection } from './spool-form/ColorSection';
@@ -201,21 +201,9 @@ export function SpoolFormModal({
               const connected = status?.connected ?? false;
               let calibrations: PrinterWithCalibrations['calibrations'] = [];
               if (connected) {
-                try {
-                  const kRes = await api.getKProfiles(printer.id);
-                  calibrations = kRes.profiles.map(p => ({
-                    cali_idx: p.slot_id,
-                    filament_id: p.filament_id,
-                    setting_id: p.setting_id || '',
-                    name: p.name,
-                    k_value: parseFloat(p.k_value) || 0,
-                    n_coef: parseFloat(p.n_coef) || 0,
-                    extruder_id: p.extruder_id,
-                    nozzle_diameter: p.nozzle_diameter,
-                  }));
-                } catch {
-                  // Printer may not support K-profiles
-                }
+                // Fetch across every installed nozzle so dual-nozzle printers
+                // surface both the 0.4mm and 0.6mm K-profiles, not just 0.4 (#2618).
+                calibrations = await fetchPrinterCalibrations(printer.id, status);
               }
               results.push({ printer: { ...printer, connected }, calibrations });
             }

frontend/src/components/spool-form/PAProfileSection.tsx

@@ -127,6 +127,11 @@ export function PAProfileSection({
           </span>
         </div>
         <div className="flex items-center gap-2 shrink-0">
+          {cal.nozzle_diameter && (
+            <span className="text-xs font-mono px-2 py-0.5 rounded bg-bambu-dark text-bambu-gray">
+              {cal.nozzle_diameter}mm
+            </span>
+          )}
           <span className="text-xs font-mono px-2 py-0.5 rounded bg-bambu-dark text-bambu-gray">
             K={cal.k_value.toFixed(3)}
           </span>

frontend/src/components/spool-form/utils.ts

@@ -1,7 +1,48 @@
+import { api } from '../../api/client';
 import type { SlicerSetting, LocalPreset, BuiltinFilament } from '../../api/client';
-import type { ColorPreset, FilamentOption } from './types';
+import { installedNozzleDiameters } from '../../utils/amsHelpers';
+import type { CalibrationProfile, ColorPreset, FilamentOption } from './types';
 import { KNOWN_VARIANTS, DEFAULT_BRANDS, RECENT_COLORS_KEY, MAX_RECENT_COLORS } from './constants';
 
+/**
+ * Fetch a printer's K-profiles across every nozzle it actually has installed
+ * (#2618) and flatten them into CalibrationProfile rows for the PA-Profil
+ * picker. `getKProfiles` filters strictly by nozzle diameter and defaults to
+ * "0.4", so a single call hides non-0.4 profiles (e.g. a 0.6mm PAHT-CF K
+ * value) — the picker then shows only one of two nozzle-specific profiles.
+ * We query each installed diameter and merge. Falls back to "0.4" when the
+ * printer hasn't reported nozzle hardware, preserving prior behaviour.
+ * Per-diameter failures are swallowed (a printer that doesn't support the
+ * endpoint just yields no rows), matching the callers' previous try/catch.
+ */
+export async function fetchPrinterCalibrations(
+  printerId: number,
+  status: { nozzles?: { nozzle_diameter?: string }[] } | null | undefined,
+): Promise<CalibrationProfile[]> {
+  const diameters = installedNozzleDiameters(status);
+  const toFetch = diameters.length > 0 ? diameters : ['0.4'];
+  const responses = await Promise.all(
+    toFetch.map(d => api.getKProfiles(printerId, d).catch(() => null)),
+  );
+  const calibrations: CalibrationProfile[] = [];
+  for (const res of responses) {
+    if (!res) continue;
+    for (const p of res.profiles) {
+      calibrations.push({
+        cali_idx: p.slot_id,
+        filament_id: p.filament_id,
+        setting_id: p.setting_id || '',
+        name: p.name,
+        k_value: parseFloat(p.k_value) || 0,
+        n_coef: parseFloat(p.n_coef) || 0,
+        extruder_id: p.extruder_id,
+        nozzle_diameter: p.nozzle_diameter,
+      });
+    }
+  }
+  return calibrations;
+}
+
 // Fallback filament presets when cloud is not available
 const FALLBACK_PRESETS: FilamentOption[] = [
   { code: 'GFL00', name: 'Bambu PLA Basic', displayName: 'Bambu PLA Basic', isCustom: false, allCodes: ['GFL00'] },