fix: PA profiles not shown in AMS dialog for main extruder (extruder 0)

[BenJule]

Root cause

AMSMaterialsSetting::Popup requests the PA calibration history with this guard (introduced in the post-fix of commit 33b62ed / re-applied in 2263815):

int ext_id = obj->GetFilaSystem()->GetExtruderIdByAmsId(std::to_string(ams_id));
if (ext_id > 0) {          // ← BUG
    CalibUtils::emit_get_PA_calib_infos(cali_info);

MAIN_EXTRUDER_ID is 0 (defined in DevDefs.h:94). Any AMS unit bound to the first extruder returns ext_id = 0, which fails > 0, so the extrusion_cali_get MQTT command is never sent. The profile dropdown then contains only the hard-coded "Default" entry — even though the printer has saved profiles.

GetExtruderIdByAmsId returns -1 as its "not found" sentinel, so the correct guard is >= 0.

Fix

-        if (ext_id > 0) {
+        if (ext_id >= 0) {

One character. Extruder 0 now triggers the request; the -1 sentinel still suppresses it when the AMS ID is unknown.

Affected printers

Any printer where an AMS unit is bound to extruder 0 (virtually all single-extruder printers, and at least one AMS unit on dual-extruder printers like X2D). Reported as #10845.

Test plan

• Open AMS Materials Setting dialog for a filament slot on an AMS unit bound to extruder 0
• Confirm PA profile dropdown shows profiles saved on the printer, not just "Default"
• Open dialog for an AMS on extruder 1 (X2D) — profiles still shown
• AMS ID not found in fila system → ext_id = -1 → no request sent (no regression)

Closes #10845.

[BenJule]

Apologies — this PR was closed by mistake on 2026-06-07, and that was an error on my side, not a deliberate decision to withdraw the change.

It happened as an unintended side effect of a branch cleanup in my fork: deleting the head branch automatically closed this PR. The contribution still stands. I have restored the branch and reopened the PR. Sorry for the noise and any confusion this caused.