ZOtero not responding on word - App installed and open, ribbon not working

Title: Word Add/Edit Citation button does nothing — ribbon tab not recognized by Word
Body:

Zotero 9.0.5 (ARM64), Windows 11, Word for Microsoft 365 (personal install, Snapdragon X Plus / Windows on ARM).
The Zotero tab and buttons (Add/Edit Citation, etc.) appear in Word's ribbon, but clicking them does absolutely nothing — no error, no dialog. Debug logging confirms Zotero receives no request at all when the button is clicked.
Oddly, the "Zotero" tab doesn't appear in File → Options → Customize Ribbon → Main Tabs list, even though it's visible and clickable in the actual ribbon.
In File → Options → Add-ins → COM Add-ins, Zotero shows as "Zotero.dotm Template" rather than a standard add-in entry.
I've already tried: fully uninstalling/reinstalling Zotero (ARM64 build), resetting Normal.dotm to a fresh default, clearing Zotero.dotm from the Word STARTUP folder, checking Trust Center (all Add-in restrictions unticked), and confirming Zotero.dotm is present in STARTUP after reinstall.
This started after I made some manual changes to Word/Zotero files following AI-assisted troubleshooting (renamed/moved Normal.dotm, deleted/recreated Zotero.dotm), so something may be misconfigured at a level I haven't been able to identify.

All started when I was trying to ensure my hyperlinks would work in my reference list as there was a problem with my last assignment. Troubleshooted with above and now it's all not working!
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