Add equipment loan feature and USB bulk control

- Add emprestimos (equipment loan) module in Convex with queries/mutations
- Create emprestimos page with full CRUD and status tracking
- Add USB bulk control to admin devices overview
- Fix Portuguese accents in USB policy control component
- Fix dead code warnings in Rust agent
- Fix tiptap type error in rich text editor

src/components/ui/rich-text-editor.tsx

@@ -646,7 +646,8 @@ const TicketMentionExtension = Mention.extend({
     const extensionName = this.name
     return ({ node }: { node: { attrs: TicketMentionAttributes; type: { name: string } } }) => {
       if (typeof document === "undefined") {
-        return {}
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        return null as any
       }
 
       const root = document.createElement("a")