refactor: standardise S3 URL generation (#362)

* refactor: replace presigned URL uploads with backend upload endpoints

* feat: update avatar upload to use new endpoint

* refactor: use createS3Client in auth hooks

* feat: generate presigned URLs for avatars

* fix: show avatar image in user menu

* fix: hide tooltip if content is empty

* fix: support external avatar URLs in generateAvatarUrl

* fix: remove content type restriction on attachments

apps/web/src/components/Tooltip.tsx

@@ -7,7 +7,7 @@ import tippy from "tippy.js";
 
 interface TooltipProps {
   children: ReactNode;
-  content: ReactNode;
+  content?: ReactNode;
   placement?: Placement;
   delay?: number | [number, number];
 }
@@ -24,6 +24,8 @@ export function Tooltip({
   useEffect(() => {
     if (!triggerRef.current) return;
 
+    if (!content) return;
+
     const container = document.createElement("div");
     const root = createRoot(container);
     rootRef.current = root;