docs: clarify local browser scope for share presence

Co-authored-by: ThisIs-Developer <109382325+ThisIs-Developer@users.noreply.github.com>
Agent-Logs-Url: https://github.com/ThisIs-Developer/Markdown-Viewer/sessions/c9f0ce95-5f5b-495d-be1f-1df388f75c8e

Author: Copilot

wiki/Features.md

@@ -183,7 +183,7 @@ The **Share** feature encodes your Markdown content into the page URL hash, allo
 
 Recipients open the link and see your document pre-loaded in the editor. No server or sign-in required.
 
-When a shared `#share=` URL is open, the app also shows lightweight local **presence avatars** (animal icons) for people currently using that same share link in their browser on the same device profile. Each user gets a generated name in the `<Adjective> <Noun>` format, active users are highlighted with a green shared-session frame, and if more than 4 users are present, extras are grouped under a hover dropdown (`+N`).
+When a shared `#share=` URL is open, the app also shows lightweight local **presence avatars** (animal icons) for people currently using that same share link in their browser. Each user gets a generated name in the `<Adjective> <Noun>` format, active users are highlighted with a green shared-session frame, and if more than 4 users are present, extras are grouped under a hover dropdown (`+N`).
 
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