Below is the **complete HTML file** with a **fullscreen remote viewer** that works for **both participants** in a call. Every user sees the other person’s video/screen share with a **“Watch fullscreen” button** (and double‑click on the video) – so your friend can also full‑screen your video, and you can full‑screen theirs. All original features (text chat, file attachments, reactions, friend requests, servers, voice activity, etc.) are fully preserved. ```html Nexus Chat — Fullscreen Remote Viewer (Both Sides)

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