SMM X PRO V21 — Responsive Admin / Live Support

- Redesigned admin panel layout for desktop, tablet and mobile widths.
- Live Support now uses a stable two-pane desktop layout and single-pane mobile layout.
- Added smoother scrolling, compact mobile composer, safe viewport sizing, and better touch targets.
- Incoming/outgoing support pictures remain supported and now open in a full-screen viewer when tapped.
- Pictures use contain sizing so they are not cropped on PC or mobile.
- Removed unused Bot Elements and Custom Emoji admin files; they are not part of the navigation.
- Existing service pool, serial priority and 5-active/pending-per-provider-ID logic preserved.