* fix(mcp): make Add Server + Catalog headers read distinctly from buttons Both section headers reused the shared SectionHeader, which paints the title in primary/bold — so each header row looked like a tappable button next to its trailing TextButton. Add a scoped McpSectionHeader with a distinct leading icon (➕ Add / 🗄 Explore) and a neutral onSurface bold title, so they read as headers and look different from each other. * fix(mcp): give section header row + action button distinct backgrounds - Whole header row now sits on a surfaceContainerLow rounded (12dp) surface so it reads as a contained section header, not bare text. - The trailing New/Browse action uses secondaryContainer (onSecondaryContainer text) — a clearly different color from the row background, so button vs header are visually distinct. --------- Co-authored-by: M57 <hy4ri@users.noreply.github.com>