The TUI banner footer used the raw `info.mcp_servers.length`, so a
configured-but-disabled server (e.g. `linear`) was counted alongside
connected ones. With a disabled `linear` and a connected `nous-support`,
the TUI reported "2 MCP" while the classic CLI correctly reported "1 MCP"
(`mcp_connected = sum(1 for s in mcp_status if s["connected"])` in
hermes_cli/banner.py).
The collapse toggle even labels the count "connected", which was wrong
for the same reason.
Count connected servers for both the toggle and the footer segment, and
drop the `· N MCP` segment entirely when none are connected (matching the
classic banner, which only appends it when the count is > 0). The
expandable MCP section still lists every configured server, including
disabled ones.
Invariant test renders SessionPanel and asserts the headline equals the
connected count, never the configured total.