Add zmx multiplexer support

.gitignore

@@ -12,3 +12,6 @@ rootshell/Resources/rootshellvpn.app/
 # Developer ID provisioning profiles (account-specific, place locally)
 scripts/*.provisionprofile
 .DS_Store
+
+# Local zmx test environment: Linux zmx binaries and an SSH private key.
+docs/zmx-testenv/

CHANGELOG.md

@@ -3,6 +3,17 @@
 All notable changes to the rootshell app for iPhone, iPad, Vision Pro, and Mac, newest first.
 Versions are listed as `release-build`, matching the version shown in Settings, About.
 
+## Unreleased
+
+### zmx
+
+- **zmx Session Discovery:** Connecting to a host running zmx now lists its sessions in the session picker, with the attached-client count, when each was created, any labels you have set, and a live preview of the session's screen. Tapping one attaches to it. Sessions whose socket has gone stale are left out, and hosts that merely have zmx installed stay quiet — the picker only appears when there is a real session to offer. Works against zmx 0.7.0 and newer.
+- **Auto-Start zmx:** The per-connection "Auto-start multiplexer" option gains zmx alongside Off, tmux, tmux -CC and herdr. zmx auto-start attaches to your session or creates it on first use, works under ssh, mosh and tssh, and syncs across devices. Settings gains a zmx discovery toggle and an Auto-Start page for the session name and an optional custom command, with a preview of the exact command that will run.
+
+### Multiplexers
+
+- **Consistent Multiplexer Icons:** The Multiplexers settings screen and the session picker drew different icons for the same multiplexer — tmux and zellij had theirs swapped between the two screens. Each multiplexer now has one icon used everywhere.
+
 ## 1.0.11-137 - August 23, 2026
 
 ### Mosh