docs: point terminal users at codeman tui instead of the sc chooser

codeman tui supersedes the sc bash chooser: it reaches sessions 10+,
carries the server's real states instead of a static list, and leaves an
attach with one key. Every place that told a user to run sc now names the
tui equivalent, including the two wiki pages and install.sh's next-steps
banner. Both wiki pages also carried the wrong detach chord (Ctrl+A D;
the socket's prefix is C-b), which the tui makes moot.

Source comments that explained themselves as "the sc -l replacement" now
just say what they do. docs/tui-plan.md and CHANGELOG.md are historical
records and keep their references.

install.sh

@@ -2450,9 +2450,9 @@ main() {
 
     echo -e "  ${BOLD}Mobile Access (Termius/SSH):${NC}"
     echo ""
-    echo -e "    ${CYAN}sc${NC}              # Interactive tmux session chooser"
-    echo -e "    ${CYAN}sc 2${NC}            # Quick attach to session 2"
-    echo -e "    ${CYAN}sc -h${NC}           # Help"
+    echo -e "    ${CYAN}codeman tui${NC}     # Full-screen session dashboard"
+    echo -e "    ${CYAN}codeman tui 2${NC}   # Attach straight to session 2"
+    echo -e "    ${CYAN}codeman tui -l${NC}  # Numbered list, then exit"
     echo ""
 
     echo -e "  ${BOLD}Documentation:${NC}"