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.

docs/pi-integration.md

@@ -139,7 +139,7 @@ set -g extended-keys-format csi-u
 
 Codeman's browser input path sends `\r` for submit, so basic use works
 unconfigured — what degrades is newline-in-editor, mostly when you attach to the
-pane directly (`sc`).
+pane directly (`codeman tui`).
 
 ⚠️ Upstream notes the setting may need a full `tmux kill-server` to take effect.
 **Never run `tmux kill-server` on Codeman's socket** — it would kill every live