feat(cli): help, and right-click copy and paste in the interactive chat

help prints what --help prints; help ACTION, what ACTION --help prints.

In the interactive chat a right-click on the conversation copies the text
selected with the mouse, else the line under the pointer: to the terminal
(OSC 52) and to the platform's clipboard tool. A right-click on the line
written in pastes the system clipboard's text at the cursor, its lines side
by side, read with wl-paste, xclip or xsel, pbpaste or PowerShell, else what
was copied here last. The conversation is selectable with the mouse, which
RichLog alone is not. The deb and rpm packages recommend wl-clipboard or
xclip for the paste.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/packages/meshbay-cli/tests/test_cli_actions.py b/packages/meshbay-cli/tests/test_cli_actions.py
index 5443d9b..240ac67 100644
--- a/packages/meshbay-cli/tests/test_cli_actions.py
+++ b/packages/meshbay-cli/tests/test_cli_actions.py
@@ -203,6 +203,19 @@ def test_a_usage_error_is_exit_1_not_the_sign_in_code(capsys):
 
 
 
+def test_help_prints_what_help_prints(capsys):
+    assert cli.main(["--help"]) == 0
+    whole = capsys.readouterr().out
+    assert main("help") == 0
+    assert capsys.readouterr().out == whole
+    assert cli.main(["chat", "--help"]) == 0
+    chat = capsys.readouterr().out
+    assert main("help", "chat") == 0
+    assert capsys.readouterr().out == chat
+    assert main("help", "no-such-action") == 1
+    assert "No action 'no-such-action'" in capsys.readouterr().err
+
+
 def test_groups_lists_each_group_with_its_state(hub, capsys):
     hub.groups.append({"id": "g2", "name": "Club/Photos", "owner_username": "bob-test",
                        "node_online": False, "visibility": "public", "is_admin": False,