feat(cli): meshbay-cli, a command-line client for members

Signs in to the hub, lists the account's groups and their folders, and
downloads and uploads files directly with each group's node, end-to-end
encrypted. With no argument it opens a two-pane interactive mode (Textual).
Session and device keys are kept encrypted under the system's key storage,
or a 0600 key file where there is none; node keys are pinned at first
contact; a new machine links as a device.

Packaged on its own on Linux (deb and rpm, on meshbay-common's venv, with a
man page generated from the parser) and frozen next to meshbay-node in the
full Windows installer, not the light one, with a self-test the build runs.
client/keys.py ports keyderive.js and is LGPL like it.

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

1 files changed, 18 insertions, 0 deletions

diff --git a/packaging/deb/meshbay-cli/DEBIAN/prerm b/packaging/deb/meshbay-cli/DEBIAN/prerm
new file mode 100755
index 0000000..96e5930
--- /dev/null
+++ b/packaging/deb/meshbay-cli/DEBIAN/prerm
@@ -0,0 +1,18 @@
+#!/bin/sh
+set -e
+
+# The client's files live in meshbay-common's venv, whose own cleanup runs only
+# after this package is gone: the bytecode compiled next to them is removed
+# here, or dpkg cannot remove the directories it sits in.
+case "$1" in
+    remove|upgrade|deconfigure)
+        site=$(echo /opt/meshbay-common/venv/lib/python3.*/site-packages)
+        while IFS= read -r entry; do
+            [ -n "$entry" ] && [ -d "$site/$entry" ] || continue
+            find "$site/$entry" -depth -type d -name __pycache__ \
+                -exec rm -rf {} + 2>/dev/null || true
+        done < /opt/meshbay-cli/site-packages.list
+        ;;
+esac
+
+#DEBHELPER#