Initial commit: swipe-to-zoom touchscreen navigation for socktop

Tiled socktop dashboard where a right-to-left swipe zooms into each host
full-screen and left-to-right walks back out.

The carousel is tmux pane zoom rather than separate socktop instances, so
there is one process per host: half the processes, no reconnect delay when
swiping back, and constant polling load on the monitored hosts.

Gestures come from lisgd because libinput emits gesture events only for
touchpads, never touchscreens, which rules out libinput-gestures entirely.

Documents the four gotchas found while building this: panels reporting 2-3
contacts for a one-finger swipe, X needing to ignore the panel so the
terminal and socktop stop competing for the same touches, tmux mouse mode
being incompatible with swipes, and lisgd not grabbing the device
exclusively so two instances double-fire.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

uninstall.sh

@@ -0,0 +1,44 @@
+#!/bin/sh
+# Remove socktop-swipe. Leaves lisgd, the 'input' group membership and your
+# socktop profiles alone -- those are useful independently and removing them
+# could break other things.
+#
+#   ./uninstall.sh            remove scripts, config and the X ignore rule
+#   ./uninstall.sh --keep-config   leave the config file in place
+set -eu
+
+PREFIX=${PREFIX:-/usr/local}
+BIN="$PREFIX/bin"
+CONF="$PREFIX/etc/socktop-swipe.env"
+XCONF=/etc/X11/xorg.conf.d/99-ignore-touch-socktop-swipe.conf
+
+keep_config=no
+[ "${1:-}" = "--keep-config" ] && keep_config=yes
+
+# Stop anything running. -x matches the exact process name; -f would also match
+# this script's own command line and kill the shell running it.
+pkill -x lisgd 2>/dev/null || true
+
+for f in socktop-rack socktop-swipe socktop-gestures; do
+	if [ -e "$BIN/$f" ]; then
+		sudo rm -f "$BIN/$f"
+		echo "removed $BIN/$f"
+	fi
+done
+
+if [ "$keep_config" = no ] && [ -e "$CONF" ]; then
+	sudo rm -f "$CONF"
+	echo "removed $CONF"
+fi
+
+if [ -e "$XCONF" ]; then
+	sudo rm -f "$XCONF"
+	echo "removed $XCONF (touch returns to X after the next X restart)"
+fi
+
+echo
+echo "Left in place on purpose:"
+echo "  * lisgd            -- remove with: sudo make -C ~/src/lisgd uninstall"
+echo "  * 'input' group    -- remove with: sudo gpasswd -d $(id -un) input"
+echo "  * i3 autostart     -- delete the 'socktop-swipe' block in ~/.config/i3/config"
+echo "  * socktop profiles -- ~/.config/socktop/profiles.json"