type / to open command palette; fix missing paren in process-key-event

When / is typed on an empty input with no dialog open, open the
command palette with "/" pre-filled in the filter instead of
inserting / into the text buffer. Ctrl+P still opens the palette
without a pre-filled filter.

org/channel-tui-state.org

@@ -24,8 +24,8 @@ All state mutation flows through event handlers in the controller.
            :queue-event :drain-queue :init-state
             :view-status :view-chat :view-input :redraw
             :input-panel-top
-           :on-key :on-daemon-msg :send-daemon
-           :connect-daemon :disconnect-daemon
+            :on-key :process-key-event :input-text :on-daemon-msg :send-daemon
+            :connect-daemon :disconnect-daemon
             :*theme* :theme-color :theme-switch))
 (in-package :passepartout.channel-tui)