Refactor ssh&users

modules/lib/rbw-ssh-socket.nix

@@ -1,6 +1,7 @@
 { ... }: {
   flake.lib.rbwSshSocket =
     let
+      # Bash/Fish init snippets — used by wisdom/shells/{bash,fish}.nix.
       bashSnippet = ''
         if [ -z "''${SSH_AUTH_SOCK:-}" ]; then
           if [ -n "''${XDG_RUNTIME_DIR:-}" ]; then
@@ -21,10 +22,10 @@
             end
           end
         '';
-    in
-    {
+    in {
       inherit bashSnippet fishSnippet;
+      # Used by home-manager modules to expose SSH_AUTH_SOCK to GUI apps
+      # and HM-managed shells declaratively (no activation script needed).
       sessionVariable = "$XDG_RUNTIME_DIR/rbw/ssh-agent-socket";
-      activationPath = "/run/user/$(id -u)/rbw/ssh-agent-socket";
     };
 }