fix: run manage in service directory

for everything else it will error on CHDIR, even if $PWD has the right owner and permissions.

panel/nix/configuration.nix

@@ -58,13 +58,13 @@ let
     text =
       ''
         systemd-run --pty \
-          --same-dir \
           --wait \
           --collect \
           --service-type=exec \
           --unit "manage-${name}.service" \
           --property "User=${name}" \
           --property "Group=${name}" \
+          --property "WorkingDirectory=/var/lib/${name}" \
           --property "Environment=DATABASE_URL=${database-url} USER_SETTINGS_FILE=${configFile}" \
       ''
       + optionalString (credentials != [ ]) (