Leave the shell restart to the update flow

Restarting immediately after the plugin rescan races Quickshell IPC handler creation and can crash the exiting shell. The normal update flow already restarts after migrations. Let this migration finish through live enablement and placement without adding timing workarounds.

test/shell.d/elsewhen-default-migration-test.sh

@@ -23,7 +23,8 @@ printf '%s\n' "${TEST_PUT_RESULT:-ok}"
 SH
 cat >"$test_dir/bin/omarchy-restart-shell" <<'SH'
 #!/bin/bash
-printf 'restart\n' >>"$CALL_LOG"
+echo 'migration must leave the restart to omarchy update' >&2
+exit 1
 SH
 chmod +x "$test_dir/bin/"*
 
@@ -46,9 +47,9 @@ run_migration
 [[ $(readlink "$ROOT/config/omarchy/plugins/omacom.elsewhen") == "$(readlink "$plugin")" ]] || fail "fresh installs use the same package link"
 pass "migration and fresh installs link to the package"
 
-expected=$'package elsewhen\nshell rescanPlugins\nshell putBarWidget omacom.elsewhen {"before":"omarchy.clock"}\nrestart'
-[[ $(cat "$CALL_LOG") == "$expected" ]] || fail "install, scan, placement and restart run in order" "$(cat "$CALL_LOG")"
-pass "real bar helper enables and places before the clock, then restarts"
+expected=$'package elsewhen\nshell rescanPlugins\nshell putBarWidget omacom.elsewhen {"before":"omarchy.clock"}'
+[[ $(cat "$CALL_LOG") == "$expected" ]] || fail "install, scan and placement run in order" "$(cat "$CALL_LOG")"
+pass "real bar helper enables and places before the clock without restarting during reload"
 
 run_migration
 [[ $(cat "$CALL_LOG") == "$expected" ]] || fail "migration can be rerun"