fix(scripts): desktop-fresh kill guard referenced the wrong dry-run flag (#1078)

The kill-before-wipe block used DRY_RUN; the script's flag is dryRun —
any run with a live instance crashed with ReferenceError before wiping.

Co-authored-by: mergetest <test@local>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

scripts/desktop-fresh.mjs

@@ -159,7 +159,7 @@ function sizeOf(p) {
   };
   const pids = findPids();
   if (pids.length > 0) {
-    if (DRY_RUN) {
+    if (dryRun) {
       console.log(`🔪 Would terminate running ${APP_NAME} processes: ${pids.join(", ")}\n`);
     } else {
       console.log(`🔪 Terminating running ${APP_NAME} processes (${pids.join(", ")})...`);