fix(geliştirme): npm run dev açılışında yetim kalmış eski backend sürecini kapat

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -6,7 +6,7 @@
     "postinstall": "npm --prefix frontend install",
     "predev": "npm run db:up",
     "dev": "concurrently -k -n api,web -c blue,green \"npm:dev:api\" \"npm:dev:web\"",
-    "dev:api": "cd backend && cargo watch -q -c -w src -w Cargo.toml -x run",
+    "dev:api": "bash scripts/stop-stale-api.sh 8080 && cd backend && cargo watch -q -c -w src -w Cargo.toml -x run",
     "dev:web": "npm --prefix frontend run dev",
     "predev:host": "npm run db:up",
     "dev:host": "concurrently -k -n api,web -c blue,green \"npm:dev:api\" \"npm --prefix frontend run dev -- --host\"",