Save Tool v1.7.1 - fix: stays reachable behind the tunnel

Fixed: "Save Tool is not reachable" (backend answered 502)

The app used to shut itself down about 3 minutes after the last browser tab stopped polling - fine for a desktop app, fatal when it sits behind the Cloudflare Worker and the tunnel keeps running (the Worker then got a 502 from the tunnel).

• In public mode the app now stays up until the launcher stops it (no idle exit)
• The launcher (run-public.bat) now supervises the app: if it ever exits, it is restarted automatically

Verified: with no traffic at all for 3.5 minutes, the app stayed up and the Worker kept answering 200.

How to run it

run-public.bat          (or the "Save Tool (public).bat" shortcut)

It starts the app, opens the cloudflared tunnel, points the Worker secret at it, and prints:

https://savetool.thanhhung33.workers.dev

Open that on your phone (4G, anywhere), paste links, tap Save to pull a file onto the phone.

Recommended download: SaveTool-v1.7.1-win64.zip - everything included, unzip and double-click savetoolw.exe.