more accurate sync progress report

README.md

@@ -57,6 +57,8 @@ Two PLWL installs on the same LAN can mirror each other's content - no cloud, no
 
 Pick a device and choose what to push: **portable apps**, **apps imported from a prefix**, **Wine/Proton builds** and **prefixes**. The code has to be typed once - an accepted code is stored next to that device ID, so every later sync needs no typing. If the other side re-rolled its code, the stored one is forgotten and the launcher asks for the new one instead of failing silently.
 
+**Both machines show what is happening.** The sender gets a progress popup (phase, files, how many games / prefixes / Wine builds take part, and the transferred vs. planned size in GB); the receiving device gets the same popup titled *Receiving from X…*, driven by the transfer as it arrives. A running sync is not cancellable from the outside: clicking the backdrop or pressing Escape does nothing, the popup closes itself when the transfer ends - or after five minutes without progress, when the other side has vanished.
+
 The **sending device is the source of truth**: files that differ are overwritten, missing ones are written, and anything living only on the receiving side inside the synced trees (`files/apps/`, `files/wines/`, `files/wineprefixes/`, `files/data/icons/`) is deleted. Files are compared with a fast, collision-resistant hash (BLAKE2b-512, SHA-512/SHA-256 fallback); **Force sync all files** skips the comparison and overwrites everything instead. Everything else stays local: settings, logs, playtime/last played, translations, and external (leave) apps - prefixes are always kept usable, so app entries pointing inside a prefix keep their prefix-relative paths and the receiving side never loses its own `Main` prefix.
 
 ## Wine & Proton support