chore(version): bump to 1.4.0

Minor. Sync now carries the whole library, not only watch positions:
shares with their links and passwords, playback, appearance and metadata
settings, the TMDB key, hand-picked matches and per-title tracks, so every
signed-in device shows the same library. Devices share it once all of them
run 1.4.0; an older build keeps syncing watch positions and ignores the
rest.

Android drops picture-in-picture. iOS fixes the stretched player after a
rotation or resize, the share that failed to add on the first try, and
settings that saved late or silently. Both phone clients now show what is
running and why a form was refused.

No catalog schema change since 1.3.0.

Cargo.toml

@@ -11,7 +11,7 @@ members = [
 ]
 
 [workspace.package]
-version = "1.3.0"
+version = "1.4.0"
 edition = "2024"
 license = "MIT"
 repository = "https://github.com/narrrl/proton-stream"