OpenReader Native v1.3.1

Hide server preparation and keep reading

• Add Hide once the server accepts narration work. The native app remains
  usable while generation continues on the server.
• Android Back also hides an admitted server preparation.
• Keep a pending reminder in Offline library. Reopening preparation restores
  Server / save on phone and Resume.
• Resume cached server work and finish downloading the MP3 when you return.
• Do not let a hidden server dialog release the native reader's screen wake lock.

Hiding pauses local monitoring/downloads, not server generation. This does not
add an Android background download service or background phone synthesis.
Phone generation still needs its preparation screen kept open.

Install the signed ARM64 APK over the existing app; saved documents, voices,
audio and reading progress are preserved. No personal documents, account data,
credentials or signing keys are included.

The matching Android source ZIP and linux/amd64 Docker-load installer image are
provided with SHA-256 checksums. The full illustrated guide and server/container
configuration remain in the public repository.