v5.19.18

• add support for showing contact message content (#585)
• fixes #579 - fix export hang during word wrapping of long quoted lines
• do not overwrite config files modified while nchat is running (#593)
• avoid logging warning on whatsapp group updates without sender
• add project scope doc and update contributing guidelines
• add unit tests for word wrapping and quote prefix handling
• improve make.sh physical ram calculation (#577)
• show download progress and add inactivity timeout for libsignal_ffi.a fetch
• report common go dependency match during build
• fix static linux release build by linking libresolv
• require golang v1.26 for static release builds
• fix signal update script version file path
• fix third-party license links in readme
• update tdlib to 1.8.67 from tdlib/td@bc9c263
• update whatsmeow to 20260919 from tulir/whatsmeow@0057a82
• update signalmeow to 20260918 from mautrix/signal@7667ed1