feat(mobile): integrate remote terminal, SSH and reader workflows (#343)

Integrate the Android client with native desktop pairing, remote terminal and SSH/SFTP sessions, keyboard controls, file reading and Agent conversations. Preserve authenticated connection ownership and per-device input permissions.

Validation: all ten required GitHub checks passed, including five native test platforms and both macOS release workspace checks.

nebula_split/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nebula-split"
-version = "1.9.1"
+version = "2.0.0"
 license = "GPL-3.0-or-later"
 description = "Shared split-pane rules: layout tree, geometry, divider drag and directional focus"
 publish = false