[demrom]

After cd ~/D + Tab, holding the onscreen Delete key stops before the completed line is empty. Completion updates the host editor, but UIKit still holds only the characters typed before Tab.

Reuse synchronizeRecalledInputContext(_:) from #1137 after Tab completion, right-arrow suggestion acceptance, and updateAutocomplete in the typed-character path. That last path can append a unique match's remaining text, a common prefix, or an option's argument separator. All three calls are in a-Shell/SceneDelegate+TerminalView.swift.

Tested in a development build of a-Shell 2.2.2 on a physical iPhone. Tab completed cd ~/D to cd ~/Documents/ (15 characters). Before the fix, UIKit held 6 characters; two 5-second Delete holds removed 6 characters total and left cd ~/Docu (9 characters). With the fix, UIKit held all 15 characters and one 5-second hold cleared both the terminal line and UIKit input.

Also tested typing c after Tab with Documents/ and Downloads/ as matches for cd ~/tmp/p/D. Completion produced cd ~/tmp/p/Documents/. Before the fix, UIKit held cd ~/tmp/p/Dc and an 8-second Delete hold left cd ~/tmp in the terminal. With the fix, the same hold cleared the line. Repeat-Tab and right-arrow acceptance, mid-line completion, z expansion, and marked-text input remain untested on the phone.

Refs #1137.