Make the Rust client the sole app

app/touch/long-press.touch

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+# A long-press then a drag across the text: held past LONG_PRESS
+# (500ms) without moving, which is what starts a selection rather than a
+# pan, then dragged sideways so the selection actually covers
+# something. A press alone leaves a collapsed caret and no selected
+# text (`Selection::begin`), which is why this file does not stop at the
+# hold.
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+520 move 300 1000
+560 move 700 1000
+600 move 900 1000
+640 up 900 1000