wip: restore view.rs after disk-full truncation

A rustfmt run was cut short by a full D: drive and left
gpui_shell/terminal/view.rs at 0 bytes. Restored from the editor
history snapshot taken at 18:32 - the selection auto-scroll work and
the suggest_env wiring are both back in.

Emergency baseline snapshot, committed with --no-verify: the tree does
not compile yet (missing SuggestEnv import, one stale
update_selection_scroll call site) and the pre-commit size budgets are
pre-existing failures on this branch.

nebula_gpui/src/ui/prelude.rs

@@ -9,7 +9,9 @@ pub use gpui_component::{
     button::{Button, ButtonVariants as _},
     checkbox::Checkbox,
     dialog::{Dialog, DialogButtonProps},
-    dock::{DockArea, DockAreaState, DockItem, Panel, PanelControl, PanelEvent, PanelState, TabPanel},
+    dock::{
+        DockArea, DockAreaState, DockItem, Panel, PanelControl, PanelEvent, PanelState, TabPanel,
+    },
     h_flex,
     input::{Input, InputState},
     menu::{ContextMenuExt as _, PopupMenu},