Fix hooks.

src/Terminal.zig

@@ -56,6 +56,11 @@ on_focus: *const fn (ctx: ?*anyopaque) void,
 /// it in the tab strip.
 on_status: *const fn (ctx: ?*anyopaque, status: Status) void,
 
+/// Called when the user types into this terminal. Focus isn't enough for
+/// this: the owner uses it as the sign that whatever the session had to say
+/// has been dealt with, and that is answering, not looking.
+on_input: *const fn (ctx: ?*anyopaque) void,
+
 ctx: ?*anyopaque = null,
 
 /// What a layout can specify for a terminal pane.
@@ -84,6 +89,7 @@ pub fn create(
         .on_exit = cbs.on_exit,
         .on_focus = cbs.on_focus,
         .on_status = cbs.on_status,
+        .on_input = cbs.on_input,
         .ctx = cbs.ctx,
     };
 
@@ -311,6 +317,7 @@ fn onKeyPressed(
     // Typing should always snap the view back to the prompt.
     self.session.term.screens.active.pages.scroll(.active);
     self.session.write(encoded);
+    self.on_input(self.ctx);
     self.area.as(gtk.Widget).queueDraw();
     return 1;
 }