Top jump: surface the page head, not just the first selectable row

Shift+F5 (and Home) used to park the first choice under its pinned
heading copies; now the scroll goes with it, so the headings and their
preamble come back for real — on the select lists and the node page.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

meshterm/ui/node_detail_screen.py

@@ -564,6 +564,9 @@ class NodeDetailScreen(Screen):
             if n:
                 self._row_index = 0
                 self._sync_route_sel(focus)
+            # On a terminal too short for the pinned layout the frame follows the cursor;
+            # jumping home should surface the very top of the page, header included.
+            self.scroll_to_top()
         elif action in ("end", "ctrl_end"):
             if n:
                 self._row_index = n - 1

meshterm/ui/tui/select.py

@@ -627,7 +627,11 @@ class SelectScreen(Screen):
         elif action == "pagedown":
             self._index = min(len(choices) - 1, self._index + self._page_step) if choices else 0
         elif action in ("home", "ctrl_home"):
+            # The jump goes to the very top of the *page*, not just the first choice: the
+            # rows above it (a heading, its preamble, a lead-in note) scroll back into
+            # view too, rather than staying folded behind their pinned stand-ins.
             self._index = 0
+            self.scroll_to_top()
         elif action in ("end", "ctrl_end"):
             self._index = max(0, len(choices) - 1)
         elif action == "ctrl_pagedown":