fix(field): bound the Field dialog's automation indices; ASCII browse button

#1585's field_dialog action stored any index it was given, and the dialog
indexes its category, case, size, named-type, formula, precision and plot
scale lists with them, so an out-of-range value panicked while drawing.
They are checked against the list lengths now. The hyperlink browse
button drew a glyph (…) that is tofu without the font, and two of the
new local_header_dates calls were mis-indented.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui/window/field_dialog.rs

@@ -519,7 +519,7 @@ fn format_panel<'a>(state: &'a FieldDialogState) -> Element<'a, Message> {
                     .font(iced::Font::MONOSPACE)
                     .style(field_style)
                     .on_input(|v| msg(FieldDialogMsg::HyperlinkUrl(v))),
-                button(text("…").size(12))
+                button(text("...").size(12))
                     .on_press(msg(FieldDialogMsg::BrowseHyperlink))
                     .style(button_style(false))
                     .padding([5, 10]),