T02 typography: text styles, keys, formatters, fit, links, math, motion text

Headings to overlines, Code, Kbd and KbdCombo on gpui keystrokes,
Highlight, MiddleEllipsis and EllipsisTooltip, links, eight formatted
values on jiff with a typographic minus, CopyableText, SelectableText,
Emoji, a TeX subset, rolling AnimatedNumber, Typewriter, tonal
GradientText, ShimmerText. Gallery probes now hug their targets.
Codex gpt-6-astra (max): PASS in round 2.

examples/gallery/pages/typography/mod.rs

@@ -0,0 +1,69 @@
+mod motion;
+mod text;
+mod values;
+
+use gpui::{AnyElement, App, IntoElement, ParentElement, Window, div};
+
+use super::Page;
+use crate::script::Step;
+
+pub const PAGE: Page = Page {
+    number: 2,
+    slug: "typography",
+    title: "Typography",
+    summary: "Inter for words, tabular figures for numbers, one ink for everything.",
+    render,
+    script: SCRIPT,
+};
+
+const SCRIPT: &[Step] = &[
+    Step::Rest,
+    Step::Hover("fit-tooltip"),
+    Step::Wait(700),
+    Step::Shot("ellipsis-tooltip"),
+    Step::Rest,
+    Step::ClickEnd("copy-token"),
+    Step::Shot("copied"),
+    Step::Click("select-text"),
+    Step::Key("cmd-a"),
+    Step::Shot("select-all"),
+    Step::Rest,
+];
+
+fn render(window: &mut Window, cx: &mut App) -> AnyElement {
+    div()
+        .child(text::headings(cx))
+        .child(text::title(cx))
+        .child(text::paragraph(cx))
+        .child(text::label(cx))
+        .child(text::caption(cx))
+        .child(text::overline(cx))
+        .child(text::inline_code(cx))
+        .child(text::kbd(cx))
+        .child(text::kbd_combo(cx))
+        .child(text::blockquote(cx))
+        .child(text::highlight(cx))
+        .child(text::truncate(cx))
+        .child(text::line_clamp(cx))
+        .child(text::middle(cx))
+        .child(text::ellipsis_tooltip(cx))
+        .child(text::link(cx))
+        .child(text::external_link(cx))
+        .child(values::relative_time(cx))
+        .child(values::date_time(cx))
+        .child(values::numbers(cx))
+        .child(values::currency(cx))
+        .child(values::percent(cx))
+        .child(values::file_size(cx))
+        .child(values::duration(cx))
+        .child(values::plural(cx))
+        .child(values::copyable(cx))
+        .child(values::selectable(cx))
+        .child(values::emoji(cx))
+        .child(values::latex(cx))
+        .child(motion::animated_number(window, cx))
+        .child(motion::typewriter(window, cx))
+        .child(motion::gradient(cx))
+        .child(motion::shimmer(cx))
+        .into_any_element()
+}