release: v0.2.4 里程碑快照（孤儿提交，无父；树 = dev 68362e5）

本批内容见 CHANGELOG.md 的 0.2.4 段。按 D41 用孤儿快照推 main，保留「公开史只有里程碑」的模型。

crates/design/tests/ink_cat_geometry.rs

@@ -0,0 +1,100 @@
+//! Ink Cat 规格卡的**几何与字级**门禁（M228）：按钮 XS~XL、FAB 四态、控件方框、字号校核。
+//!
+//! 与 `ink_cat_boards.rs` 分开是单文件 ≤400 行的硬约束；两侧都只用公开 API。
+
+use unlucky_design::inkcat::metrics;
+use unlucky_design::inkcat::size::{ControlSize, FabSize};
+use unlucky_design::inkcat::type_scale::{SpecFit, SpecText, UI_TEXT_FLOOR_PX};
+use unlucky_design::shape::ShapeScale;
+use unlucky_design::typography::{TypeRole, Weight};
+
+#[test]
+fn buttons_and_fabs_hit_the_spec_geometry() {
+    // 按钮五档：32/40/56/96/136，圆角一律半高（药丸）。
+    let heights: Vec<f32> = ControlSize::ALL.iter().map(|s| s.height_px()).collect();
+    assert_eq!(heights, vec![32.0, 40.0, 56.0, 96.0, 136.0]);
+    for size in ControlSize::ALL {
+        assert_eq!(
+            size.radius_px(),
+            size.height_px() / 2.0,
+            "{size:?} 该是药丸"
+        );
+    }
+    // M 档就是规格卡 `BUTTONS / 5 LEVELS` 那一行的 56 高。
+    assert_eq!(ControlSize::M.height_px(), 56.0);
+    assert_eq!(ControlSize::M.label_px(), 16.0);
+
+    // FAB 四态圆角 12/16/20/16（都不是半高，所以不用 Full）。
+    let radii: Vec<f32> = FabSize::ALL.iter().map(|s| s.radius_px()).collect();
+    assert_eq!(radii, vec![12.0, 16.0, 20.0, 16.0]);
+    let sizes: Vec<f32> = FabSize::ALL.iter().map(|s| s.height_px()).collect();
+    assert_eq!(sizes, vec![40.0, 56.0, 80.0, 56.0]);
+}
+
+#[test]
+fn component_boxes_hit_the_spec_corners() {
+    assert_eq!(metrics::CARD.radius_px(), 16.0, "ELEVATED CARD rx=16");
+    assert_eq!(metrics::DIALOG.radius_px(), 28.0, "对话框 rx=28");
+    assert_eq!(metrics::SNACKBAR.radius_px(), 16.0, "snackbar rx=16");
+    assert_eq!(metrics::SNACKBAR.height, 52.0);
+    assert_eq!(metrics::LIST_ROW.radius_px(), 30.0, "列表行药丸");
+    assert_eq!(metrics::LIST_ROW.height, 60.0);
+    assert_eq!(metrics::CHIP.height, 32.0);
+    assert_eq!(metrics::CHIP.radius_px(), 8.0);
+    // 输入框：默认圆角 4、药丸变体 28，内距 16 / 32（规格卡专门提醒过）。
+    assert_eq!(metrics::FIELD_SHAPE, ShapeScale::ExtraSmall);
+    assert_eq!(metrics::FIELD_SHAPE_ROUNDED, ShapeScale::ExtraLarge);
+    assert_eq!(metrics::FIELD_HEIGHT, 56.0);
+    assert_eq!(metrics::FIELD_INSET, 16.0);
+    assert_eq!(metrics::FIELD_PILL_INSET, 32.0);
+    // 开关 / 勾选 / 进度。
+    assert_eq!(
+        (metrics::SWITCH_TRACK.width, metrics::SWITCH_TRACK.height),
+        (52.0, 32.0)
+    );
+    assert_eq!(metrics::SWITCH_THUMB, 24.0);
+    assert_eq!(metrics::CHECKBOX.radius_px(), 4.0);
+    assert_eq!(metrics::PROGRESS_THICKNESS, 4.0);
+}
+
+#[test]
+fn spec_font_sizes_map_onto_the_official_scale() {
+    // 命中官方档的六档。
+    for (text, role) in [
+        (SpecText::ControlLabelSmall, TypeRole::TitleSmall),
+        (SpecText::DialogTitle, TypeRole::HeadlineSmall),
+        (SpecText::DisplayLabel, TypeRole::HeadlineLarge),
+        (SpecText::Caption, TypeRole::BodySmall),
+        (SpecText::Badge, TypeRole::LabelSmall),
+    ] {
+        assert_eq!(text.fit(), SpecFit::Exact(role), "{text:?}");
+    }
+    // 落在两档之间的三档：取较大那档，登记 1px 级偏离。
+    for (text, lower, upper) in [
+        (SpecText::Body, TypeRole::BodySmall, TypeRole::TitleSmall),
+        (
+            SpecText::Subtitle,
+            TypeRole::TitleSmall,
+            TypeRole::TitleMedium,
+        ),
+        (
+            SpecText::PageTitle,
+            TypeRole::DisplaySmall,
+            TypeRole::DisplayMedium,
+        ),
+    ] {
+        assert_eq!(text.fit(), SpecFit::Between(lower, upper), "{text:?}");
+        assert_eq!(text.fit().recommended(), Some(upper));
+    }
+    // 低于 UI 下限的两档：只能是设计稿标注。
+    for text in [SpecText::SectionCaps, SpecText::SwatchCaption] {
+        assert!(!text.in_ui(), "{text:?} 不该进 UI");
+        assert_eq!(text.fit(), SpecFit::BelowFloor);
+        assert_eq!(text.fit().recommended(), None);
+    }
+    assert_eq!(UI_TEXT_FLOOR_PX, 11.0);
+    // 按钮标签字重：规格卡是 500（官方 body/headline 是 400，这是按钮语义）。
+    for size in ControlSize::ALL {
+        assert_eq!(size.label().weight, Weight::Medium);
+    }
+}