fix(app-iced): pressed 状态层改走 Interaction 表 + 外观 choice 叠卡底（M284）

四处手写按钮（语言 chip / 主题 chip / 日志行两个动作 / 外观互斥按钮）把
`matches!(status, Hovered | Pressed)` 合成分支换成 `Interaction::from_status(status)`
→ `interaction::layer_color`：pressed 从被压成 hover 的 8% 回到令牌表的 10%。

`appearance/section/mod.rs` 的 `choice` 合成底从写死的 `Role::Surface` 换成
`frame::BASE.role()`（= `MaterialLayer::Card` = `SurfaceContainerLow`），与同屏
`general.rs` / `general/theme.rs` 同源——M234/M237 修过两轮的那个错，这是漏网的第三处。

四处样式闭包抽成自由函数（`choice_style` / `chip_style` / `action_style`），单测直接喂
`Hovered` 与 `Pressed`：断言两色不等 + 各自逐值等于 `state_over` 的令牌求值（改 α 也会红）。
语言行那枚 chip 的断言住在 `general/theme.rs`（`general.rs` 已 390 行，贴 400 硬线）。

未验：hover/pressed 的图像判据。`--force-state` 到不了设置页/外观区（那里不消费
`Model.forced`，`pages/harness.rs` 自己写着），接线另立任务；本轮只出 rest 图并比 md5。

crates/app-iced/src/pages/settings/general.rs

@@ -38,16 +38,20 @@
 //!
 //! 分组元数据只有一份（这里的 [`GROUP`]）：`settings/mod.rs` 的 `GROUPS` 直接引用它。
 
+use iced::border::Radius;
 use iced::widget::{button, column, container, row};
-use iced::{Alignment, Background, Border, Element, Length, Padding, Shadow, Theme as IcedTheme};
+use iced::{
+    Alignment, Background, Border, Color, Element, Length, Padding, Shadow, Theme as IcedTheme,
+};
 
-use unlucky_design::color::{Role, StateLayer};
+use unlucky_design::color::Role;
 use unlucky_design::icons::IconKind;
 use unlucky_design::spacing::Space;
 use unlucky_design::typography::TypeRole;
 use unlucky_i18n::catalog::Key;
 use unlucky_i18n::LangChoice;
 
+use crate::app::components::interaction::{self, Interaction};
 use crate::fonts::install::{CjkInstall, FetchClass};
 use crate::pages::{frame, Language, Message};
 use crate::theme::Ui;
@@ -315,6 +319,8 @@ fn chip<'a>(ui: &'a Ui, text: &'a str, selected: bool, choice: LangChoice) -> El
         ui.color(Role::OnSurfaceVariant)
     };
     let border_color = ui.color(Role::OutlineVariant);
+    let stroke = crate::theme::STROKE_PX;
+    let radius = ui.radius(box_.shape, height);
 
     button(
         container(frame::text_role(
@@ -331,18 +337,42 @@ fn chip<'a>(ui: &'a Ui, text: &'a str, selected: bool, choice: LangChoice) -> El
         0.0,
         unlucky_design::inkcat::metrics::CHIP_PAD_X,
     ]))
-    .style(move |_theme: &IcedTheme, status| {
+    .style(chip_style(
+        ui,
+        selected,
+        content_color,
+        border_color,
+        stroke,
+        radius,
+    ))
+    .on_press(Message::Language(choice))
+    .into()
+}
+
+/// [`chip`] 的样式闭包（抽成自由函数：单测要**直接**喂 `Hovered` / `Pressed` 两态）。
+///
+/// - **α 只从 [`Interaction`] 来**：hover 8% / pressed 10%（M3）。M284 之前两种态合并成一条
+///   `matches!(status, Hovered | Pressed)` 分支、都叠 `StateLayer::Hover`，按下于是被压成 8%；
+/// - **合成底是 [`frame::BASE`]**（M237：这一组住在 `frame::card` 里，状态层叠卡底而不是画布）。
+fn chip_style<'a>(
+    ui: &'a Ui,
+    selected: bool,
+    content_color: Color,
+    border_color: Color,
+    stroke: f32,
+    radius: Radius,
+) -> impl Fn(&IcedTheme, button::Status) -> button::Style + 'a {
+    move |_theme, status| {
         let background = if selected {
             Some(Background::Color(ui.color(Role::SecondaryContainer)))
-        } else if matches!(status, button::Status::Hovered | button::Status::Pressed) {
-            // M237：这一组整个住在 `frame::card` 里，状态层叠**卡底**（不是画布）。
-            Some(Background::Color(ui.state_over(
-                StateLayer::Hover,
+        } else {
+            interaction::layer_color(
+                ui,
+                Interaction::from_status(status),
                 Role::OnSurface,
                 frame::BASE.role(),
-            )))
-        } else {
-            None
+            )
+            .map(Background::Color)
         };
 
         button::Style {
@@ -350,17 +380,11 @@ fn chip<'a>(ui: &'a Ui, text: &'a str, selected: bool, choice: LangChoice) -> El
             text_color: content_color,
             border: Border {
                 color: border_color,
-                width: if selected {
-                    0.0
-                } else {
-                    crate::theme::STROKE_PX
-                },
-                radius: ui.radius(box_.shape, height),
+                width: if selected { 0.0 } else { stroke },
+                radius,
             },
             shadow: Shadow::default(),
             snap: true,
         }
-    })
-    .on_press(Message::Language(choice))
-    .into()
+    }
 }

crates/app-iced/src/pages/settings/general/theme.rs

@@ -9,16 +9,20 @@
 //! 的 `dark` / `light`；第三档「跟随系统」= `auto`，由系统深浅落到对应色板
 //! （`BrandBoard::for_flavor`）。所以这里**不新增配置键**，旧配置读进来语义也一致。
 
+use iced::border::Radius;
 use iced::widget::{button, column, container, row};
-use iced::{Alignment, Background, Border, Element, Length, Padding, Shadow, Theme as IcedTheme};
+use iced::{
+    Alignment, Background, Border, Color, Element, Length, Padding, Shadow, Theme as IcedTheme,
+};
 
-use unlucky_design::color::{Role, StateLayer};
+use unlucky_design::color::Role;
 use unlucky_design::inkcat::metrics as chipbox;
 use unlucky_design::spacing::Space;
 use unlucky_design::typography::TypeRole;
 use unlucky_i18n::catalog::{Catalog, Key};
 use unlucky_presenter::prefs::ThemeMode;
 
+use crate::app::components::interaction::{self, Interaction};
 use crate::pages::{frame, Message};
 use crate::theme::Ui;
 
@@ -103,6 +107,7 @@ fn chip<'a>(ui: &'a Ui, text: &'a str, selected: bool, mode: ThemeMode) -> Eleme
     };
     let border_color = ui.color(Role::OutlineVariant);
     let stroke = crate::theme::STROKE_PX;
+    let radius = ui.radius(box_.shape, height);
 
     button(
         container(frame::text_role(
@@ -116,18 +121,42 @@ fn chip<'a>(ui: &'a Ui, text: &'a str, selected: bool, mode: ThemeMode) -> Eleme
     )
     .height(height)
     .padding(Padding::from([0.0, chipbox::CHIP_PAD_X]))
-    .style(move |_theme: &IcedTheme, status| {
+    .style(chip_style(
+        ui,
+        selected,
+        content_color,
+        border_color,
+        stroke,
+        radius,
+    ))
+    .on_press(Message::Theme(mode))
+    .into()
+}
+
+/// [`chip`] 的样式闭包（抽成自由函数：单测要**直接**喂 `Hovered` / `Pressed` 两态）。
+///
+/// - **α 只从 [`Interaction`] 来**：hover 8% / pressed 10%（M3）。M284 之前两种态合并成一条
+///   `matches!(status, Hovered | Pressed)` 分支、都叠 `StateLayer::Hover`，按下于是被压成 8%；
+/// - **合成底是 [`frame::BASE`]**（M237：主题三档住在设置卡里，状态层叠卡底而不是画布）。
+fn chip_style<'a>(
+    ui: &'a Ui,
+    selected: bool,
+    content_color: Color,
+    border_color: Color,
+    stroke: f32,
+    radius: Radius,
+) -> impl Fn(&IcedTheme, button::Status) -> button::Style + 'a {
+    move |_theme, status| {
         let background = if selected {
             Some(Background::Color(ui.color(Role::SecondaryContainer)))
-        } else if matches!(status, button::Status::Hovered | button::Status::Pressed) {
-            // M237：主题三档同样住在设置卡里，状态层叠卡底（`frame::BASE`）。
-            Some(Background::Color(ui.state_over(
-                StateLayer::Hover,
+        } else {
+            interaction::layer_color(
+                ui,
+                Interaction::from_status(status),
                 Role::OnSurface,
                 frame::BASE.role(),
-            )))
-        } else {
-            None
+            )
+            .map(Background::Color)
         };
 
         button::Style {
@@ -136,19 +165,41 @@ fn chip<'a>(ui: &'a Ui, text: &'a str, selected: bool, mode: ThemeMode) -> Eleme
             border: Border {
                 color: border_color,
                 width: if selected { 0.0 } else { stroke },
-                radius: ui.radius(box_.shape, height),
+                radius,
             },
             shadow: Shadow::default(),
             snap: true,
         }
-    })
-    .on_press(Message::Theme(mode))
-    .into()
+    }
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
+    use unlucky_design::color::{SchemeFlavor, StateLayer};
+    use unlucky_design::typography::Platform;
+
+    use crate::theme::Families;
+
+    fn ui() -> Ui {
+        Ui::with_platform(
+            SchemeFlavor::Light,
+            Platform::Windows,
+            Families {
+                text: "Segoe UI",
+                display: "Segoe UI",
+                mono: "Consolas",
+            },
+        )
+    }
+
+    fn solid(style: button::Style) -> Color {
+        match style.background {
+            Some(Background::Color(color)) => color,
+            None => panic!("未选中态的 hover/pressed 必须叠状态层"),
+            Some(other) => panic!("背景必须是实色，得到 {other:?}"),
+        }
+    }
 
     /// 三档 = 两块板 + 一种跟随，顺序是深 → 浅 → 跟随（换序会让「Ink 在最左」这条观感失守）。
     #[test]
@@ -161,4 +212,71 @@ mod tests {
         assert_eq!(mode_label(ThemeMode::Light), Key::SettingsThemeSilver);
         assert_eq!(mode_label(ThemeMode::Auto), Key::SettingsThemeFollowSystem);
     }
+
+    /// hover(8%) 与 pressed(10%) 是**两档**，且各自逐值等于令牌表（把 10% 改成 11% 也会红）。
+    ///
+    /// 抓得住：①回到 `matches!(status, Hovered | Pressed)` 合并分支（两色相等 ⇒ 第一条红）；
+    /// ②pressed 用 hover 的 α、或合成底被换回画布（第二、三条红）。
+    /// 抓不住：观感；**过渡中间帧**（forced 路径不套 `tracked`，`layer_color` 直落端点值）。
+    ///
+    /// 底的角色取 `MaterialLayer::Card.surface_role()`（`frame::BASE` 就是它）：既盯住「叠的是卡底」
+    /// 这条语义，也不往 `settings/*.rs` 的接线点计数里多塞一次字面量（`pages/tests/base_wiring.rs`）。
+    fn assert_two_layers(ui: &Ui, style: impl Fn(&IcedTheme, button::Status) -> button::Style) {
+        let theme = ui.theme();
+        let hover = solid(style(&theme, button::Status::Hovered));
+        let pressed = solid(style(&theme, button::Status::Pressed));
+
+        assert_ne!(hover, pressed, "hover 与 pressed 必须是两档（8% / 10%）");
+        let base = unlucky_design::elevation::MaterialLayer::Card.surface_role();
+        assert_eq!(
+            hover,
+            ui.state_over(StateLayer::Hover, Role::OnSurface, base)
+        );
+        assert_eq!(
+            pressed,
+            ui.state_over(StateLayer::Pressed, Role::OnSurface, base)
+        );
+        assert!(
+            style(&theme, button::Status::Active).background.is_none(),
+            "静息态不叠状态层"
+        );
+    }
+
+    #[test]
+    fn the_theme_chip_draws_pressed_darker_than_hover() {
+        let ui = ui();
+        assert_two_layers(
+            &ui,
+            chip_style(
+                &ui,
+                false,
+                ui.color(Role::OnSurfaceVariant),
+                ui.color(Role::OutlineVariant),
+                crate::theme::STROKE_PX,
+                ui.radius(chipbox::CHIP.shape, chipbox::CHIP.height),
+            ),
+        );
+    }
+
+    /// **语言行那枚 chip**（`general::chip` 的 `chip_style`）同理：hover 8% / pressed 10%。
+    ///
+    /// 为什么这条断言住在 `theme.rs` 而不是 `general.rs`：后者已经 389 行（硬线 400），而
+    /// `general` 的私有项对子模块可见（Rust 的可见性包含后代模块），搬过来不用加 `pub`。
+    #[test]
+    fn the_language_chip_draws_pressed_darker_than_hover() {
+        use super::super::chip_style as language_chip_style;
+
+        let ui = ui();
+        assert_two_layers(
+            &ui,
+            language_chip_style(
+                &ui,
+                false,
+                ui.color(Role::OnSurfaceVariant),
+                ui.color(Role::OutlineVariant),
+                crate::theme::STROKE_PX,
+                ui.radius(chipbox::CHIP.shape, chipbox::CHIP.height),
+            ),
+        );
+    }
 }

crates/app-iced/src/pages/settings/logs_row.rs

@@ -12,15 +12,19 @@
 //! 为什么单独一个文件：`pages/settings/general.rs` 贴着 400 行硬线（语言行 + 字体行 + 三行只读），
 //! 这一行自带按钮与样式，塞回去必破线。
 
+use iced::border::Radius;
 use iced::widget::{button, column, container, row as row_widget};
-use iced::{Alignment, Background, Border, Element, Length, Padding, Shadow, Theme as IcedTheme};
+use iced::{
+    Alignment, Background, Border, Color, Element, Length, Padding, Shadow, Theme as IcedTheme,
+};
 
-use unlucky_design::color::{Role, StateLayer};
+use unlucky_design::color::Role;
 use unlucky_design::shape::ShapeScale;
 use unlucky_design::spacing::Space;
 use unlucky_design::typography::TypeRole;
 use unlucky_i18n::catalog::{Catalog, Key};
 
+use crate::app::components::interaction::{self, Interaction};
 use crate::pages::{frame, Action, Message};
 use crate::theme::Ui;
 
@@ -97,33 +101,112 @@ fn action_button<'a>(ui: &'a Ui, label: &'a str, message: Message) -> Element<'a
     let height = ui.metrics().control_height;
     let content = ui.color(Role::OnSurface);
     let outline = ui.color(Role::OutlineVariant);
+    let radius = ui.radius(ShapeScale::Full, height);
     button(
         container(frame_text(ui, TypeRole::LabelLarge, label, content)).align_y(Alignment::Center),
     )
     .height(height)
     .padding(Padding::from([0.0, ui.space(Space::X3)]))
-    .style(move |_theme: &IcedTheme, status| {
-        let background =
-            matches!(status, button::Status::Hovered | button::Status::Pressed).then(|| {
-                // M237：这一行住在设置卡里（`frame::card`），hover 状态层叠卡底。
-                Background::Color(ui.state_over(
-                    StateLayer::Hover,
-                    Role::OnSurface,
-                    frame::BASE.role(),
-                ))
-            });
+    .style(action_style(ui, content, outline, radius))
+    .on_press(message)
+    .into()
+}
+
+/// [`action_button`] 的样式闭包（抽成自由函数：单测要**直接**喂 `Hovered` / `Pressed` 两态）。
+///
+/// - **α 只从 [`Interaction`] 来**：hover 8% / pressed 10%（M3）。M284 之前两种态合并成一条
+///   `matches!(status, Hovered | Pressed)` 分支、都叠 `StateLayer::Hover`，按下于是被压成 8%；
+/// - **合成底是 [`frame::BASE`]**（M237：这一行住在设置卡里，状态层叠卡底而不是画布）。
+fn action_style<'a>(
+    ui: &'a Ui,
+    content: Color,
+    outline: Color,
+    radius: Radius,
+) -> impl Fn(&IcedTheme, button::Status) -> button::Style + 'a {
+    move |_theme, status| {
+        let background = interaction::layer_color(
+            ui,
+            Interaction::from_status(status),
+            Role::OnSurface,
+            frame::BASE.role(),
+        )
+        .map(Background::Color);
+
         button::Style {
             background,
             text_color: content,
             border: Border {
                 color: outline,
                 width: 1.0,
-                radius: ui.radius(ShapeScale::Full, height),
+                radius,
             },
             shadow: Shadow::default(),
             snap: true,
         }
-    })
-    .on_press(message)
-    .into()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use unlucky_design::color::{SchemeFlavor, StateLayer};
+    use unlucky_design::typography::Platform;
+
+    use crate::theme::Families;
+
+    fn ui() -> Ui {
+        Ui::with_platform(
+            SchemeFlavor::Light,
+            Platform::Windows,
+            Families {
+                text: "Segoe UI",
+                display: "Segoe UI",
+                mono: "Consolas",
+            },
+        )
+    }
+
+    fn solid(style: button::Style) -> Color {
+        match style.background {
+            Some(Background::Color(color)) => color,
+            None => panic!("hover/pressed 必须叠状态层"),
+            Some(other) => panic!("背景必须是实色，得到 {other:?}"),
+        }
+    }
+
+    /// hover(8%) 与 pressed(10%) 是**两档**，且各自逐值等于令牌表（把 10% 改成 11% 也会红）。
+    ///
+    /// 抓得住：①回到 `matches!(status, Hovered | Pressed)` 合并分支（两色相等 ⇒ 第一条红）；
+    /// ②pressed 用 hover 的 α、或合成底被换回画布（第二、三条红）。
+    /// 抓不住：观感；**过渡中间帧**（forced 路径不套 `tracked`，`layer_color` 直落端点值）。
+    ///
+    /// 底取 `MaterialLayer::Card.surface_role()`（`frame::BASE` 就是它），不重复写字面量。
+    #[test]
+    fn the_logs_action_button_draws_pressed_darker_than_hover() {
+        let ui = ui();
+        let style = action_style(
+            &ui,
+            ui.color(Role::OnSurface),
+            ui.color(Role::OutlineVariant),
+            ui.radius(ShapeScale::Full, ui.metrics().control_height),
+        );
+        let theme = ui.theme();
+        let hover = solid(style(&theme, button::Status::Hovered));
+        let pressed = solid(style(&theme, button::Status::Pressed));
+
+        assert_ne!(hover, pressed, "hover 与 pressed 必须是两档（8% / 10%）");
+        let base = unlucky_design::elevation::MaterialLayer::Card.surface_role();
+        assert_eq!(
+            hover,
+            ui.state_over(StateLayer::Hover, Role::OnSurface, base)
+        );
+        assert_eq!(
+            pressed,
+            ui.state_over(StateLayer::Pressed, Role::OnSurface, base)
+        );
+        assert!(
+            style(&theme, button::Status::Active).background.is_none(),
+            "静息态不叠状态层"
+        );
+    }
 }