Add resolved appearance engine and paired theme settings

Resolve light, dark and automatic appearance centrally and publish live theme snapshots to native surfaces and the appearance portal. Add paired preset families, custom theme imports, accessibility transforms and contrast-safe transitions.

Refine the Settings gallery and Auto controls, move overrides under advanced customization, and share palette-aware switches and circular slider thumbs. Document configuration and include theme licenses and integration coverage.

shell/ferese-settings/src/schema.rs

@@ -1,6 +1,7 @@
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum Page {
     Appearance,
+    Accessibility,
     Wallpaper,
     Desktop,
     Bar,
@@ -15,8 +16,9 @@ pub enum Page {
 }
 
 impl Page {
-    pub const ALL: [Self; 12] = [
+    pub const ALL: [Self; 13] = [
         Self::Appearance,
+        Self::Accessibility,
         Self::Wallpaper,
         Self::Desktop,
         Self::Bar,
@@ -33,6 +35,7 @@ impl Page {
     pub fn title(self) -> &'static str {
         match self {
             Self::Appearance => "Appearance",
+            Self::Accessibility => "Accessibility",
             Self::Wallpaper => "Wallpaper",
             Self::Desktop => "Desktop widgets",
             Self::Bar => "Menu bar",
@@ -50,6 +53,7 @@ impl Page {
     pub fn subtitle(self) -> &'static str {
         match self {
             Self::Appearance => "A desktop that feels like yours.",
+            Self::Accessibility => "Make the desktop easier to see and use.",
             Self::Wallpaper => "Set the scene for your workspace.",
             Self::Desktop => "A clock that feels at home on your wallpaper.",
             Self::Bar => "Everything you need, within reach.",
@@ -66,6 +70,7 @@ impl Page {
 
     pub fn icon(self) -> &'static str {
         match self {
+            Self::Accessibility => "M12 3a2 2 0 1 0 0 4a2 2 0 1 0 0-4 M4 9h16 M12 9v6 M12 15l-5 6 M12 15l5 6",
             Self::Appearance => {
                 "M12 3a9 9 0 1 0 0 18h1a2 2 0 0 0 0-4h-1a1 1 0 0 1 0-2h3a6 6 0 0 0 0-12z M7 9h.01 M10 6h.01 M15 6h.01 M18 10h.01"
             }
@@ -178,7 +183,7 @@ pub fn text(
     Field::new(path, label, description, Kind::Text { default, argv: false })
 }
 
-fn choice(
+pub fn choice(
     path: &str,
     label: &str,
     description: &str,
@@ -591,7 +596,70 @@ pub fn fields(page: Page) -> Vec<Field> {
                 false,
             ),
         ],
+        Page::Accessibility => vec![
+            toggle(
+                "theme.accessibility.increase_contrast",
+                "Increase contrast",
+                "Stronger text and borders.",
+                false,
+            ),
+            toggle(
+                "theme.accessibility.reduce_transparency",
+                "Reduce transparency",
+                "Solid surfaces; background blur is disabled.",
+                false,
+            ),
+            toggle(
+                "animations.reduced_motion",
+                "Reduce motion",
+                "Use immediate changes in place of animations.",
+                false,
+            ),
+        ],
         Page::Appearance => vec![
+            choice(
+                "theme.mode",
+                "Appearance",
+                "Choose a fixed appearance or let Auto follow a source.",
+                "dark",
+                &[("light", "Light"), ("dark", "Dark"), ("auto", "Auto")],
+            ),
+            text(
+                "theme.file",
+                "Shared theme file",
+                "Optional KDL overrides. Relative paths start in your config folder.",
+                "",
+            ),
+            text(
+                "theme.light.file",
+                "Light theme file",
+                "Optional overrides for Light appearance.",
+                "",
+            ),
+            text(
+                "theme.dark.file",
+                "Dark theme file",
+                "Optional overrides for Dark appearance.",
+                "",
+            ),
+            text(
+                "theme.schedule.light_at",
+                "Light at",
+                "Local time in HH:MM format.",
+                "07:00",
+            ),
+            text(
+                "theme.schedule.dark_at",
+                "Dark at",
+                "Local time in HH:MM format.",
+                "19:00",
+            ),
+            text(
+                "theme.schedule.timezone",
+                "Timezone",
+                "system follows your desktop timezone; or enter an IANA timezone.",
+                "system",
+            ),
             range(
                 "theme.geometry.shell_radius",
                 "Shell corner radius",
@@ -604,17 +672,11 @@ pub fn fields(page: Page) -> Vec<Field> {
                 false,
             ),
             text(
-                "theme.colors.accent",
+                "theme.accent",
                 "Accent color",
                 "Focus rings and selected controls. Use a hex color.",
                 "#3D7BE6",
             ),
-            text(
-                "theme.colors.surface_base",
-                "Surface color",
-                "The base color for desktop surfaces.",
-                "#111821",
-            ),
             choice(
                 "theme.material.style",
                 "Surface style",
@@ -860,12 +922,6 @@ pub fn fields(page: Page) -> Vec<Field> {
                 "×",
                 false,
             ),
-            toggle(
-                "animations.reduced_motion",
-                "Reduce motion",
-                "Use immediate changes in place of animations.",
-                false,
-            ),
             range(
                 "appearance.inactive_dim.duration_ms",
                 "Focus transition",