feat: East Africa + Southern Africa pills with regional sub-sections

- East Africa pill: merges Uganda + east-africa tags; Uganda pinned first via sub-sections
- Southern Africa pill: covers SA, Namibia, Botswana, Zimbabwe, Zambia, Mozambique; SA/Namibia/Botswana prioritized
- StoryStore.setPill now resets lastSyncedAt to bypass 30s rate-limit on filter switch
- sectionSupplement background fetch populates sparse regional sections in All digest
- SignalFeedView digestContent: flat hero+scroll path for pills without subSections (was showing max 5)
- Theme: removed standalone Uganda pill, wired new sub-section layouts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Jarvis/Views/Settings/SettingsView.swift

@@ -8,6 +8,7 @@ struct SettingsView: View {
     @EnvironmentObject var settings: ServerSettings
     @Environment(\.dismiss) private var dismiss
     @Environment(\.modelContext) private var modelContext
+    @AppStorage("appearanceMode") private var appearanceMode: AppearanceMode = .dark
     @Query private var cachedStories: [CachedStory]
     @Query private var cachedArticles: [CachedArticle]
     @State private var showClearConfirm = false
@@ -15,11 +16,15 @@ struct SettingsView: View {
     var body: some View {
         NavigationStack {
             ZStack {
-                Color.black.ignoresSafeArea()
+                Palette.background.ignoresSafeArea()
                 ScrollView {
                     VStack(alignment: .leading, spacing: 26) {
                         header
 
+                        group("APPEARANCE") {
+                            appearancePicker
+                        }
+
                         group("GENERAL") {
                             NavigationLink { NotificationsView() } label: {
                                 row(icon: "bell.badge", title: "Notifications",
@@ -60,13 +65,47 @@ struct SettingsView: View {
         }
     }
 
+    private var appearancePicker: some View {
+        HStack(spacing: 14) {
+            Image(systemName: "circle.lefthalf.filled")
+                .font(.system(size: 18))
+                .foregroundStyle(Palette.secondaryText)
+                .frame(width: 26)
+            Text("Theme")
+                .font(.system(size: 16, weight: .heavy))
+                .foregroundStyle(Palette.primaryText)
+            Spacer()
+            HStack(spacing: 0) {
+                ForEach(AppearanceMode.allCases, id: \.self) { mode in
+                    Button {
+                        appearanceMode = mode
+                    } label: {
+                        Text(mode.label)
+                            .font(.system(size: 12, weight: .bold))
+                            .foregroundStyle(appearanceMode == mode ? .black : Palette.secondaryText)
+                            .padding(.horizontal, 12)
+                            .frame(height: 30)
+                            .background(appearanceMode == mode ? Palette.orange : Color.clear)
+                            .clipShape(Capsule())
+                    }
+                    .buttonStyle(.plain)
+                }
+            }
+            .background(Palette.surface2)
+            .clipShape(Capsule())
+            .overlay(Capsule().stroke(Palette.surface2, lineWidth: 0.5))
+        }
+        .padding(.horizontal, 14).padding(.vertical, 14)
+        .contentShape(Rectangle())
+    }
+
     private var header: some View {
         HStack {
-            Text("Settings").font(.system(size: 22, weight: .heavy)).foregroundStyle(.white)
+            Text("Settings").font(.system(size: 22, weight: .heavy)).foregroundStyle(Palette.primaryText)
             Spacer()
             Button { dismiss() } label: {
                 Image(systemName: "xmark").font(.system(size: 15, weight: .bold))
-                    .foregroundStyle(Color(hex: "888888")).frame(width: 44, height: 44)
+                    .foregroundStyle(Palette.secondaryText).frame(width: 44, height: 44)
             }
         }
         .padding(.top, 8)
@@ -75,7 +114,7 @@ struct SettingsView: View {
     private func group<C: View>(_ label: String, @ViewBuilder _ content: () -> C) -> some View {
         VStack(alignment: .leading, spacing: 10) {
             Text(label).font(.system(size: 11, weight: .bold, design: .monospaced))
-                .kerning(0.8).foregroundStyle(Color(hex: "555555"))
+                .kerning(0.8).foregroundStyle(Palette.tertiaryText)
             VStack(spacing: 0) { content() }
                 .background(Palette.surface)
                 .clipShape(RoundedRectangle(cornerRadius: 14))
@@ -83,18 +122,19 @@ struct SettingsView: View {
     }
 
     private func row(icon: String, title: String, subtitle: String,
-                     chevron: Bool = true, tint: Color = .white) -> some View {
-        HStack(spacing: 14) {
+                     chevron: Bool = true, tint: Color? = nil) -> some View {
+        let resolvedTint = tint ?? Palette.primaryText
+        return HStack(spacing: 14) {
             Image(systemName: icon).font(.system(size: 18))
-                .foregroundStyle(tint == .white ? Color(hex: "999999") : tint).frame(width: 26)
+                .foregroundStyle(tint == nil ? Palette.secondaryText : resolvedTint).frame(width: 26)
             VStack(alignment: .leading, spacing: 2) {
-                Text(title).font(.system(size: 16, weight: .heavy)).foregroundStyle(tint).lineLimit(1)
-                Text(subtitle).font(.system(size: 12)).foregroundStyle(Color(hex: "888888")).lineLimit(1)
+                Text(title).font(.system(size: 16, weight: .heavy)).foregroundStyle(resolvedTint).lineLimit(1)
+                Text(subtitle).font(.system(size: 12)).foregroundStyle(Palette.secondaryText).lineLimit(1)
             }
             Spacer()
             if chevron {
                 Image(systemName: "chevron.right").font(.system(size: 13, weight: .bold))
-                    .foregroundStyle(Color(hex: "555555"))
+                    .foregroundStyle(Palette.tertiaryText)
             }
         }
         .padding(.horizontal, 14).padding(.vertical, 14).frame(minHeight: 44)