fix: privacy manifests, history/settings headers, and dock contrast

Resolve TestFlight ITMS-91056 by correcting privacy manifest keys and reason arrays. Add left-aligned page headers with circular confirm buttons, keep the keyboard surface transparent, and improve unselected dock icon contrast in light and dark mode.

OSGKeyboardExt/Views/KeyboardRootView.swift

@@ -57,16 +57,13 @@ public struct KeyboardRootView: View {
         }
         .padding(.top, 4)
         .padding(.bottom, 6)
-        .background(keyboardBackground)
+        // 透明背景：让系统键盘 chrome 透出，不自行铺色（深浅模式一致）。
+        .background(Color.clear)
         .frame(height: Self.totalHeight)
         // Feed the resolved palette to all nested chips/buttons.
         .environment(\.themePalette, palette)
     }
 
-    private var keyboardBackground: Color {
-        colorScheme == .dark ? palette.background : Color.clear
-    }
-
     // MARK: - Top bar
 
     private var topBar: some View {