fix: ExtL10n String vs Text misuse and replace caption1 with caption

ExtL10n.text returns Text; use ExtL10n.string where String is
required (computed properties, Text/Button initializers). TypeStyle
has caption, not caption1 — align onboarding and dictionary views.

Co-authored-by: Rocky <hkgood@users.noreply.github.com>

OSGKeyboardExt/Views/AppContextChip.swift

@@ -57,11 +57,11 @@ struct AppContextChip: View {
     }
 
     private var chipText: String {
-        ExtL10n.text("keyboard.appContext.chip.\(state.appContext.rawValue)")
+        ExtL10n.string("keyboard.appContext.chip.\(state.appContext.rawValue)")
     }
 
     private func menuLabel(for context: AppContext) -> String {
-        ExtL10n.text("keyboard.appContext.menu.\(context.rawValue)")
+        ExtL10n.string("keyboard.appContext.menu.\(context.rawValue)")
     }
 
     private func iconName(for context: AppContext) -> String {