refactor: remove CoursePromoBadge component and related settings

- Deleted the CoursePromoBadge component from the sidebar and its associated logic.
- Removed references to the hideMarketingContent setting from the settings view and appearance section.
- Cleaned up related tests for marketing content visibility as they are no longer applicable.

apps/ui/src/store/app-store.ts

@@ -459,9 +459,6 @@ export interface AppState {
   // Audio Settings
   muteDoneSound: boolean; // When true, mute the notification sound when agents complete (default: false)
 
-  // Marketing Settings
-  hideMarketingContent: boolean; // When true, hide marketing content like the "Become a 10x Dev" badge (default: false)
-
   // Enhancement Model Settings
   enhancementModel: AgentModel; // Model used for feature enhancement (default: sonnet)
 
@@ -673,9 +670,6 @@ export interface AppActions {
   // Audio Settings actions
   setMuteDoneSound: (muted: boolean) => void;
 
-  // Marketing Settings actions
-  setHideMarketingContent: (hide: boolean) => void;
-
   // Enhancement Model actions
   setEnhancementModel: (model: AgentModel) => void;
 
@@ -830,7 +824,6 @@ const initialState: AppState = {
   showProfilesOnly: false, // Default to showing all options (not profiles only)
   keyboardShortcuts: DEFAULT_KEYBOARD_SHORTCUTS, // Default keyboard shortcuts
   muteDoneSound: false, // Default to sound enabled (not muted)
-  hideMarketingContent: false, // Default to showing marketing content
   enhancementModel: "sonnet", // Default to sonnet for feature enhancement
   aiProfiles: DEFAULT_AI_PROFILES,
   projectAnalysis: null,
@@ -1494,9 +1487,6 @@ export const useAppStore = create<AppState & AppActions>()(
       // Audio Settings actions
       setMuteDoneSound: (muted) => set({ muteDoneSound: muted }),
 
-      // Marketing Settings actions
-      setHideMarketingContent: (hide) => set({ hideMarketingContent: hide }),
-
       // Enhancement Model actions
       setEnhancementModel: (model) => set({ enhancementModel: model }),
 
@@ -2341,7 +2331,6 @@ export const useAppStore = create<AppState & AppActions>()(
         showProfilesOnly: state.showProfilesOnly,
         keyboardShortcuts: state.keyboardShortcuts,
         muteDoneSound: state.muteDoneSound,
-        hideMarketingContent: state.hideMarketingContent,
         enhancementModel: state.enhancementModel,
         // Profiles and sessions
         aiProfiles: state.aiProfiles,