refactor: remove AI profile functionality and related components

- Deleted the AI profile management feature, including all associated views, hooks, and types.
- Updated settings and navigation components to remove references to AI profiles.
- Adjusted local storage and settings synchronization logic to reflect the removal of AI profiles.
- Cleaned up tests and utility functions that were dependent on the AI profile feature.

These changes streamline the application by eliminating unused functionality, improving maintainability and reducing complexity.

apps/ui/src/lib/http-api-client.ts

@@ -1863,14 +1863,11 @@ export class HttpApiClient implements ElectronAPI {
         defaultSkipTests: boolean;
         enableDependencyBlocking: boolean;
         useWorktrees: boolean;
-        showProfilesOnly: boolean;
         defaultPlanningMode: string;
         defaultRequirePlanApproval: boolean;
-        defaultAIProfileId: string | null;
         muteDoneSound: boolean;
         enhancementModel: string;
         keyboardShortcuts: Record<string, string>;
-        aiProfiles: unknown[];
         projects: unknown[];
         trashedProjects: unknown[];
         projectHistory: string[];