[Build] feat: Improve landing page, navigation, and Settings page

## GitHub Update **Repository:** [MKWcorp/hrisnextgen](https://github.com/MKWcorp/hrisnextgen) **Author:** multimediadrw **Date:** 10/26/2025, 11:56:11 PM **Commit:** [`26dfc1d`](https://github.com/MKWcorp/hrisnextgen/commit/26dfc1ddcdc352282ee293189af03b726dc7ce44) ### Commit Message feat: Improve landing page, navigation, and Settings page - **Landing Page**: Complete redesign with persuasive marketing copy - New headline: 'Stop Bingung Target & OKR! Ubah Strategi Jadi Aksi Harian dengan AI' - Added Problem section highlighting pain points - Added Solution section with AI features - Added How It Works (3 steps) - Added Features section with detailed benefits - Updated CTA with 'Minta Akses Awal' and 'Pelajari Lebih Lanjut' - **Navigation**: Simplified to 3 core menus - Setup (⚙️) - for Business Units & Users setup - Goals (�) - manage strategic goals - Dashboard (�) - overview & analytics - Removed unused menus (Home, Review AI Strategy, Analytics) - **Settings Page**: Added helpful info text - Info about Business Unit requirement (min 1) - Info about Roles being optional - Info about User requirement (min 1) - **API Endpoints**: Added foreign key validation - Business Units DELETE: Check if used by users before delete - Roles DELETE: Check if used by users before delete - Better error messages with user count - **Goals Page**: Improved workflow - Added 'Create New Goal' button - AI Analysis button only shows when there's at least 1 goal - Better empty state message Technical: - Fixed Next.js 15 dynamic routes (await params) - Fixed method not allowed errors (405) - Removed unused FontAwesome imports - Clean code with proper error handling --- _This story was imported from historical commits._