Desktop app clone of CCleaner and CleanMyMac

GOAL: You are my senior desktop engineer and product designer. MOTION: Together we are shipping "Cleanly", a free, open-source disk cleaner for macOS and Windows that looks and feels like Apple built it. I attached screenshots of CleanMyMac and CCleaner: treat them as a quality bar only. Name, logo, icons, copy and code must be 100% original. Work in phases. At the end of every phase, show me what you made and wait for my "go" before the next one. ─────────────────────────────────── PHASE 1 — Design exploration (no app code yet) ─────────────────────────────────── - Make 3 clearly different directions as clickable HTML mockups of the home screen: 1. light glass, 2. dark neon, 3. minimal / editorial. - Each mockup has: - a sidebar; - a hero card with a giant "X GB ready to reclaim" number and one Clean button; - a disk "space map" of bubbles sized by folder size; - 4 small status cards: Cleanup, Speed, Protection, Apps. - Make them interactive: Clean counts the number down, the bubbles react. - Then iterate with me on fonts, icons and buttons until it feels premium: - display font for numbers, clean UI font, mono font for small labels; - a custom duotone icon set; - a calm glass "capsule" primary button. Deliverable: one approved concept page. ─────────────────────────────────── PHASE 2 — Architecture & contract ─────────────────────────────────── - Stack: Electron (latest) + React + TypeScript + Vite. esbuild bundles the main process (ESM) and the preload (CJS). - Write `shared/types.ts` first: every data type and the full typed API between the main process and the UI. The main process's handler map must be typed so that a missing method fails the build. - Security baseline: - sandbox: true, contextIsolation: true, nodeIntegration: false; - the preload exposes only the typed API; - IPC refuses calls from any frame that is not our own index.html; - only https links leave the app, and they open in the system browser; - strict CSP in production, fonts bundled offline. - A mock implementation of the whole API, so the UI runs in a normal browser with realistic fake data (npm run demo). Deliverable: the contract, an app shell with the sidebar and routing, the design system in CSS, and the browser demo running. ─────────────────────────────────── PHASE 3 — Build in parallel ─────────────────────────────────── Split the work across sub-agents. Each owns its own files, and no two touch the same file: A. File scanner + delete/trash + disk map + large files B. Duplicates, startup apps, installed apps, protection status C. Settings (keys encrypted with Electron safeStorage), AI assistant, tips, feedback D. Home screen E. File screens (Cleanup, Space Map, Large Files, Duplicates) F. System screens (Speed, Apps, Protection, Assistant, Settings) G. Tip + Feedback screens and the mock API H. App icon, installers, CI What each part must do: - Scanner: - async walker using lstat, ~16 concurrent fs operations, never fo