Update WindowsUpdatePauser.cpp

# 📝 Changelog — Windows Update Pauser

> **v1.4.0 → v1.4.1**

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## ✅ New Features

- **Added restart requirement** after pausing or resuming updates.  
  The app now clearly indicates:  
  `⚠️ Restart required to apply pause` / `⚠️ Restart required to resume updates`.
- Introduced a **dedicated restart button** (`🔄 Restart Now`) that performs an **immediate system reboot** with proper privileges.
- Implemented **accurate OS version detection**:  
  - `IsWindows10Only()`  
  - `IsWindows11()`  
  Enables future OS-specific configuration logic.

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## 🔒 Enhanced Security & Update Blocking

- Expanded list of **disabled Windows services** via registry:
  - `WaaSMedicSvc` (fully disabled with `Start = 4` and zeroed `FailureActions`)
  - `uhssvc` (Windows 10 only)
  - Additional services (`wuauserv`, `DoSvc`, `UsoSvc`) are prepared but commented out for safety.
- Added **extra group policies** under `HKLM\SOFTWARE\Policies`:
  - `AllowAutoWindowsUpdateDownloadOverMeteredNetwork = 0` — blocks updates on metered connections.
  - `NoAutoRebootWithLoggedOnUsers = 1` — prevents automatic reboots when users are logged in.
  - `AllowMUUpdateService = 0` — disables Microsoft Update.
  - `PreventDeviceMetadataFromNetwork = 1` — blocks device metadata downloads.
- On resume, **original `FailureActions` are restored** for `WaaSMedicSvc` to ensure service stability.

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## 🖥️ UI & UX Improvements

- **Window is now more compact**:  
  - Old: `455 × 245` → New: `445 × 210`  
  - All UI elements slightly reduced for better visual balance.
- **Improved button press animation**:  
  Replaced downward shift with a **98% scale-down effect** ("press-in" feel).
- Added a **subtle vertical gradient background** for depth and modern aesthetics.
- Shadows and corner radii now **scale with DPI**, ensuring crisp visuals on high-resolution displays.

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## 📏 High-DPI (Per-Monitor V2) Support

- Introduced global `g_app.dpiScale` for consistent scaling.
- Uses `AdjustWindowRectExForDpi()` to **accurately compute window size** including non-client area (borders, title bar).
- Removed legacy `ApplyDpiTransform()` — scaling is now handled at layout level, not render transform.
- Window is **automatically centered on the active monitor** with correct DPI scaling.

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## 🛠 Other Improvements

- **Single-instance logic**: Improved detection of existing window via `EnumWindows` for greater reliability.
- **Status panel behavior**:  
  - In "Restart required" mode, **hover no longer changes the message** (previously showed GitHub link).  
  - GitHub link is only shown when **no restart is pending**.
- Codebase is now **more modular and maintainable**, with dedicated functions for OS version, DPI, and color logic.

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> 💡 **Note**: These changes make the application **more reliable**, **clearer about system requirements**, and **visually polished**, especially on high-DPI and Windows 11 systems.

Author: EXLOUD