.NET MAUI Mobile App - Open Camera

I have a .NET MAUI app (GitHub link provided after hire). I need rear-camera preview by default (not selfie), capture a still photo, then navigate to a second page that displays the image. Must use native platform APIs only (CameraX/Camera2 on Android, AVFoundation on iOS). No third-party camera packages as I have not found one that works. Using CommunityToolkit.

Scope & Deliverables
Add a Camera page: opens rear camera immediately, live preview, buttons for Capture, Torch, and Back.
Add a Results page: receives the captured image path/stream, displays it full-width, with Share and Retake.
Implement a small cross-platform camera service surface (init, start/stop preview, capture, torch, tap-to-focus).
Wire Shell navigation from Camera → Results and pass the image path.
Save a correctly oriented JPEG to app storage and display it on Results page.
Include permissions, manifests, entitlements, and brief README with build/run steps.

Technical Requirements
Android: Native CameraX (preferred) or Camera2; rear camera selector; proper rotation handling; runtime permissions.
iOS: AVFoundation session with back camera, preview layer, tap-to-focus, torch control.
Works on physical devices: Android 8+ and iOS 15+.
Clean, documented code; no external camera UI libraries.

Acceptance Criteria
App opens to the Camera page and shows rear camera preview immediately.
Capture navigates to the Results page and displays the image.
Torch toggle and tap-to-focus work on both platforms.
JPEGs are correctly oriented; file path is passed reliably.
Builds in Release on a real iPhone and Android phone following the README.

Environment
.NET MAUI targeting net8.0-android and net8.0-ios.
Visual Studio 2022.

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