**refactor(PhotoDialog, PlatformService): Implement cross-platform photo capture and encapsulated image processing**

- Replace direct camera library with platform-agnostic `PlatformService`
- Move platform-specific image processing logic to respective platform implementations
- Introduce `ImageResult` interface for consistent image handling across platforms
- Add support for native camera and image picker across all platforms
- Simplify `PhotoDialog` by removing platform-specific logic
- Maintain existing cropping and upload functionality
- Improve error handling and logging throughout
- Clean up UI for better user experience
- Add comprehensive documentation for usage and architecture

**BREAKING CHANGE:** Removes direct camera library dependency in favor of `PlatformService`

This change improves separation of concerns, enhances maintainability, and standardizes cross-platform image handling.

src/services/PlatformService.ts

@@ -1,3 +1,8 @@
+export interface ImageResult {
+  blob: Blob;
+  fileName: string;
+}
+
 export interface PlatformService {
   // File system operations
   readFile(path: string): Promise<string>;
@@ -6,8 +11,8 @@ export interface PlatformService {
   listFiles(directory: string): Promise<string[]>;
 
   // Camera operations
-  takePicture(): Promise<string>;
-  pickImage(): Promise<string>;
+  takePicture(): Promise<ImageResult>;
+  pickImage(): Promise<ImageResult>;
 
   // Platform specific features
   isCapacitor(): boolean;