chore: format code and fix bundle identifier for v3.0.0 release

- Format all TypeScript/React code with Prettier
- Format all Rust code with cargo fmt
- Fix bundle identifier from .app to .desktop to avoid macOS conflicts
- Prepare codebase for v3.0.0 Tauri release

src-tauri/build.rs

@@ -1,3 +1,3 @@
 fn main() {
-  tauri_build::build()
+    tauri_build::build()
 }