style: apply cargo fmt to entire codebase

Standardize code formatting across all 173 Rust source files
using rustfmt. No functional changes - purely cosmetic.

This establishes a consistent code style baseline for the
project going forward.

src/domain/entities/mod.rs

@@ -4,17 +4,13 @@ pub mod contact;
 pub mod entity_errors;
 pub mod file;
 pub mod folder;
-pub mod user;
 pub mod session;
 pub mod share;
 pub mod trashed_item;
+pub mod user;
 
 // Re-exportar errores de entidades para facilitar el uso
 pub use entity_errors::{
-    FileError, FileResult,
-    FolderError, FolderResult,
-    UserError, UserResult,
-    ShareError, ShareResult,
-    CalendarError, CalendarResult,
-    CalendarEventError, CalendarEventResult,
-};
+    CalendarError, CalendarEventError, CalendarEventResult, CalendarResult, FileError, FileResult,
+    FolderError, FolderResult, ShareError, ShareResult, UserError, UserResult,
+};