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/application/ports/trash_ports.rs

@@ -8,16 +8,16 @@ use crate::common::errors::Result;
 pub trait TrashUseCase: Send + Sync {
     /// List items in the user's trash
     async fn get_trash_items(&self, user_id: &str) -> Result<Vec<TrashedItemDto>>;
-    
+
     /// Move a file or folder to trash
     async fn move_to_trash(&self, item_id: &str, item_type: &str, user_id: &str) -> Result<()>;
-    
+
     /// Restore an item from trash to its original location
     async fn restore_item(&self, trash_id: &str, user_id: &str) -> Result<()>;
-    
+
     /// Permanently delete an item from trash
     async fn delete_permanently(&self, trash_id: &str, user_id: &str) -> Result<()>;
-    
+
     /// Empty the trash for a specific user
     async fn empty_trash(&self, user_id: &str) -> Result<()>;
-}
+}