turn folder arg into flag for message copy, move and delete cmds

src/email/message/command/copy.rs

@@ -8,7 +8,7 @@ use crate::{
     cache::arg::disable::CacheDisableFlag,
     config::TomlConfig,
     envelope::arg::ids::EnvelopeIdsArgs,
-    folder::arg::name::{SourceFolderNameArg, TargetFolderNameArg},
+    folder::arg::name::{SourceFolderNameOptionalFlag, TargetFolderNameArg},
     printer::Printer,
 };
 
@@ -16,7 +16,7 @@ use crate::{
 #[derive(Debug, Parser)]
 pub struct MessageCopyCommand {
     #[command(flatten)]
-    pub source_folder: SourceFolderNameArg,
+    pub source_folder: SourceFolderNameOptionalFlag,
 
     #[command(flatten)]
     pub target_folder: TargetFolderNameArg,

src/email/message/command/delete.rs

@@ -44,6 +44,6 @@ impl MessageDeleteCommand {
         let ids = &self.envelopes.ids;
         backend.delete_messages(folder, ids).await?;
 
-        printer.print("Message(s) successfully deleted from {from_folder} to {to_folder}!")
+        printer.print(format!("Message(s) successfully removed from {folder}!"))
     }
 }

src/email/message/command/move_.rs

@@ -8,7 +8,7 @@ use crate::{
     cache::arg::disable::CacheDisableFlag,
     config::TomlConfig,
     envelope::arg::ids::EnvelopeIdsArgs,
-    folder::arg::name::{SourceFolderNameArg, TargetFolderNameArg},
+    folder::arg::name::{SourceFolderNameOptionalFlag, TargetFolderNameArg},
     printer::Printer,
 };
 
@@ -16,7 +16,7 @@ use crate::{
 #[derive(Debug, Parser)]
 pub struct MessageMoveCommand {
     #[command(flatten)]
-    pub source_folder: SourceFolderNameArg,
+    pub source_folder: SourceFolderNameOptionalFlag,
 
     #[command(flatten)]
     pub target_folder: TargetFolderNameArg,