fix: Folder limit cannot be empty #97

src/modules/account/migration.rs

@@ -421,6 +421,12 @@ impl AccountV3 {
             new.folder_limit = Some(folder_limit);
         }
 
+        if let Some(clear_folder_limit) = request.clear_folder_limit {
+            if clear_folder_limit {
+                new.folder_limit = None;
+            }
+        }
+
         if let Some(name) = &request.name {
             if name.trim().is_empty() {
                 new.name = None;

src/modules/account/payload.rs

@@ -127,6 +127,7 @@ pub struct AccountUpdateRequest {
     /// otherwise sync up to `n` most recent emails (min 10).
     #[oai(validator(minimum(value = "100")))]
     pub folder_limit: Option<u32>,
+    pub clear_folder_limit: Option<bool>,
     /// Configuration for selective folder (mailbox/label) synchronization
     ///
     /// - For IMAP/SMTP accounts:
@@ -166,6 +167,13 @@ impl AccountUpdateRequest {
             ));
         }
 
+        if self.clear_folder_limit == Some(true) && self.folder_limit.is_some() {
+            return Err(raise_error!(
+                "clear_folder_limit cannot be combined with folder_limit".into(),
+                ErrorCode::InvalidParameter
+            ));
+        }
+
         if self.clear_date_range == Some(true)
             && (self.date_since.is_some() || self.date_before.is_some())
         {