chore: apply clippy --fix

* Fix clippy

* cargo fmt

Refs: #689

src/imap/envelope/list.rs

@@ -182,8 +182,10 @@ fn map_envelopes_table_entries(
     let mut entries: Vec<EnvelopesTableEntry> = data
         .into_iter()
         .map(|(seq, items)| {
-            let mut entry = EnvelopesTableEntry::default();
-            entry.seq = seq.get();
+            let mut entry = EnvelopesTableEntry {
+                seq: seq.get(),
+                ..Default::default()
+            };
 
             for item in items.into_iter() {
                 match item {

src/imap/envelope/thread.rs

@@ -154,10 +154,8 @@ fn fetch_subjects(
 
         for item in items.into_iter() {
             match item {
-                MessageDataItem::Uid(uid_val) => {
-                    if uid {
-                        id = uid_val.get();
-                    }
+                MessageDataItem::Uid(uid_val) if uid => {
+                    id = uid_val.get();
                 }
                 MessageDataItem::Envelope(env) => {
                     // NString wraps Option<IString>, access via .0