Fix repetition display bug and history find bug

src/history.rs

@@ -9,8 +9,8 @@ use iced::alignment::Horizontal::Center;
 use iced::widget::space::horizontal;
 use iced::widget::*;
 use iced::{Element, Fill, FillPortion, Task};
-use std::sync::Arc;
 use parking_lot::Mutex;
+use std::sync::Arc;
 
 #[derive(Clone)]
 pub struct HistoryState {
@@ -52,14 +52,8 @@ impl HistoryState {
         let history = get_history_of_set(id);
         let words = history
             .iter()
-            .map(|item| {
-                state
-                    .dictionary
-                    .iter()
-                    .find(|w| w.id == item.word_id)
-                    .unwrap()
-                    .clone()
-            })
+            .filter_map(|item| state.dictionary.iter().find(|w| w.id == item.word_id))
+            .cloned()
             .collect();
 
         Self {