Highlight yesterday's words which were guessed correctly

Previously, yesterday's word list did not indicate which words were
guessed correctly. With this change, yesterday's correct guesses are
kept around, and a subtle green background is used for each word in
yesterday's word list that was guessed correctly.

src/App.vue

@@ -245,6 +245,10 @@ h2 span {
   font-weight: bold;
 }
 
+.guessed-yesterday {
+  background-color: #d4e7d4;
+}
+
 .toast-message {
   max-width: 80%;
   margin: 0, 1em;
@@ -258,6 +262,9 @@ html.dark {
   .pangram {
     color: $bl-yellow;
   }
+  .guessed-yesterday {
+    background-color: #1e321e;
+  }
 }
 
 @media only screen and (max-height: 500px) {

src/store.ts

@@ -24,6 +24,7 @@ export const useMainStore = defineStore({
       "" as string
     ),
     yesterdaysMiddleLetter: useStorage("yesterdaysMiddleLetter", "" as string),
+    yesterdaysCorrectGuesses: useStorage("yesterdaysCorrectGuesses", new Set([]) as Set<string>),
     theme: useStorage("theme", "light" as string),
     // don't need to be in local storage because they doesn't change
     pointsMessages: {
@@ -158,8 +159,6 @@ export const useMainStore = defineStore({
 
       // set gameDate to clear guesses tomorrow
       this.gameDate = now;
-      // new game so reset guesses
-      this.correctGuesses = new Set([]);
 
       const { todaysAnswerObj, yesterdaysAnswerObj } = generateAnswerObjs({
         allAnswers,
@@ -173,6 +172,9 @@ export const useMainStore = defineStore({
       this.answers = answers;
       this.availableLetters = availableLetters;
       this.middleLetter = middleLetter;
+
+      // new game so reset guesses
+      this.correctGuesses = new Set([]);
     },
     setYesterdaysAnswersAndLastGameDate({
       yesterdaysAnswerObj,
@@ -188,6 +190,7 @@ export const useMainStore = defineStore({
         this.yesterdaysAnswers = this.answers;
         this.yesterdaysAvailableLetters = this.availableLetters;
         this.yesterdaysMiddleLetter = this.middleLetter;
+        this.yesterdaysCorrectGuesses = this.correctGuesses;
         return "local-storage-cache";
       } else {
         const {
@@ -223,10 +226,15 @@ export const useMainStore = defineStore({
       return `${$t(`points.${message}`)}! +${points}`;
     },
     cellClassName({ row, columnIndex }: { row: any; columnIndex: number }) {
+      let className = "";
       const word = row[columnIndex + 1];
       if (word && this.isPangram({ word })) {
-        return "pangram";
+        className += "pangram ";
+      }
+      if (word && this.yesterdaysCorrectGuesses.has(word)) {
+        className += "guessed-yesterday "
       }
+      return className
     },
   },
 });