add First Letter column with special epistle handling

src/routes/+page.svelte

@@ -17,6 +17,7 @@
     testamentMatch: boolean;
     sectionMatch: boolean;
     adjacent: boolean;
+    firstLetterMatch: boolean;
   }
 
   let { data }: PageProps = $props();
@@ -87,6 +88,15 @@
     const testamentMatch = book.testament === correctBook.testament;
     const sectionMatch = book.section === correctBook.section;
     const adjacent = isAdjacent(bookId, correctBookId);
+    
+    // Special case: if correct book is Epistles + starts with "1", 
+    // any guess starting with "1" counts as first letter match
+    const correctIsEpistlesWithNumber = correctBook.section === "Epistles" && correctBook.name[0] === "1";
+    const guessStartsWithNumber = book.name[0] === "1";
+    
+    const firstLetterMatch = correctIsEpistlesWithNumber && guessStartsWithNumber
+      ? true
+      : book.name[0].toUpperCase() === correctBook.name[0].toUpperCase();
 
     console.log(
       `Guess: ${book.name} (order ${book.order}), Correct: ${correctBook.name} (order ${correctBook.order}), Adjacent: ${adjacent}`
@@ -110,6 +120,7 @@
         testamentMatch,
         sectionMatch,
         adjacent,
+        firstLetterMatch,
       },
       ...guesses,
     ];
@@ -181,11 +192,21 @@
         const testamentMatch = book.testament === correctBook.testament;
         const sectionMatch = book.section === correctBook.section;
         const adjacent = isAdjacent(bookId, correctBookId);
+        
+        // Apply same first letter logic as in submitGuess
+        const correctIsEpistlesWithNumber = correctBook.section === "Epistles" && correctBook.name[0] === "1";
+        const guessStartsWithNumber = book.name[0] === "1";
+        
+        const firstLetterMatch = correctIsEpistlesWithNumber && guessStartsWithNumber
+          ? true
+          : book.name[0].toUpperCase() === correctBook.name[0].toUpperCase();
+        
         return {
           book,
           testamentMatch,
           sectionMatch,
           adjacent,
+          firstLetterMatch,
         };
       });
     }