Fix: Improve transaction deduplication logic

Ensures deduplication occurs after combining pasted transactions with existing ones to prevent duplicate entries.
-edited src/components/BatchTransactionForm.tsx

src/components/BatchTransactionForm.tsx

@@ -105,28 +105,13 @@ const BatchTransactionForm: React.FC<BatchTransactionFormProps> = ({ onClose, on
   const handlePaste = (value: string) => {
     setPastedData(value);
     const lines = value.trim().split('\n');
-    const transactions: ParsedTransaction[] = [];
-    const seenTransactions = new Set<string>();
     const pasteTransactionMap = new Map<string, ParsedTransaction>();
 
-    // Pre-populate seenTransactions with existing transactions from jobs
-    eligibleJobs.forEach(job => {
-      job.income.forEach(tx => {
-        const key = createTransactionKeyFromRecord(tx);
-        seenTransactions.add(key);
-      });
-    });
-
-    let duplicates = 0;
+    // STEP 1: First combine all identical transactions within the pasted data
     lines.forEach((line, index) => {
       const parsed = parseTransactionLine(line);
       if (parsed) {
         const transactionKey = createTransactionKey(parsed);
-        const isDuplicate = seenTransactions.has(transactionKey);
-
-        if (isDuplicate) {
-          duplicates++;
-        }
 
         // Check if this exact transaction already exists in our paste data
         if (pasteTransactionMap.has(transactionKey)) {
@@ -145,20 +130,37 @@ const BatchTransactionForm: React.FC<BatchTransactionFormProps> = ({ onClose, on
             buyer: parsed.buyer,
             location: parsed.location,
             corporation: parsed.corporation,
-            wallet: parsed.wallet,
-            assignedJobId: !isDuplicate ? findMatchingJob(parsed.itemName) : undefined,
-            isDuplicate
+            wallet: parsed.wallet
           };
           pasteTransactionMap.set(transactionKey, newTransaction);
-
-          if (!isDuplicate) {
-            seenTransactions.add(transactionKey);
-          }
         }
       }
     });
 
-    // Convert map to array for display - each transaction is individual
+    // STEP 2: Now check combined transactions against existing job transactions
+    const existingTransactionKeys = new Set<string>();
+    eligibleJobs.forEach(job => {
+      job.income.forEach(tx => {
+        const key = createTransactionKeyFromRecord(tx);
+        existingTransactionKeys.add(key);
+      });
+    });
+
+    let duplicates = 0;
+    // Update each combined transaction with duplicate status and job assignment
+    pasteTransactionMap.forEach((transaction, key) => {
+      const isDuplicate = existingTransactionKeys.has(key);
+      transaction.isDuplicate = isDuplicate;
+      
+      if (isDuplicate) {
+        duplicates++;
+        transaction.assignedJobId = undefined;
+      } else {
+        transaction.assignedJobId = findMatchingJob(transaction.itemName);
+      }
+    });
+
+    // Convert map to array for display
     const transactionList = Array.from(pasteTransactionMap.values());
     setDuplicatesFound(duplicates);