Fix TypeScript errors in installmentMonthly translation calls

- Convert installmentMonth string to number for count parameter
- Fix type mismatch: t() expects count as number, not string
- Updated files: list-item.tsx, billing-info-section.tsx

Fixes compilation errors where { count: string } was incompatible
with TOptionsBase requirement of count: number.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/entities/transaction/ui/list-item.tsx

@@ -166,7 +166,7 @@ export const ListItem = ({
             (!!installmentMonth && parseInt(installmentMonth) > 1) && 
               <>
                 <span className="separator">|</span>
-                <span>{ t('transaction.fields.installmentMonthly', { count: installmentMonth }) }</span>
+                <span>{ t('transaction.fields.installmentMonthly', { count: parseInt(installmentMonth) }) }</span>
               </>
           }
         </div>
@@ -199,7 +199,7 @@ export const ListItem = ({
             (!!installmentMonth && parseInt(installmentMonth) > 1) && 
               <>
                 <span className="separator">|</span>
-                <span>{ t('transaction.fields.installmentMonthly', { count: installmentMonth }) }</span>
+                <span>{ t('transaction.fields.installmentMonthly', { count: parseInt(installmentMonth) }) }</span>
               </>
           }
         </div>

src/entities/transaction/ui/section/billing-info-section.tsx

@@ -16,7 +16,7 @@ export const BillingInfoSection = ({
           className="kv-row"
         >
           <span className="k">{ t('transaction.fields.installmentMonth') }</span>
-          <span className="v">{ t('transaction.fields.installmentMonthly', { count: billingInfo?.installmentMonth }) }</span>
+          <span className="v">{ t('transaction.fields.installmentMonthly', { count: parseInt(billingInfo?.installmentMonth || '0') }) }</span>
         </li>
       );
     }