Clean up multi-tx signing: remove dead code, fix types and i18n

- Remove unused `parsedRequest.plain` assignment in SignTransactionApi
- Remove staking-specific field parsing (validatorAddress, validatorImageUrl,
  amount) that was not on any type and unused by the handler
- Fix Parsed type for Checkout/Cashlink to map `transaction` → `transactions`
  matching what the parser actually produces
- Make transaction count text reactive to language changes
- Remove unused `.tx-label` CSS rule

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mraveux

src/request/sign-transaction/SignTransaction.css

@@ -222,13 +222,6 @@ nothing breaks in SignMultisigTransaction. */
     opacity: 0.6;
 }
 
-#confirm-transaction .transaction-card .tx-label {
-    font-weight: 600;
-    white-space: nowrap;
-    overflow: hidden;
-    text-overflow: ellipsis;
-}
-
 #confirm-transaction .transaction-card .tx-value {
     font-weight: 600;
     white-space: nowrap;

src/request/sign-transaction/SignTransaction.js

@@ -190,8 +190,12 @@ class SignTransaction {
 
         // Render transaction count
         const $count = /** @type {HTMLElement} */ ($multiTx.querySelector('.transaction-count'));
-        $count.textContent = I18n.translatePhrase('sign-tx-multi-count')
-            .replace('{count}', String(request.transactions.length));
+        const txCount = String(request.transactions.length);
+        const updateCount = () => {
+            $count.textContent = I18n.translatePhrase('sign-tx-multi-count').replace('{count}', txCount);
+        };
+        updateCount();
+        I18n.observer.on(I18n.Events.LANGUAGE_CHANGED, updateCount);
 
         // Render transaction list
         const $list = /** @type {HTMLElement} */ ($multiTx.querySelector('.transaction-list'));

src/request/sign-transaction/SignTransactionApi.js

@@ -74,9 +74,6 @@ class SignTransactionApi extends TopLevelApi {
                     },
                 );
 
-                // Store plain representations for UI display
-                parsedRequest.plain = parsedRequest.transactions.map(tx => tx.toPlain());
-
                 // For single-item arrays, extract senderLabel for backward compatibility
                 if (request.transactions.length === 1) {
                     parsedRequest.senderLabel = this.parseLabel(request.senderLabel);
@@ -134,22 +131,6 @@ class SignTransactionApi extends TopLevelApi {
             parsedRequest.cashlinkMessage = /** @type {string} */(this.parseMessage(request.cashlinkMessage));
         }
 
-        // Parse staking-specific fields (like SignStaking does)
-        if (request.validatorAddress) {
-            parsedRequest.validatorAddress = this.parseAddress(request.validatorAddress, 'validatorAddress', false);
-        }
-
-        if (request.validatorImageUrl) {
-            parsedRequest.validatorImageUrl = this._parseUrl(request.validatorImageUrl, 'validatorImageUrl');
-        }
-
-        if (request.amount) {
-            parsedRequest.amount = this.parseNonNegativeFiniteNumber(request.amount, true, 'amount');
-        }
-
-        // Note: Staking transactions are now supported in multi-transaction signing
-        // The dedicated sign-staking endpoint is still available for backward compatibility
-
         return parsedRequest;
     }
 

types/Keyguard.d.ts

@@ -319,11 +319,15 @@ type Parsed<T extends KeyguardRequest.Request> =
     T extends Is<T, KeyguardRequest.SignTransactionRequestCheckout> ?
         Transform<
             ConstructTransaction<KeyId2KeyInfo<KeyguardRequest.SignTransactionRequestCheckout>>,
-            'shopLogoUrl',
-            { shopLogoUrl?: URL }
+            'shopLogoUrl' | 'transaction',
+            { shopLogoUrl?: URL, transactions: Nimiq.Transaction[] }
         > :
     T extends Is<T, KeyguardRequest.SignTransactionRequestCashlink> ?
-        ConstructTransaction<KeyId2KeyInfo<KeyguardRequest.SignTransactionRequestCashlink>> :
+        Transform<
+            ConstructTransaction<KeyId2KeyInfo<KeyguardRequest.SignTransactionRequestCashlink>>,
+            'transaction',
+            { transactions: Nimiq.Transaction[] }
+        > :
     T extends Is<T, KeyguardRequest.SignMultisigTransactionRequestStandard> ?
         ConstructMultisigTransaction<KeyId2KeyInfo<KeyguardRequest.SignMultisigTransactionRequestStandard>>
         & { layout: KeyguardRequest.SignMultisigTransactionRequestLayout } :