Upgrade to cashu-ts v4 and drop unused deps.

Adapt amount handling for v4 Amount objects, replace axios/uuid with fetch and crypto.randomUUID, and remove dead helpers.

Co-authored-by: Cursor <cursoragent@cursor.com>

components/redemption.js

@@ -1,4 +1,3 @@
-const { v4: uuidv4 } = require('uuid');
 const crypto = require('crypto');
 const cashu = require('./cashu');
 const lightning = require('./lightning');
@@ -116,7 +115,7 @@ class RedemptionComponent {
    * Perform the complete redemption process
    */
   async performRedemption(token, lightningAddress) {
-    const redeemId = uuidv4();
+    const redeemId = crypto.randomUUID();
     const tokenHash = this.generateTokenHash(token);
 
     try {
@@ -268,45 +267,6 @@ class RedemptionComponent {
     }
   }
 
-  /**
-   * Get redemption status for API response
-   */
-  getRedemptionStatus(redeemId) {
-    const redemption = this.getRedemption(redeemId);
-    
-    if (!redemption) return null;
-
-    const response = {
-      success: true,
-      status: redemption.status,
-      details: {
-        amount: redemption.amount,
-        to: redemption.lightningAddress,
-        paid: redemption.paid,
-        createdAt: redemption.createdAt,
-        updatedAt: redemption.updatedAt
-      }
-    };
-
-    if (redemption.paidAt) response.details.paidAt = redemption.paidAt;
-    if (redemption.fee) response.details.fee = redemption.fee;
-    if (redemption.error) response.details.error = redemption.error;
-    if (redemption.mint) response.details.mint = redemption.mint;
-    if (redemption.domain) response.details.domain = redemption.domain;
-
-    return response;
-  }
-
-  /**
-   * Get all redemptions (for admin/debugging)
-   */
-  getAllRedemptions() {
-    return Array.from(this.redemptions.entries()).map(([id, data]) => ({
-      redeemId: id,
-      ...data
-    }));
-  }
-
   /**
    * Clean up old redemptions (should be called periodically)
    */