Ensures transaction offset is a valid number

Addresses an issue where the transaction offset could be non-numeric, causing errors in pagination.

Adds validation and parsing to ensure the offset is always an integer, falling back to 0 if necessary.  Also ensures that limit is parsed into an Int.

static/js/index.js

@@ -315,19 +315,31 @@ window.app = Vue.createApp({
     },
     async loadTransactions(offset = null) {
       try {
-        // Use provided offset or current pagination offset
+        // Use provided offset or current pagination offset, ensure it's an integer
-        const currentOffset = offset !== null ? offset : this.transactionPagination.offset
+        let currentOffset = 0
+        if (offset !== null && offset !== undefined) {
+          currentOffset = parseInt(offset)
+        } else if (this.transactionPagination && this.transactionPagination.offset !== null && this.transactionPagination.offset !== undefined) {
+          currentOffset = parseInt(this.transactionPagination.offset)
+        }
+
+        // Final safety check - ensure it's a valid number
+        if (isNaN(currentOffset)) {
+          currentOffset = 0
+        }
+
+        const limit = parseInt(this.transactionPagination.limit) || 20
 
         const response = await LNbits.api.request(
           'GET',
-          `/castle/api/v1/entries/user?limit=${this.transactionPagination.limit}&offset=${currentOffset}`,
+          `/castle/api/v1/entries/user?limit=${limit}&offset=${currentOffset}`,
           this.g.user.wallets[0].inkey
         )
 
         // Update transactions and pagination info
         this.transactions = response.data.entries
         this.transactionPagination.total = response.data.total
-        this.transactionPagination.offset = response.data.offset
+        this.transactionPagination.offset = parseInt(response.data.offset) || 0
         this.transactionPagination.has_next = response.data.has_next
         this.transactionPagination.has_prev = response.data.has_prev
       } catch (error) {