feat: Add thousands separator to price and fixed validation of listing

sales.py

@@ -49,7 +49,7 @@ class Listing:
         <div class="card" style="margin: 10px;">
             <div class="card-body">
                 <h4 class="card-title">{self.domain}/ <a style='text-decoration:none;' href="/verify/{self.domain}">✅</a></h4>
-                <h6 class="text-muted card-subtitle mb-2">{self.price} HNS</h6>
+                <h6 class="text-muted card-subtitle mb-2">{self.price:,} HNS</h6>
                 <p class="card-text">{self.description}</p>
                 <p class="card-text">Contact: <code>{self.contact}</code></p>
                 <a href="/delete/{self.domain}" class="btn btn-info">Delete Listing</a>
@@ -72,7 +72,7 @@ class Listing:
 
     def txValid(self):
         # TODO Validate tx is valid
-        return True
+        return False
 
 # endregion
 
@@ -113,8 +113,11 @@ def saveListings(listings:list[Listing]):
         f.write(json.dumps(listings,default=Listing.toJSON,indent=4))
 
 def add_listing(listing:Listing):
-    if not listing.txValid():
-        return "Invalid tx"
+    # if not listing.txValid():
+    #     return "Invalid tx"
+
+    if not listing.signed():
+        return "Not signed"
 
     # Remove any listings with the same domain
     remove_listing(listing.domain)