fix: skip alt-IP detection when querying another IP address

The detectAltIp() function was unconditionally fetching the viewer's own
IPv6/IPv4 address and displaying it alongside queried IP results. Pass
the is_query flag to the client via a data attribute and guard the
alt-IP detection so it only runs when viewing your own IP.

static/script.js

@@ -320,5 +320,7 @@ function initCopyIp(wrap){
     }
   }
 
-  detectAltIp();
+  if(!root.hasAttribute("data-is-query")){
+    detectAltIp();
+  }
 })();

templates/index.html

@@ -67,6 +67,7 @@
     <div itemscope itemtype="https://schema.org/WebPage"
          data-ipv4-domain="{{ ipv4_domain }}"
          data-copied-text="{{ t_copied }}"
+         {% if is_query %}data-is-query="true"{% endif %}
          id="ip-info-root">
     <div class="ip-copy-wrap" data-copied="{{ t_copied }}">
       <h1 class="ip-display" itemprop="name">{{ ip }}</h1>