Add request interception for getgeoidx API calls

- Introduced a new script (inject.js) to override the fetch and XMLHttpRequest methods to capture requests to the "getgeoidx" endpoint.
- Captured request body and URL, and sent the data to the extension via postMessage.
- Added intercept.js to inject the new script into the page and listen for messages to forward captured data to the extension.

js/inject.js

@@ -0,0 +1,38 @@
+(function() {
+  const origFetch = window.fetch;
+  window.fetch = async function(input, init = {}) {
+    const url = typeof input === "string" ? input : input.url;
+    if (url.endsWith("getgeoidx")) {
+      let body = init.body || null;
+      if (body instanceof ArrayBuffer) {
+        body = new TextDecoder().decode(new Uint8Array(body));
+      } else if (body instanceof Blob) {
+        body = await new Response(body).text();
+      } else if (body != null && typeof body !== "string") {
+        try { body = JSON.stringify(body); } catch(e) { body = String(body); }
+      }
+      window.postMessage({ type: "ZMS_CAPTURE", url, body }, "*");
+    }
+    return origFetch.apply(this, arguments);
+  };
+
+  // patch XMLHttpRequest to catch getgeoidx
+  const origOpen = XMLHttpRequest.prototype.open;
+  const origSend = XMLHttpRequest.prototype.send;
+  XMLHttpRequest.prototype.open = function(method, url, ...rest) {
+    this._zms_url = url;
+    return origOpen.call(this, method, url, ...rest);
+  };
+  XMLHttpRequest.prototype.send = function(body) {
+    if (this._zms_url && this._zms_url.endsWith("getgeoidx")) {
+      let captured = body;
+      if (body instanceof ArrayBuffer) {
+        captured = new TextDecoder().decode(new Uint8Array(body));
+      } else if (body != null && typeof body !== "string") {
+        try { captured = JSON.stringify(body); } catch(e) { captured = String(body); }
+      }
+      window.postMessage({ type: "ZMS_CAPTURE", url: this._zms_url, body: captured }, "*");
+    }
+    return origSend.call(this, body);
+  };
+})();