feat(clickTtHttpPageRoutes): add meta-refresh URL rewriting for proxy handling

- Implemented a new function to rewrite meta-refresh URLs in HTML, ensuring redirects after login are routed through the proxy while maintaining session integrity.
- Updated the proxy GET and POST endpoints to include the new meta-refresh handling, enhancing the overall functionality of the proxy interactions.
- Improved error handling in the new function to ensure robustness in processing HTML content.

backend/services/clickTtHttpPageService.js

@@ -106,15 +106,24 @@ async function fetchWithLogging(options) {
   const baseDomain = extractBaseDomain(url);
   const startTime = Date.now();
 
+  let origin;
+  try { origin = new URL(url).origin + '/'; } catch { origin = 'https://httv.click-tt.de/'; }
   const headers = {
     'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
     'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
     'Accept-Language': 'de,en-US;q=0.7,en;q=0.3',
+    'Referer': origin,
+    'Origin': origin.replace(/\/$/, ''),
     ...customHeaders,
   };
 
   try {
-    const fetchOpts = { method, headers, timeout: 30000 };
+    const fetchOpts = {
+      method,
+      headers,
+      timeout: 30000,
+      redirect: method === 'POST' ? 'manual' : 'follow',
+    };
     if (body && (method === 'POST' || method === 'PUT')) {
       fetchOpts.body = body;
     }