feat(agent,server): v0.2.7 - mu-plugin WordPress robuste, réparation wp-config, proxy cookies/headers

- Agent: mu-plugin embarqué amélioré (HTTPS forcé, filtres URL, localhost:port)
- Agent: suppression des WP_HOME/WP_SITEURL hardcodés au démarrage des instances
- Server/proxy: envoi X-Forwarded-Port, réécriture headers/body élargie
- Server/proxy: sanitization des Set-Cookie (Secure, SameSite, Domain)
- Dashboard: version agent 0.2.7, action Supprimer complète
- Cleanup: binaires agent 0.2.3-0.2.6 remplacés par 0.2.7

server/app/api/proxy/[[...path]]/route.ts

@@ -25,12 +25,22 @@ async function proxyRequest(req: NextRequest) {
     );
   }
 
+  const publicUrl = `https://${cleanHost}`;
   const targetUrl = new URL(req.url);
-  const upstream = `http://${instance.node.tailscaleIp}:${instance.port}${targetUrl.pathname}${targetUrl.search}`;
+  // The middleware rewrites /foo to /api/proxy/foo; strip the prefix before forwarding
+  let pathname = targetUrl.pathname;
+  if (pathname.startsWith("/api/proxy")) {
+    pathname = pathname.slice("/api/proxy".length) || "/";
+  }
+  const upstream = `http://${instance.node.tailscaleIp}:${instance.port}${pathname}${targetUrl.search}`;
 
   const headers = new Headers(req.headers);
   headers.delete("host");
   headers.set("host", cleanHost);
+  headers.set("x-forwarded-host", cleanHost);
+  headers.set("x-forwarded-proto", "https");
+  headers.set("x-forwarded-port", "443");
+  headers.set("x-forwarded-for", req.headers.get("x-forwarded-for") || "unknown");
 
   const upstreamRes = await fetch(upstream, {
     method: req.method,
@@ -47,7 +57,78 @@ async function proxyRequest(req: NextRequest) {
   responseHeaders.delete("content-encoding");
   responseHeaders.delete("content-length");
 
-  return new Response(upstreamRes.body, {
+  // Rewrite any header values that point to localhost or the internal Tailscale address
+  const localPatterns = [
+    `http://${instance.node.tailscaleIp}:${instance.port}`,
+    `https://${instance.node.tailscaleIp}:${instance.port}`,
+    `http://localhost:${instance.port}`,
+    `https://localhost:${instance.port}`,
+    `http://localhost`,
+    `https://localhost`,
+  ];
+  responseHeaders.forEach((value, key) => {
+    let newValue = value;
+    for (const pattern of localPatterns) {
+      newValue = newValue.replaceAll(pattern, publicUrl);
+    }
+    if (newValue !== value) {
+      responseHeaders.set(key, newValue);
+    }
+  });
+
+  // Sanitize Set-Cookie headers so sessions work through the public domain.
+  // WordPress may issue cookies for "localhost" or without Secure flag; fix it.
+  const setCookies = responseHeaders.getSetCookie();
+  if (setCookies.length > 0) {
+    responseHeaders.delete("set-cookie");
+    for (let cookie of setCookies) {
+      // Drop any Domain=... set for localhost/internal domains
+      cookie = cookie.replace(/;\s*Domain=[^;]+/gi, "");
+      // Ensure Secure is present for HTTPS public URLs
+      if (!/;\s*Secure\b/i.test(cookie)) {
+        cookie += "; Secure";
+      }
+      // Make sure cookies are sent on sub-domain navigations
+      if (!/;\s*SameSite\b/i.test(cookie)) {
+        cookie += "; SameSite=Lax";
+      }
+      responseHeaders.append("set-cookie", cookie);
+    }
+  }
+
+  const contentType = responseHeaders.get("content-type") || "";
+  const shouldRewriteBody =
+    contentType.includes("text/html") ||
+    contentType.includes("text/css") ||
+    contentType.includes("application/javascript") ||
+    contentType.includes("application/json");
+
+  if (!shouldRewriteBody) {
+    return new Response(upstreamRes.body, {
+      status: upstreamRes.status,
+      statusText: upstreamRes.statusText,
+      headers: responseHeaders,
+    });
+  }
+
+  // For text responses, rewrite localhost/internal URLs to the public URL
+  let body = await upstreamRes.text();
+  const localBase = `http://${instance.node.tailscaleIp}:${instance.port}`;
+  const localBaseHttps = `https://${instance.node.tailscaleIp}:${instance.port}`;
+  const localLocalhostHttp = `http://localhost:${instance.port}`;
+  const localLocalhostHttps = `https://localhost:${instance.port}`;
+  const localLocalhostPlainHttp = `http://localhost`;
+  const localLocalhostPlainHttps = `https://localhost`;
+
+  body = body
+    .replaceAll(localBase, publicUrl)
+    .replaceAll(localBaseHttps, publicUrl)
+    .replaceAll(localLocalhostHttp, publicUrl)
+    .replaceAll(localLocalhostHttps, publicUrl)
+    .replaceAll(localLocalhostPlainHttp, publicUrl)
+    .replaceAll(localLocalhostPlainHttps, publicUrl);
+
+  return new Response(body, {
     status: upstreamRes.status,
     statusText: upstreamRes.statusText,
     headers: responseHeaders,