fix: Add exit node bypass suffixes for optimized routing in DomainFronter

Author: abolix

src/relay/domain_fronter.py

@@ -110,6 +110,7 @@ class DomainFronter:
         "sec-fetch-site",
     )
     _SAFE_RETRY_METHODS = {"GET", "HEAD", "OPTIONS"}
+    _EXIT_NODE_BYPASS_SUFFIXES = ("googlevideo.com",)
     _APPS_SCRIPT_DEFAULT_LANG = "en"
 
     def __init__(self, config: dict):
@@ -1389,12 +1390,17 @@ def _exit_node_matches(self, url: str) -> bool:
         """Return True if this URL should be routed through the exit node."""
         if not self._exit_node_enabled or not self._exit_node_url:
             return False
-        if self._exit_node_mode == "full":
-            return True
-        # selective: check if destination hostname matches configured list
         host = self._host_key(url)
         if not host:
             return False
+        # googlevideo flows are large/CPU-heavy; keep them on direct Google relay
+        # and never chain through Cloudflare/Deno/VPS exit nodes.
+        if any(host == suffix or host.endswith("." + suffix)
+               for suffix in self._EXIT_NODE_BYPASS_SUFFIXES):
+            return False
+        if self._exit_node_mode == "full":
+            return True
+        # selective: check if destination hostname matches configured list
         for pattern in self._exit_node_hosts:
             if host == pattern or host.endswith("." + pattern):
                 return True

src/relay/relay_response.py

@@ -250,8 +250,7 @@ def _build_502_html(message: str) -> str:
             gap: 8px;
         }}
         .resource-title {{
-            font-size: 0.72em;
-            text-transform: uppercase;
+            font-size: 0.82em;
             letter-spacing: 0.08em;
             color: #93c5fd;
             margin-right: 6px;