Implement Monlet MVP stack and UI updates

server/monlet_server/services/notifiers/http.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+import httpx
+
+
+def classify_response(status: int) -> tuple[bool, bool]:
+    """Return (ok, permanent_failure)."""
+    if 200 <= status < 300:
+        return True, False
+    if 400 <= status < 500 and status not in (408, 425, 429):
+        return False, True
+    return False, False
+
+
+def classify_exception(exc: Exception) -> tuple[bool, bool]:
+    if isinstance(exc, httpx.TimeoutException | httpx.NetworkError):
+        return False, False
+    return False, False