fix: add context.Canceled checks to get-details and get-versions handlers

internal/api/handlers/v0/registry_error.go

@@ -0,0 +1,22 @@
+package v0
+
+import (
+	"context"
+	"errors"
+	"log"
+
+	"github.com/danielgtaylor/huma/v2"
+)
+
+// RegistryError maps registry errors to HTTP responses; client disconnects
+// must not log as 500s.
+func RegistryError(ctx context.Context, err error, logPrefix string, userMsg string) error {
+	if err == nil {
+		return nil
+	}
+	if errors.Is(err, context.Canceled) || errors.Is(ctx.Err(), context.Canceled) {
+		return huma.NewError(499, "Client closed request", err)
+	}
+	log.Printf("%s failed: %v", logPrefix, err)
+	return huma.Error500InternalServerError(userMsg)
+}

internal/api/handlers/v0/servers.go

@@ -3,7 +3,6 @@ package v0
 import (
 	"context"
 	"errors"
-	"log"
 	"net/http"
 	"net/url"
 	"reflect"
@@ -185,8 +184,7 @@ func RegisterServersEndpoints(api huma.API, pathPrefix string, registry service.
 			if err.Error() == errRecordNotFound || errors.Is(err, database.ErrNotFound) {
 				return nil, huma.Error404NotFound("Server not found")
 			}
-			log.Printf("get server details (%q/%q) failed: %v", serverName, version, err)
-			return nil, huma.Error500InternalServerError("Failed to get server details")
+			return nil, RegistryError(ctx, err, "get server details ("+serverName+"/"+version+")", "Failed to get server details")
 		}
 
 		return &Response[apiv0.ServerResponse]{
@@ -215,8 +213,7 @@ func RegisterServersEndpoints(api huma.API, pathPrefix string, registry service.
 			if err.Error() == errRecordNotFound || errors.Is(err, database.ErrNotFound) {
 				return nil, huma.Error404NotFound("Server not found")
 			}
-			log.Printf("get server versions (%q) failed: %v", serverName, err)
-			return nil, huma.Error500InternalServerError("Failed to get server versions")
+			return nil, RegistryError(ctx, err, "get server versions ("+serverName+")", "Failed to get server versions")
 		}
 
 		// Convert []*ServerResponse to []ServerResponse