fix(ui): improve config save UX (#1678)

Follow-up to #1609 fix:
- Remove formUnsafe check from canSave (was blocking save even with valid changes)
- Suppress disconnect message for code 1012 (service restart is expected during config save)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

ui/src/ui/app-gateway.ts

@@ -134,7 +134,10 @@ export function connectGateway(host: GatewayHost) {
     },
     onClose: ({ code, reason }) => {
       host.connected = false;
-      host.lastError = `disconnected (${code}): ${reason || "no reason"}`;
+      // Code 1012 = Service Restart (expected during config saves, don't show as error)
+      if (code !== 1012) {
+        host.lastError = `disconnected (${code}): ${reason || "no reason"}`;
+      }
     },
     onEvent: (evt) => handleGatewayEvent(host, evt),
     onGap: ({ expected, received }) => {

ui/src/ui/views/config.ts

@@ -234,8 +234,9 @@ export function renderConfig(props: ConfigProps) {
   const hasChanges = props.formMode === "form" ? diff.length > 0 : hasRawChanges;
 
   // Save/apply buttons require actual changes to be enabled
+  // Note: formUnsafe warns about unsupported schema paths but shouldn't block saving
   const canSaveForm =
-    Boolean(props.formValue) && !props.loading && !formUnsafe;
+    Boolean(props.formValue) && !props.loading;
   const canSave =
     props.connected &&
     !props.saving &&