Serialize non-Error promise rejections so unhandled rejections print type/ctor/keys/JSON instead of the unreadable '[object Object]'. Also emit [server health] logs when a health poll returns unhealthy and when polling switches servers, so a red dot in the status popover comes with a logged URL and auth presence. Minor cosmetic: restore session-header StatusPopover import position after the earlier titlebar experiment.
LukeParkerDev
da2e640029