Fix stale data after HA outage recovery

Two bugs caused the module to show outdated data permanently after HA
came back online:

1. refreshTimer was only checked at section level, but config sets it at
   the module config level. The setInterval never started, so there was
   no periodic re-render fallback when the WebSocket died.

2. _closeCircuit replayed queued templates but never reconnected the
   WebSocket. Without WS, no state_changed events fire, so the only
   render path was the (broken) refreshTimer.

Also fixes a race condition in _healthCheck where breaker.state was
briefly set to 'closed' before calling _openCircuit on failure. Now
uses 'half-open' state instead.

MMM-HomeAssistantDisplay.js

@@ -52,15 +52,29 @@ Module.register("MMM-HomeAssistantDisplay", {
 						entity: section.triggerEntities[entity]
 					});
 				}
-				// Set up a timer to trigger re-rendering outside of any entity state update
-				if (section.refreshTimer) {
-					setInterval(()=> {
-						this.renderTemplates("timeout");
-						this.updateDom();
-					}, section.refreshTimer * 1000);
+			}
+		}
+
+		// Refresh timer: check section-level first, then fall back to config-level.
+		// One interval per module instance — renderTemplates already hits all sections.
+		var refreshInterval = null;
+		if (this.config.sections) {
+			for (const sectioid in this.config.sections) {
+				if (this.config.sections[sectioid].refreshTimer) {
+					refreshInterval = this.config.sections[sectioid].refreshTimer;
+					break;
 				}
 			}
 		}
+		if (!refreshInterval && this.config.refreshTimer) {
+			refreshInterval = this.config.refreshTimer;
+		}
+		if (refreshInterval) {
+			setInterval(() => {
+				this.renderTemplates("refreshTimer");
+				this.updateDom();
+			}, refreshInterval * 1000);
+		}
 		this.renderTemplates("foo");
 		self.updateDom(self.config.animationSpeed);
 	},

node_helper.js

@@ -121,6 +121,7 @@ function _getBreaker(identifier) {
 function _openCircuit(identifier) {
 	const breaker = this._getBreaker(identifier);
 	if (breaker.state === 'open') return; // already open
+	// Accepts 'closed' (first failure) or 'half-open' (health check retry failed)
 
 	breaker.state = 'open';
 	breaker.failCount++;
@@ -150,6 +151,16 @@ function _closeCircuit(identifier) {
 		breaker.retryTimer = null;
 	}
 
+	// Reconnect WebSocket — it likely died during the outage and won't
+	// recover on its own because the frontend only sends RECONNECT_WS in
+	// response to HASSWS_DISCONNECTED, which the node_helper may never
+	// have emitted if the socket died silently.
+	const conn = this.connections[identifier];
+	if (conn && conn.connectionConfig) {
+		this.logger.info(`Reconnecting WebSocket for ${identifier} after circuit recovery`);
+		this.backoffWSConnection(identifier, conn.connectionConfig);
+	}
+
 	// Replay queued template evaluations
 	const queue = breaker.pendingQueue.splice(0);
 	if (queue.length > 0) {
@@ -189,8 +200,8 @@ async function _healthCheck(identifier) {
 		this._closeCircuit(identifier);
 	} catch (err) {
 		this.logger.info(`Health check failed for ${identifier}: ${err.message}`);
-		// Re-arm with increased backoff
-		breaker.state = 'closed'; // briefly close so _openCircuit fires
+		// Re-arm with increased backoff — reset state so _openCircuit can fire
+		breaker.state = 'half-open';
 		this._openCircuit(identifier);
 	}
 }
@@ -277,7 +288,8 @@ async function connect(payload) {
 	this.logger.info(`HomeAssistant connected for ${payload.identifier}`);
 	this.connections[payload.identifier] = {
 		hass,
-		entities: []
+		entities: [],
+		connectionConfig,
 	};
 
 	await this.backoffWSConnection(payload.identifier, connectionConfig)