perf: reduce graph panel refresh churn during streaming

ui/panel-graph-refresh-utils.js

@@ -0,0 +1,59 @@
+export function resolveVisibleGraphWorkspaceMode({
+  overlayActive = false,
+  isMobile = false,
+  currentTabId = "dashboard",
+  currentGraphView = "graph",
+  currentMobileGraphView = "graph",
+} = {}) {
+  if (!overlayActive) return "hidden";
+  if (isMobile) {
+    if (currentTabId !== "graph") return "hidden";
+    const mobileView = String(currentMobileGraphView || "graph").trim() || "graph";
+    return mobileView === "cognition"
+      ? "mobile:cognition"
+      : mobileView === "summary"
+        ? "mobile:summary"
+        : "mobile:graph";
+  }
+  if (currentTabId === "config") return "hidden";
+  const desktopView = String(currentGraphView || "graph").trim() || "graph";
+  return desktopView === "cognition"
+    ? "desktop:cognition"
+    : desktopView === "summary"
+      ? "desktop:summary"
+      : "desktop:graph";
+}
+
+export function buildVisibleGraphRefreshToken({
+  visibleMode = "hidden",
+  chatId = "",
+  loadState = "",
+  revision = 0,
+  nodeCount = -1,
+  edgeCount = -1,
+  lastProcessedSeq = -1,
+} = {}) {
+  const normalizedMode = String(visibleMode || "hidden").trim() || "hidden";
+  if (normalizedMode === "hidden") return "hidden";
+  const normalizedRevision = Number.isFinite(Number(revision))
+    ? Math.trunc(Number(revision))
+    : 0;
+  const normalizedNodeCount = Number.isFinite(Number(nodeCount))
+    ? Math.trunc(Number(nodeCount))
+    : -1;
+  const normalizedEdgeCount = Number.isFinite(Number(edgeCount))
+    ? Math.trunc(Number(edgeCount))
+    : -1;
+  const normalizedLastProcessedSeq = Number.isFinite(Number(lastProcessedSeq))
+    ? Math.trunc(Number(lastProcessedSeq))
+    : -1;
+  return [
+    normalizedMode,
+    String(chatId || "").trim(),
+    String(loadState || "").trim() || "unknown",
+    normalizedRevision,
+    normalizedNodeCount,
+    normalizedEdgeCount,
+    normalizedLastProcessedSeq,
+  ].join("|");
+}