perf: optimize persist delta gating and diagnostics

runtime/runtime-debug.js

@@ -28,6 +28,8 @@ const runtimeDebugState = {
   taskLlmRequests: {},
   injections: {},
   taskTimeline: [],
+  graphPersistence: null,
+  graphLayout: null,
   updatedAt: "",
 };
 
@@ -41,6 +43,8 @@ export function resetRuntimeDebugSnapshot() {
   runtimeDebugState.taskLlmRequests = {};
   runtimeDebugState.injections = {};
   runtimeDebugState.taskTimeline = [];
+  runtimeDebugState.graphPersistence = null;
+  runtimeDebugState.graphLayout = null;
   runtimeDebugState.updatedAt = nowIso();
 }
 
@@ -76,6 +80,26 @@ export function recordInjectionSnapshot(kind, snapshot = {}) {
   touchRuntimeDebugState();
 }
 
+export function recordGraphPersistenceSnapshot(snapshot = null) {
+  runtimeDebugState.graphPersistence = snapshot
+    ? {
+        updatedAt: nowIso(),
+        ...safeClone(snapshot, {}),
+      }
+    : null;
+  touchRuntimeDebugState();
+}
+
+export function recordGraphLayoutSnapshot(snapshot = null) {
+  runtimeDebugState.graphLayout = snapshot
+    ? {
+        updatedAt: nowIso(),
+        ...safeClone(snapshot, {}),
+      }
+    : null;
+  touchRuntimeDebugState();
+}
+
 export function getRuntimeDebugSnapshot() {
   return safeClone(
     {
@@ -84,6 +108,8 @@ export function getRuntimeDebugSnapshot() {
       taskLlmRequests: runtimeDebugState.taskLlmRequests,
       injections: runtimeDebugState.injections,
       taskTimeline: runtimeDebugState.taskTimeline,
+      graphPersistence: runtimeDebugState.graphPersistence,
+      graphLayout: runtimeDebugState.graphLayout,
       updatedAt: runtimeDebugState.updatedAt,
     },
     {
@@ -92,6 +118,8 @@ export function getRuntimeDebugSnapshot() {
       taskLlmRequests: {},
       injections: {},
       taskTimeline: [],
+      graphPersistence: null,
+      graphLayout: null,
       updatedAt: "",
     },
   );

runtime/settings-defaults.js

@@ -112,6 +112,18 @@ export const defaultSettings = {
   embeddingBackendApiUrl: "",
   embeddingAutoSuffix: true,
 
+  // Native 性能加速（灰度）
+  graphUseNativeLayout: false,
+  graphNativeLayoutThresholdNodes: 280,
+  graphNativeLayoutThresholdEdges: 1600,
+  graphNativeLayoutWorkerTimeoutMs: 260,
+  persistUseNativeDelta: false,
+  persistNativeDeltaThresholdRecords: 20000,
+  persistNativeDeltaThresholdStructuralDelta: 600,
+  persistNativeDeltaThresholdSerializedChars: 4000000,
+  nativeEngineFailOpen: true,
+  graphNativeForceDisable: false,
+
   // Schema
   nodeTypeSchema: null,