fix(debug): stabilize map debug controls

src/hooks/debug/useMapPerformanceDebug.ts

@@ -1,4 +1,5 @@
 import { useDebugFolder } from "@/hooks/debug/useDebugFolder";
+import { Debug } from "@/utils/debug/Debug";
 import {
   MAP_PERFORMANCE_GROUP_NAMES,
   MAP_PERFORMANCE_MODEL_NAMES,
@@ -14,7 +15,9 @@ function toLabel(value: string): string {
 }
 
 export function useMapPerformanceDebug(): void {
-  useDebugFolder("Performance / Map", (folder) => {
+  useDebugFolder("Map", (folder) => {
+    Debug.getInstance().addFogControl(folder);
+
     const {
       groups,
       models,

src/utils/debug/Debug.ts

@@ -17,12 +17,11 @@ interface DebugEvents {
 }
 
 const DEBUG_FOLDER_ORDER = [
-  "La Fabrik",
   "Lighting",
   "Game",
   "Interaction",
   "Hand Tracking",
-  "Performance / Map",
+  "Map",
 ] as const;
 
 function isRecord(value: unknown): value is Record<string, unknown> {
@@ -100,14 +99,13 @@ export class Debug {
       sceneMode: storedControls.sceneMode ?? "game",
     };
 
-    this.gui = this.active ? new GUI({ title: "Debug" }) : null;
+    this.gui = this.active ? new GUI({ title: "La Fabrik" }) : null;
 
     if (this.gui) {
-      const folder = this.createFolder("La Fabrik", { open: true });
+      this.gui.open();
+      this.createOrderedFolders();
 
-      if (!folder) return;
-
-      folder
+      this.gui
         .add(this.controls, "cameraMode", { Player: "player", Debug: "debug" })
         .name("Camera Mode")
         .onChange((value: CameraMode) => {
@@ -115,7 +113,7 @@ export class Debug {
           this.saveAndEmit();
         });
 
-      folder
+      this.gui
         .add(this.controls, "sceneMode", { Game: "game", Physics: "physics" })
         .name("Scene")
         .onChange((value: SceneMode) => {
@@ -123,7 +121,7 @@ export class Debug {
           this.saveAndEmit();
         });
 
-      folder
+      this.gui
         .add(this.controls, "showPerf")
         .name("R3F Perf")
         .onChange((value: boolean) => {
@@ -131,7 +129,7 @@ export class Debug {
           this.emit();
         });
 
-      folder
+      this.gui
         .add(this.controls, "showDebugOverlay")
         .name("Debug Overlay")
         .onChange((value: boolean) => {
@@ -139,14 +137,6 @@ export class Debug {
           this.emit();
         });
 
-      folder
-        .add(this.controls, "fogEnabled")
-        .name("Fog")
-        .onChange((value: boolean) => {
-          this.controls.fogEnabled = value;
-          this.emit();
-        });
-
       const handTrackingFolder = this.createFolder("Hand Tracking");
 
       handTrackingFolder
@@ -180,8 +170,15 @@ export class Debug {
     const existing = this.folders.get(name);
 
     if (existing) {
-      this.folderRefCounts.set(name, (this.folderRefCounts.get(name) ?? 0) + 1);
-      return null;
+      const refCount = this.folderRefCounts.get(name) ?? 0;
+
+      if (refCount > 0) {
+        this.folderRefCounts.set(name, refCount + 1);
+        return null;
+      }
+
+      this.folderRefCounts.set(name, 1);
+      return existing;
     }
 
     const folder = this.gui.addFolder(name);
@@ -198,6 +195,16 @@ export class Debug {
     return folder;
   }
 
+  addFogControl(folder: GUI): void {
+    folder
+      .add(this.controls, "fogEnabled")
+      .name("Fog")
+      .onChange((value: boolean) => {
+        this.controls.fogEnabled = value;
+        this.emit();
+      });
+  }
+
   destroyFolder(name: string): void {
     const folder = this.folders.get(name);
     const refCount = this.folderRefCounts.get(name);
@@ -279,6 +286,27 @@ export class Debug {
     this.emit();
   }
 
+  private createOrderedFolders(): void {
+    for (const folderName of DEBUG_FOLDER_ORDER) {
+      this.ensureFolder(folderName);
+    }
+  }
+
+  private ensureFolder(name: string): GUI | null {
+    if (!this.gui) return null;
+
+    const existing = this.folders.get(name);
+    if (existing) return existing;
+
+    const folder = this.gui.addFolder(name);
+    folder.close();
+    this.folders.set(name, folder);
+    this.folderRefCounts.set(name, 0);
+    this.sortFolders();
+
+    return folder;
+  }
+
   private sortFolders(): void {
     if (!this.gui) return;
 

src/world/vegetation/VegetationSystem.tsx

@@ -1,4 +1,4 @@
-import { Suspense, useMemo, useRef, useState } from "react";
+import { Suspense, useCallback, useMemo, useRef, useState } from "react";
 import { useFrame, useThree } from "@react-three/fiber";
 import { CHUNK_CONFIG } from "@/data/world/fogConfig";
 import { useCameraMode } from "@/hooks/debug/useCameraMode";
@@ -106,16 +106,21 @@ export function VegetationSystem(): React.JSX.Element | null {
   }, [data, groups, models]);
 
   const visibleChunks = streamingEnabled
-    ? chunks.filter((chunk) => activeChunkKeys.has(chunk.key))
+    ? chunks.filter((chunk) => {
+        if (activeChunkKeys.size > 0) {
+          return activeChunkKeys.has(chunk.key);
+        }
+
+        return (
+          Math.hypot(
+            chunk.centerX - camera.position.x,
+            chunk.centerZ - camera.position.z,
+          ) <= CHUNK_CONFIG.loadRadius
+        );
+      })
     : chunks;
 
-  useFrame(({ clock }) => {
-    if (!streamingEnabled) return;
-
-    const now = clock.elapsedTime * 1000;
-    if (now - lastUpdateRef.current < CHUNK_CONFIG.updateInterval) return;
-    lastUpdateRef.current = now;
-
+  const updateActiveChunks = useCallback(() => {
     const nextKeys = new Set<string>();
     const cameraX = camera.position.x;
     const cameraZ = camera.position.z;
@@ -143,6 +148,16 @@ export function VegetationSystem(): React.JSX.Element | null {
     }
 
     setActiveChunkKeys(nextKeys);
+  }, [activeChunkKeys, camera, chunks]);
+
+  useFrame(({ clock }) => {
+    if (!streamingEnabled) return;
+
+    const now = clock.elapsedTime * 1000;
+    if (now - lastUpdateRef.current < CHUNK_CONFIG.updateInterval) return;
+    lastUpdateRef.current = now;
+
+    updateActiveChunks();
   });
 
   if (isLoading || !data) {