fix(3d): 概览模式常驻显示模块标签与功能副标题，解决 3D 物体无法对应到功能

复现确认：3D 概览中行星虽渲染但默认无标签（仅悬浮显示），且功能副标题受新手期门控（首潜完成后消失），用户看到一堆无名彩色球体，无法把物体对应到功能（内测反馈'3D物体不可用'的真实根因）。修复：① SpatialNav 在概览模式(!isInModule)默认显示标签；② AuroraModuleEntity/ModuleEntity 的功能副标题改为常驻（移除 isNewbie 门控），始终展示'隐喻名 · 功能名'（如 深潜 · 专注番茄钟）。浏览器实测：标签可见、点击行星正确跳转对应模块。

Author: Aparencia

client/src/lib/3d/navigation/SpatialNav.tsx

@@ -115,7 +115,7 @@ export function SpatialNav() {
               emissiveColor={config.emissiveColor}
               isHovered={hoveredModule === module.id || highlightAll}
               isActive={currentModule === module.id}
-              showLabel={highlightAll}
+              showLabel={highlightAll || !isInModule}
               onClick={() => handleModuleClick(module.id)}
               onPointerOver={() => handleHover(module.id)}
               onPointerOut={() => handleHover(null)}
@@ -143,7 +143,7 @@ export function SpatialNav() {
             orbitSpeed={config.orbitSpeed}
             initialAngle={config.initialAngle}
             isActive={currentModule === module.id}
-            showLabel={highlightAll}
+            showLabel={highlightAll || !isInModule}
             onClick={handleModuleClick}
             onHover={handleHover}
           />

client/src/lib/3d/objects/AuroraModuleEntity.tsx

@@ -9,7 +9,6 @@ import { useFrame } from '@react-three/fiber';
 import * as THREE from 'three';
 import { Float, Html } from '@react-three/drei';
 import type { ModuleId } from '../navigation/OrbitalStore';
-import { useIsNewbiePhase } from '@/features/onboarding/firstDive/useFirstDiveStore';
 import { getModuleSubtitle } from '@/features/onboarding/firstDive/moduleSubtitles';
 
 export interface AuroraModuleEntityProps {
@@ -55,8 +54,7 @@ export function AuroraModuleEntity({
   const ringRef = useRef<THREE.Mesh>(null);
   const [hovered, setHovered] = useState(false);
   const angleRef = useRef(initialAngle);
-  // 新手期双标签（首潜完成后自动隐去）
-  const isNewbie = useIsNewbiePhase();
+  // 功能副标题：隐喻名（深潜/结礁…）无法自解释，常驻直白功能名确保用户能把行星对应到功能
   const subtitle = getModuleSubtitle(id);
 
   const config = PLANET_CONFIGS[id];
@@ -173,8 +171,8 @@ export function AuroraModuleEntity({
             >
               <div className="rounded-lg bg-slate-900/80 px-3 py-1.5 text-sm font-medium text-white backdrop-blur-sm whitespace-nowrap border border-indigo-500/30">
                 {config.label}
-                {/* 新手期双标签：隐喻名旁附直白副标题 */}
-                {isNewbie && subtitle && (
+                {/* 常驻功能副标题：隐喻名旁附直白功能名 */}
+                {subtitle && (
                   <span className="ml-1.5 text-xs text-white/50">· {subtitle}</span>
                 )}
               </div>

client/src/lib/3d/objects/ModuleEntity.tsx

@@ -8,7 +8,6 @@ import { useRef } from 'react';
 import { useFrame } from '@react-three/fiber';
 import * as THREE from 'three';
 import { Float, Html } from '@react-three/drei';
-import { useIsNewbiePhase } from '@/features/onboarding/firstDive/useFirstDiveStore';
 import { getModuleSubtitle } from '@/features/onboarding/firstDive/moduleSubtitles';
 
 type GeometryType = 'dodecahedron' | 'torus' | 'box' | 'sphere' | 'octahedron' | 'icosahedron';
@@ -82,8 +81,7 @@ export function ModuleEntity({
 }: ModuleEntityProps) {
   const meshRef = useRef<THREE.Mesh>(null);
   const materialRef = useRef<THREE.MeshStandardMaterial>(null);
-  // 新手期双标签（首潜完成后自动隐去）
-  const isNewbie = useIsNewbiePhase();
+  // 功能副标题：隐喻名（深潜/结礁…）无法自解释，常驻直白功能名确保用户能把几何体对应到功能
   const subtitle = getModuleSubtitle(id);
 
   // Each entity has a unique rotation axis and speed
@@ -160,8 +158,8 @@ export function ModuleEntity({
           >
             <div className="rounded-lg bg-slate-900/80 px-3 py-1.5 text-sm font-medium text-white backdrop-blur-sm whitespace-nowrap border border-indigo-500/30">
               {label}
-              {/* 新手期双标签：隐喻名旁附直白副标题 */}
-              {isNewbie && subtitle && (
+              {/* 常驻功能副标题：隐喻名旁附直白功能名 */}
+              {subtitle && (
                 <span className="ml-1.5 text-xs text-white/50">· {subtitle}</span>
               )}
             </div>