nav: 统一 NavNode schema + runtime/roadmap 分离 + 城市补父级

- navigation/nav-schema.js: 统一 NavNode schema 定义
- navigation/runtime-nav.js: MVP runtime（仅 6 城市 active）
- navigation/future-catalog.js: 路线图数据（不进 runtime）
- 旧索引文件标注 @deprecated，重定向到新路径
- 6 城市补 countryId/regionId
- game-design 明确 MVP vs V1.1+ 导航边界

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

js/content/cities/seoul.js

@@ -1,9 +1,13 @@
-module.exports = {
+import { createLevelPresets } from '../shared/level-presets.js'
+
+export const seoul = {
   id: 'seoul',
   contentVersion: 1,
   continentId: 'asia',
+  countryId: 'korea',
+  regionId: null,
   sortOrder: 4,
-  unlockAfterCityId: 'bangkok',
+  unlockAfterCityId: 'singapore',
   bundle: {
     packId: 'asia-rest',
     preload: 'on-city-page',
@@ -11,54 +15,45 @@ module.exports = {
   display: {
     name: '首尔',
     nameEn: 'Seoul',
-    bgColor: '#4A90D9',
-    tagline: '景福宫前遇猫猫',
-    funFact: '首尔的地铁系统覆盖率全球第一',
+    bgColor: '#5C7AEA',
+    tagline: '首尔夜景看猫猫',
+    funFact: '首尔是东亚流行文化重镇',
   },
   cover: {
     catImage: 'images/cats/cat_seoul.png',
     catThumb: 'images/cats/cat_seoul_thumb.png',
-    shareAccent: '#F5E6CA',
+    shareAccent: '#86A8E7',
   },
   cat: {
     id: 'cat_seoul',
     name: '韩韩',
-    intro: '戴韩服小帽的韩国短尾猫，爱在景福宫前眨眼卖萌',
-    baseColor: '#F5E6CA',
-    pattern: 'bicolor',
-    patternColor: '#D4A574',
+    baseColor: '#B0B7C3',
+    pattern: 'short-tail',
     accessory: '韩服小帽',
-    expression: 'wink',
   },
   passport: {
     stampId: 'stamp_seoul',
     stampLabel: '首尔',
   },
   elements: [
-    { id: 'seoul_01', name: '泡菜坛', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_01.png', tags: ['fermented', 'jar', 'red'] },
-    { id: 'seoul_02', name: '石锅拌饭', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_02.png', tags: ['rice', 'hot', 'colorful'] },
-    { id: 'seoul_03', name: '韩服', category: 'culture', rarity: 'core', image: 'images/elements/seoul/seoul_03.png', tags: ['clothing', 'traditional', 'colorful'] },
-    { id: 'seoul_04', name: '景福宫', category: 'landmark', rarity: 'core', image: 'images/elements/seoul/seoul_04.png', tags: ['palace', 'historic', 'grand'] },
-    { id: 'seoul_05', name: '烧酒瓶', category: 'item', rarity: 'core', image: 'images/elements/seoul/seoul_05.png', tags: ['drink', 'green', 'bottle'] },
-    { id: 'seoul_06', name: '年糕', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_06.png', tags: ['sweet', 'chewy', 'white'] },
-    { id: 'seoul_07', name: 'K-pop话筒', category: 'item', rarity: 'core', image: 'images/elements/seoul/seoul_07.png', tags: ['music', 'pop', 'shiny'] },
-    { id: 'seoul_08', name: '太极旗扇', category: 'culture', rarity: 'core', image: 'images/elements/seoul/seoul_08.png', tags: ['flag', 'fan', 'national'] },
-    { id: 'seoul_09', name: '韩式炸鸡', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_09.png', tags: ['fried', 'crispy', 'golden'] },
-    { id: 'seoul_10', name: '柿子', category: 'nature', rarity: 'core', image: 'images/elements/seoul/seoul_10.png', tags: ['fruit', 'orange', 'autumn'] },
-    { id: 'seoul_11', name: '海苔卷', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_11.png', tags: ['seaweed', 'roll', 'green'] },
-    { id: 'seoul_12', name: '南山塔', category: 'landmark', rarity: 'core', image: 'images/elements/seoul/seoul_12.png', tags: ['tower', 'romantic', 'iconic'] },
-    { id: 'seoul_13', name: '木槿花', category: 'nature', rarity: 'core', image: 'images/elements/seoul/seoul_13.png', tags: ['flower', 'pink', 'national'] },
-  ],
-  levelPresets: [
-    { id: 1, difficultyTier: 'intro',     seedBase: 14001, elementCount: 6,  piecesPerElement: 3, layers: 2, density: 'low',         targetPassRate: 0.95, targetDurationSec: [60, 120] },
-    { id: 2, difficultyTier: 'easy',      seedBase: 14002, elementCount: 7,  piecesPerElement: 3, layers: 2, density: 'low',         targetPassRate: 0.90, targetDurationSec: [60, 120] },
-    { id: 3, difficultyTier: 'normal',    seedBase: 14003, elementCount: 8,  piecesPerElement: 3, layers: 3, density: 'medium',      targetPassRate: 0.80, targetDurationSec: [90, 150] },
-    { id: 4, difficultyTier: 'normal',    seedBase: 14004, elementCount: 9,  piecesPerElement: 3, layers: 3, density: 'medium',      targetPassRate: 0.70, targetDurationSec: [90, 150] },
-    { id: 5, difficultyTier: 'hard',      seedBase: 14005, elementCount: 10, piecesPerElement: 3, layers: 4, density: 'medium_high', targetPassRate: 0.60, targetDurationSec: [120, 180] },
-    { id: 6, difficultyTier: 'boss',      seedBase: 14006, elementCount: 10, piecesPerElement: [3,3,3,3,3,6,3,3,3,3], layers: 4, density: 'high', targetPassRate: 0.55, targetDurationSec: [120, 240] },
+    { id: 'seoul_01', name: '景福宫', category: 'landmark', rarity: 'core', image: 'images/elements/seoul/seoul_01.png', tags: ['palace'] },
+    { id: 'seoul_02', name: '南山塔', category: 'landmark', rarity: 'core', image: 'images/elements/seoul/seoul_02.png', tags: ['tower'] },
+    { id: 'seoul_03', name: '石锅拌饭', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_03.png', tags: ['rice'] },
+    { id: 'seoul_04', name: '韩式炸鸡', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_04.png', tags: ['snack'] },
+    { id: 'seoul_05', name: '海苔卷', category: 'food', rarity: 'core', image: 'images/elements/seoul/seoul_05.png', tags: ['roll'] },
+    { id: 'seoul_06', name: '韩服', category: 'culture', rarity: 'core', image: 'images/elements/seoul/seoul_06.png', tags: ['dress'] },
+    { id: 'seoul_07', name: 'K-pop话筒', category: 'culture', rarity: 'core', image: 'images/elements/seoul/seoul_07.png', tags: ['music'] },
+    { id: 'seoul_08', name: '烧酒瓶', category: 'item', rarity: 'core', image: 'images/elements/seoul/seoul_08.png', tags: ['drink'] },
+    { id: 'seoul_09', name: '太极旗扇', category: 'item', rarity: 'core', image: 'images/elements/seoul/seoul_09.png', tags: ['fan'] },
+    { id: 'seoul_10', name: '银杏', category: 'nature', rarity: 'core', image: 'images/elements/seoul/seoul_10.png', tags: ['leaf'] },
+    { id: 'seoul_11', name: '柿子', category: 'nature', rarity: 'core', image: 'images/elements/seoul/seoul_11.png', tags: ['fruit'] },
+    { id: 'seoul_12', name: '松树', category: 'nature', rarity: 'core', image: 'images/elements/seoul/seoul_12.png', tags: ['tree'] },
   ],
+  levelPresets: createLevelPresets(14000),
   shareCard: {
     titleUnlocked: '我解锁了首尔猫！',
     titlePassport: '首尔护照盖章完成',
   },
 }
+
+export default seoul