Refactor server-rs runtime and update related docs

src/hooks/useGameFlow.customWorld.test.tsx

@@ -213,14 +213,12 @@ function buildSavedProfile() {
     camp: {
       name: '回潮暂栖所',
       description: '能暂时收拢队伍、整理灯册与潮路线索的落脚点。',
-      dangerLevel: 'low',
     },
     landmarks: [
       {
         id: 'landmark-1',
         name: '回潮旧灯塔',
         description: '被海雾啃旧的石塔仍在夜里维持着微弱灯火。',
-        dangerLevel: 'high',
         sceneNpcIds: ['story-1'],
         connections: [
           {
@@ -243,7 +241,6 @@ function buildSavedProfile() {
         id: 'landmark-2',
         name: '雾栈尽头',
         description: '旧栈桥尽头只剩断索、潮板和被抹掉的船名。',
-        dangerLevel: 'high',
         sceneNpcIds: [],
         connections: [
           {