SnowCat 雪猫底层全源码：NapCat 4.18.28 底座 + SnowLuma 能力移植 + V8 通道适配 9.9.37

26 包 monorepo（TS 全源码）：
- snowcat-core: NT 内核 API 封装 + listener（含 9.9.37 六回调适配）+ Packet 发包
- snowcat-onebot: OneBot v11 全动作 + MCP Streamable HTTP 适配器 + 稳定线
- snowcat-webui-frontend/backend: 雪猫控制台（React+HeroUI）
- snowcat-shell: 单文件 bundle 出口（vite inlineDynamicImports）
- snowcat-native: napi2native / MoeHoo / ffmpeg / pty 运行时
- 56 项 SnowLuma 独门动作移植（qzone 全家桶/群相册/装扮/闪照/收藏）
- 工具件: 解包器/启动器/便携制作器/doctor

GitHub 关联已全量指向 DandanLLab/SnowCatQQ

packages/snowcat-common/src/file-uuid.ts

@@ -0,0 +1,121 @@
+import { Peer } from './types';
+import { randomUUID } from 'crypto';
+
+class TimeBasedCache<K, V> {
+  private cache = new Map<K, { value: V, timestamp: number, frequency: number }>();
+  private keyList = new Set<K>();
+  private operationCount = 0;
+
+  constructor (private maxCapacity: number, private ttl: number = 30 * 1000 * 60, private cleanupCount: number = 10) {}
+
+  public put (key: K, value: V): void {
+    const timestamp = Date.now();
+    const cacheEntry = { value, timestamp, frequency: 1 };
+    this.cache.set(key, cacheEntry);
+    this.keyList.add(key);
+    this.operationCount++;
+    if (this.keyList.size > this.maxCapacity) this.evict();
+    if (this.operationCount >= this.cleanupCount) this.cleanup(this.cleanupCount);
+  }
+
+  public get (key: K): V | undefined {
+    const entry = this.cache.get(key);
+    if (entry && Date.now() - entry.timestamp < this.ttl) {
+      entry.timestamp = Date.now();
+      entry.frequency++;
+      this.operationCount++;
+      if (this.operationCount >= this.cleanupCount) this.cleanup(this.cleanupCount);
+      return entry.value;
+    } else {
+      this.deleteKey(key);
+    }
+    return undefined;
+  }
+
+  private cleanup (count: number): void {
+    const currentTime = Date.now();
+    let cleaned = 0;
+    for (const key of this.keyList) {
+      if (cleaned >= count) break;
+      const entry = this.cache.get(key);
+      if (entry && currentTime - entry.timestamp >= this.ttl) {
+        this.deleteKey(key);
+        cleaned++;
+      }
+    }
+    this.operationCount = 0; // 重置操作计数器
+  }
+
+  private deleteKey (key: K): void {
+    this.cache.delete(key);
+    this.keyList.delete(key);
+  }
+
+  private evict (): void {
+    while (this.keyList.size > this.maxCapacity) {
+      let oldestKey: K | undefined;
+      let minFrequency = Infinity;
+      for (const key of this.keyList) {
+        const entry = this.cache.get(key);
+        if (entry && entry.frequency < minFrequency) {
+          minFrequency = entry.frequency;
+          oldestKey = key;
+        }
+      }
+      if (oldestKey !== undefined) this.deleteKey(oldestKey);
+    }
+  }
+}
+
+interface FileUUIDData {
+  peer: Peer;
+  modelId?: string;
+  fileId?: string;
+  msgId?: string;
+  elementId?: string;
+  fileUUID?: string;
+}
+
+class FileUUIDManager {
+  private cache: TimeBasedCache<string, FileUUIDData>;
+
+  constructor (ttl: number) {
+    this.cache = new TimeBasedCache<string, FileUUIDData>(5000, ttl);
+  }
+
+  public encode (data: FileUUIDData, endString: string = '', customUUID?: string): string {
+    const uuid = customUUID || randomUUID().replace(/-/g, '') + endString;
+    this.cache.put(uuid, data);
+    return uuid;
+  }
+
+  public decode (uuid: string): FileUUIDData | undefined {
+    return this.cache.get(uuid);
+  }
+}
+
+export class FileNapCatOneBotUUIDWrap {
+  private manager: FileUUIDManager;
+
+  constructor (ttl: number = 86400000) {
+    this.manager = new FileUUIDManager(ttl);
+  }
+
+  public encodeModelId (peer: Peer, modelId: string, fileId: string, fileUUID: string = '', endString: string = '', customUUID?: string): string {
+    return this.manager.encode({ peer, modelId, fileId, fileUUID }, endString, customUUID);
+  }
+
+  public decodeModelId (uuid: string): FileUUIDData | undefined {
+    return this.manager.decode(uuid);
+  }
+
+  public encode (peer: Peer, msgId: string, elementId: string, fileUUID: string = '', customUUID?: string): string {
+    return this.manager.encode({ peer, msgId, elementId, fileUUID }, '', customUUID);
+  }
+
+  public decode (uuid: string): FileUUIDData | undefined {
+    return this.manager.decode(uuid);
+  }
+}
+
+export const FileNapCatOneBotUUID = new FileNapCatOneBotUUIDWrap();