chore(v2): 从兴邦预审v2白名单抽取独立可运行基座

按 docs/v2/05-implementation-plan.md §1 候选迁移表与 claude_use/T00 白名单，
从 55e2cdb 抽取 224 个文件（2.48 MB）到独立目录 F:/mini-OpenClaw-v2。

- 排除：凭据(.env/server-deploy.conf/旧DELIVERY.md)、运行数据(xingbang_data 等
  4 个 SQLite)、依赖(venv/node_modules 符号链接)、归档(_backup*/test-evidence/
  ori_file)、Office 临时文件
- 目标目录独立 git 仓库，初始恢复点；Gitea 远程与分支待 OQ-06 Q2 定案
- 未部署、未启动服务、未调用模型

Co-Authored-By: Claude Code <noreply@anthropic.com>

src/lib/chat-stream.ts

@@ -0,0 +1,92 @@
+/** Stateful SSE decoder: TCP chunks are not event boundaries. */
+export interface ChatEvent { event: string; data: Record<string, unknown> }
+
+export class ChatEventDecoder {
+  private buffer = "";
+  private event = "message";
+  private data: string[] = [];
+  push(text: string, flush = false): ChatEvent[] {
+    this.buffer += text;
+    const result: ChatEvent[] = [];
+    const lines = this.buffer.split("\n");
+    this.buffer = lines.pop() || "";
+    if (flush) { if (this.buffer) lines.push(this.buffer); lines.push(""); this.buffer = ""; }
+    for (const raw of lines) {
+      const line = raw.endsWith("\r") ? raw.slice(0, -1) : raw;
+      if (!line) {
+        if (this.data.length) {
+          let parsed: unknown;
+          try { parsed = JSON.parse(this.data.join("\n")); }
+          catch { throw new Error("回答数据格式异常，请重试；已接收的内容会保留。"); }
+          if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) throw new Error("回答事件格式不受支持");
+          result.push({event: this.event, data: parsed as Record<string, unknown>});
+        }
+        this.event = "message"; this.data = [];
+      } else if (line.startsWith("event:")) {
+        this.event = line.slice(6).trim();
+      } else if (line.startsWith("data:")) {
+        this.data.push(line.slice(5).replace(/^ /, ""));
+      }
+    }
+    return result;
+  }
+}
+
+/** No automatic request replay: a tool may already have executed. */
+export async function* readChatStream(url: string, body: unknown, options: {
+  fetcher?: typeof fetch; idleMs?: number; totalMs?: number;
+} = {}): AsyncGenerator<ChatEvent> {
+  const controller = new AbortController();
+  const fetcher = options.fetcher || fetch;
+  const idleMs = options.idleMs ?? 90_000;
+  let timedOut = false, receivedDone = false, receivedError = false, answerSeen = false;
+  let reader: ReadableStreamDefaultReader<Uint8Array> | undefined;
+  const expire = () => { timedOut = true; controller.abort(); };
+  let idle = setTimeout(expire, idleMs);
+  const total = setTimeout(expire, options.totalMs ?? 180_000);
+  const touch = () => { clearTimeout(idle); idle = setTimeout(expire, idleMs); };
+  const decoder = new TextDecoder();
+  const parser = new ChatEventDecoder();
+  const annotate = (events: ChatEvent[]) => {
+    const normalized: ChatEvent[] = [];
+    for (const event of events) {
+      if (event.event === "token" && typeof event.data.content === "string" && event.data.content.trim()) answerSeen = true;
+      if (event.event === "done") {
+        if (!answerSeen) {
+          if (typeof event.data.content !== "string" || !event.data.content.trim()) throw new Error("模型没有返回回答正文，请检查聊天模型配置后重试。");
+          normalized.push({event:"token",data:{content:event.data.content}});
+          answerSeen = true;
+        }
+        receivedDone = true;
+      }
+      if (event.event === "error") receivedError = true;
+      normalized.push(event);
+    }
+    return normalized;
+  };
+  try {
+    const response = await fetcher(url, {method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify(body),signal:controller.signal});
+    if (!response.ok) throw new Error(`聊天服务请求失败（HTTP ${response.status}），请检查当前后端连接。`);
+    if (!response.headers.get("content-type")?.includes("text/event-stream")) throw new Error("聊天服务未返回事件流，请检查后端地址。");
+    reader = response.body?.getReader();
+    if (!reader) throw new Error("聊天服务未返回数据流。");
+    touch();
+    while (true) {
+      const {done,value} = await reader.read();
+      if (done) break;
+      for (const event of annotate(parser.push(decoder.decode(value,{stream:true})))) { touch(); yield event; }
+      if (receivedError) return;
+    }
+    for (const event of annotate(parser.push(decoder.decode(),true))) { touch(); yield event; }
+    if (!receivedDone && !receivedError) throw new Error("回答连接提前中断；已接收的内容已保留，请检查后重试。");
+  } catch (error) {
+    if (timedOut) {
+      if (receivedDone) return; // An optional title request must not invalidate a delivered answer.
+      throw new Error("回答等待超时；请检查模型服务后重试。不会自动重复执行工具。");
+    }
+    throw error;
+  } finally {
+    clearTimeout(idle);clearTimeout(total);controller.abort();
+    if (reader) {try {await reader.cancel();}catch {} reader.releaseLock();}
+  }
+}