feat(qs): 汽水音乐平台接入——匿名搜索/试听、抖音扫码登录、解密流代理

- sdk/qs 平台模块(安卓参数指纹匿名搜索)+ sdk/apis/qs 取流:
  匿名 30s 试听,登录态走签名 track_v2 + spade key AES-CTR 解密
- /login/qs/qr 抖音扫码登录(授权后 sessionid 解锁完整曲目)
- /stream/qs/:id 解密流代理,/url 返回的相对地址按请求 host 补全
- 回归测试覆盖 kw 双通道(VIP 真音频/降级链)与 qs 试听;start.bat 去掉
  SOURCE_ENABLED 直启

sdk/qs/crypto/sign.ts

@@ -0,0 +1,56 @@
+import { hash } from "./index.ts";
+import { getArgus } from "./argus.ts";
+import { getLadon } from "./ladon.ts";
+import { defaultUnidbgConfig, type UnidbgConfig } from "./unidbgconfig.ts";
+
+export interface UnidbgHeaders extends Record<string, string> {
+    "x-argus": string;
+    "x-ladon": string;
+    "x-khronos": string;
+}
+
+export default async function generateHeaders(
+    rawQuery: string,
+    xssStub = "",
+    timestamp: number = Math.floor(Date.now() / 1000),
+    config: UnidbgConfig = defaultUnidbgConfig,
+): Promise<UnidbgHeaders> {
+    const [argus, ladon] = await Promise.all([
+        getArgus(rawQuery, xssStub, timestamp, config),
+        getLadon(timestamp, config),
+    ]);
+
+    return {
+        "x-argus": argus,
+        "x-ladon": ladon,
+        "x-khronos": String(timestamp),
+    };
+}
+
+export async function signRequest(
+    url: string,
+    body?: ArrayBuffer | Uint8Array<ArrayBuffer> | string,
+    config: UnidbgConfig = defaultUnidbgConfig,
+): Promise<Record<string, string>> {
+    const rawQuery = new URL(url).search.replace(/^\?/, "");
+
+    const hasBody = typeof body === "string" ? body.length > 0 : (body?.byteLength ?? 0) > 0;
+    const xssStub = hasBody ? await hash.md5(body!) : "";
+
+    const now = Date.now();
+    const headers: Record<string, string> = await generateHeaders(
+        rawQuery,
+        xssStub,
+        Math.floor(now / 1000),
+        config,
+    );
+    headers["x-ss-req-ticket"] = String(now);
+    if (hasBody) {
+        headers["X-SS-STUB"] = xssStub;
+    }
+    return headers;
+}
+
+export { getArgus } from "./argus.ts";
+export { getLadon } from "./ladon.ts";
+export { defaultUnidbgConfig, type UnidbgConfig } from "./unidbgconfig.ts";