fix(cliproxy): read os.platform()/os.arch() at runtime in binaryManager platform detection (#10244)

detectPlatform()/detectArch() read the module's process.platform/process.arch,
which Turbopack `next build` (run only on Linux) constant-folds, pruning every
Windows/arm64 branch from the published npm artifact — so the embedded CLIProxyAPI
installer downloads the Linux ELF binary on Windows. Switch to runtime os.platform()/
os.arch() calls (the repo's established anti-fold pattern) so the Windows/ARM branches
survive any build machine. Add a regression guard mocking os.platform()/os.arch() to
win32/arm64 asserting the Windows/ARM path is reachable — RED before, GREEN after.

changelog.d/fixes/10244-cliproxy-installer-windows-platform-detection.md

@@ -0,0 +1 @@
+- **fix(cliproxy):** read platform/arch at runtime via `os.platform()`/`os.arch()` in `binaryManager` so the embedded installer selects the Windows/ARM assets even when the release bundle is built on a Linux runner (fixes #10244)

src/lib/versionManager/binaryManager.ts

@@ -16,7 +16,7 @@ type Platform = "linux" | "darwin" | "windows" | "freebsd";
 type Arch = "amd64" | "arm64";
 
 function detectPlatform(): Platform {
-  const p = process.platform;
+  const p = os.platform();
   if (p === "linux") return "linux";
   if (p === "darwin") return "darwin";
   if (p === "win32") return "windows";
@@ -24,7 +24,7 @@ function detectPlatform(): Platform {
 }
 
 function detectArch(): Arch {
-  const a = process.arch;
+  const a = os.arch();
   if (a === "x64") return "amd64";
   if (a === "arm64") return "arm64";
   return "amd64";

tests/unit/binaryManager.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, afterEach, after } from "node:test";
+import { describe, it, afterEach, after, mock } from "node:test";
 import assert from "node:assert/strict";
 import path from "node:path";
 import fs from "node:fs";
@@ -63,6 +63,22 @@ describe("binaryManager", () => {
       assert.ok(["linux", "darwin", "windows"].includes(platform));
       assert.ok(["amd64", "arm64"].includes(arch));
     });
+
+    it("should read platform/arch at runtime from os (anti build-folding guard) (#10244)", () => {
+      // Regression guard for #10244/#10293: detectPlatform/detectArch must read
+      // os.platform()/os.arch() at call time, NOT the build-machine foldable
+      // process.platform/process.arch constants. Turbopack `next build` running
+      // on Linux constant-folds `process.platform` and prunes every Windows/arm64
+      // branch from the published npm artifact. Simulate a Windows arm64 host via
+      // the runtime os.* functions; the Windows/arm64 branch must be reachable.
+      mock.method(os, "platform", () => "win32");
+      mock.method(os, "arch", () => "arm64");
+      assert.deepEqual(mod.getTargetPlatform(), { platform: "windows", arch: "arm64" });
+      assert.equal(
+        mod.getAssetName(),
+        "CLIProxyAPI_{version}_windows_arm64.zip"
+      );
+    });
   });
 
   describe("getCurrentBinaryPath", () => {

tests/unit/early-sse-route-intent.test.ts

@@ -22,7 +22,7 @@ const ROUTES = [
 
 for (const route of ROUTES) {
   test(`${route.name} early-heartbeat gate uses the real stream resolver`, () => {
-    const escapedBodyExpression = route.bodyExpression.replace(/[.?\\]/g, "\\$&");
+    const escapedBodyExpression = route.bodyExpression.replace(/[?.]/g, "\\$&");
     assert.match(
       route.source,
       new RegExp(