feat(agent): omit sslocal log timestamps

ShadowsocksX-NG2/Agent/AgentContract.swift

@@ -83,7 +83,7 @@ func spawnSslocal() -> Process? {
     if data.isEmpty { handle.readabilityHandler = nil }
   }
   child.executableURL = sslocalURL
-  child.arguments = ["-c", contractURL.path]
+  child.arguments = ["-c", contractURL.path, "--log-without-time"]
   var childEnvironment = environment
   // 不配置 sslocal 日志级别；未设置时使用上游默认值，显式外部 RUST_LOG 原样透传。
   // macOS 的 resolv.conf 可能含带 zone id 的链路本地 nameserver（RA 下发的

ShadowsocksX-NG2/Tests/Agent/AgentLifecycleTests.swift

@@ -171,10 +171,13 @@ final class AgentLifecycleCoreTests: AgentLifecycleTests {
   func testStartProtocolSpawnsSslocalWithAbsoluteConfigPathThenStopsOnSIGTERM() throws {
     try writeContract(ProxyRuntimeFixture.makeDocument())
     let wrapper = try launchWrapper(behavior: "run")
+    let expectedInvocation = "invoked: -c \(contractURL.path) --log-without-time"
 
     XCTAssertTrue(
-      try waitUntil { self.stateLog().contains("invoked: -c \(self.contractURL.path)") },
-      "wrapper 应以契约绝对路径调用 sslocal，实际：\(stateLog())")
+      try waitUntil {
+        self.stateLog().components(separatedBy: .newlines).contains(expectedInvocation)
+      },
+      "wrapper 应以契约绝对路径及无上游时间参数调用 sslocal，实际：\(stateLog())")
     XCTAssertTrue(pidAlive(wrapper.processIdentifier), "sslocal 运行期间 wrapper 应保持常驻")
 
     XCTAssertThrowsError(try waitForExit(wrapper, timeout: 0.01))