diff --git a/SurveyController.xcodeproj/project.pbxproj b/SurveyController.xcodeproj/project.pbxproj
index 1c84a26..cfa5fc8 100644
--- a/SurveyController.xcodeproj/project.pbxproj
+++ b/SurveyController.xcodeproj/project.pbxproj
@@ -317,7 +317,7 @@
 				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 10101;
+				CURRENT_PROJECT_VERSION = 10102;
 				DEAD_CODE_STRIPPING = YES;
 				ENABLE_APP_SANDBOX = NO;
 				ENABLE_PREVIEWS = YES;
@@ -331,7 +331,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 0.1.1;
+				MARKETING_VERSION = 0.1.2;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.surveycontroller.mac";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -346,7 +346,7 @@
 				CODE_SIGN_IDENTITY = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 10101;
+				CURRENT_PROJECT_VERSION = 10102;
 				DEAD_CODE_STRIPPING = YES;
 				ENABLE_APP_SANDBOX = NO;
 				ENABLE_PREVIEWS = NO;
@@ -360,7 +360,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 0.1.1;
+				MARKETING_VERSION = 0.1.2;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.surveycontroller.mac";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -373,9 +373,9 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 10101;
+				CURRENT_PROJECT_VERSION = 10102;
 				GENERATE_INFOPLIST_FILE = YES;
-				MARKETING_VERSION = 0.1.1;
+				MARKETING_VERSION = 0.1.2;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.surveycontroller.mac.tests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = NO;
@@ -389,9 +389,9 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 10101;
+				CURRENT_PROJECT_VERSION = 10102;
 				GENERATE_INFOPLIST_FILE = YES;
-				MARKETING_VERSION = 0.1.1;
+				MARKETING_VERSION = 0.1.2;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.surveycontroller.mac.tests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = NO;
diff --git a/SurveyController/App/AppVersion.swift b/SurveyController/App/AppVersion.swift
index 84dc84f..9b9970c 100644
--- a/SurveyController/App/AppVersion.swift
+++ b/SurveyController/App/AppVersion.swift
@@ -6,7 +6,7 @@ import Foundation
 /// 应用版本与 GitHub 仓库信息。
 public enum AppVersion {
     /// 当前版本（与 MARKETING_VERSION 同步）。
-    public static let version = "0.1.1"
+    public static let version = "0.1.2"
     /// 当前对齐的官方桌面端版本。
     public static let alignedOfficialVersion = "4.0.6"
 
diff --git a/SurveyController/Core/Proxy/ProxyPool.swift b/SurveyController/Core/Proxy/ProxyPool.swift
index d37a9b3..1258f9b 100644
--- a/SurveyController/Core/Proxy/ProxyPool.swift
+++ b/SurveyController/Core/Proxy/ProxyPool.swift
@@ -47,7 +47,7 @@ public struct OfficialProxyProvider: ProxyProvider {
             leases.append(ProxyLease(
                 address: proxy.address,
                 expireAt: expireAt,
-                ttlSufficient: expireAt <= 0 || expireAt - Date().timeIntervalSince1970 > 60
+                ttlSufficient: expireAt <= 0 || expireAt - Date().timeIntervalSince1970 >= ProxyPool.minTtlSeconds
             ))
         }
         return leases
@@ -134,7 +134,9 @@ public struct CustomProxyProvider: ProxyProvider {
 /// 对标 session_policy 的代理池（actor 保证并发安全，替代 Python 锁）。
 public actor ProxyPool {
     public static let cooldownSeconds: TimeInterval = 45
-    public static let minTtlSeconds: TimeInterval = 60
+    /// 纯 HTTP 链路不设置预留时长门槛；仍由 expireAt 判断代理是否已经过期。
+    /// 对标 HTTP_PROXY_MIN_REMAINING_TTL_SECONDS（官方 aca7b90，#103）。
+    public static let minTtlSeconds: TimeInterval = 0
 
     private var available: [ProxyLease] = []
     private var inUse: Set<String> = []
@@ -203,8 +205,9 @@ public actor ProxyPool {
         if inUse.contains(lease.address) || blocked.contains(lease.address) { return false }
         if let until = cooldowns[lease.address], until > Date() { return false }
         if lease.expireAt > 0 {
-            if Date().timeIntervalSince1970 >= lease.expireAt { return false }
-            if lease.expireAt - Date().timeIntervalSince1970 < Self.minTtlSeconds { return false }
+            // 对标 proxy_lease_has_sufficient_ttl：剩余时长 >= 门槛才可用。门槛为 0 时，未过期即保留。
+            let remaining = lease.expireAt - Date().timeIntervalSince1970
+            if remaining < Self.minTtlSeconds { return false }
         }
         return true
     }
diff --git a/SurveyControllerTests/RunEngineTests.swift b/SurveyControllerTests/RunEngineTests.swift
index 01e2ce7..9f1fb34 100644
--- a/SurveyControllerTests/RunEngineTests.swift
+++ b/SurveyControllerTests/RunEngineTests.swift
@@ -63,6 +63,20 @@ final class ProxyPoolTests: XCTestCase {
         XCTAssertEqual(lease.address, "5.5.5.5:80")
     }
 
+    /// 对标 test_merge_prefetched_proxy_leases_keeps_future_proxy_without_ttl_floor：
+    /// 已提取、尚未过期的代理必须使用，不能因客户端预留时长被丢弃。
+    func test_future_lease_is_kept_without_ttl_floor() async throws {
+        XCTAssertEqual(ProxyPool.minTtlSeconds, 0)
+        let now = Date().timeIntervalSince1970
+        let provider = ScriptedProxyProvider(batches: [[
+            ProxyLease(address: "1.1.1.1:8000", expireAt: now + 5),
+            ProxyLease(address: "2.2.2.2:8000", expireAt: now - 1),
+        ]])
+        let pool = ProxyPool(provider: provider)
+        let lease = try await pool.acquire()
+        XCTAssertEqual(lease.address, "1.1.1.1:8000")
+    }
+
     func test_empty_provider_raises_unavailable() async {
         let pool = ProxyPool(provider: ScriptedProxyProvider(batches: []))
         do {