diff --git a/code/th_01_base.js b/code/th_01_base.js
index 40e9cc4..a511756 100644
--- a/code/th_01_base.js
+++ b/code/th_01_base.js
@@ -103,7 +103,7 @@ var ConfigValidator = {
     TOOLAPP_BACK_GESTURE_MODE: { type: "enum", values: ["edge", "surface", "off"], default: "surface" },
     TOOLAPP_BACK_EDGE_WIDTH_DP: { type: "int", min: 1, max: 120, default: 72 },
     ENABLE_TOOLAPP_INNER_BACK_STRIPS: { type: "bool", default: false },
-    ENABLE_TOOLAPP_SCREEN_BACK_STRIPS: { type: "bool", default: true },
+    ENABLE_TOOLAPP_SCREEN_BACK_STRIPS: { type: "bool", default: false },
     TOOLAPP_BACK_COMMIT_DISTANCE_DP: { type: "int", min: 1, max: 480, default: 36 },
     TOOLAPP_BACK_SURFACE_SLOP_DP: { type: "int", min: 8, max: 96, default: 24 },
     TOOLAPP_BACK_PROGRESS_DISTANCE_DP: { type: "int", min: 1, max: 720, default: 96 },
@@ -741,7 +741,7 @@ var ConfigManager = {
         TOOLAPP_BACK_GESTURE_MODE: "surface",
         TOOLAPP_BACK_EDGE_WIDTH_DP: 72,
         ENABLE_TOOLAPP_INNER_BACK_STRIPS: false,
-        ENABLE_TOOLAPP_SCREEN_BACK_STRIPS: true,
+        ENABLE_TOOLAPP_SCREEN_BACK_STRIPS: false,
         TOOLAPP_BACK_COMMIT_DISTANCE_DP: 36,
         TOOLAPP_BACK_SURFACE_SLOP_DP: 24,
         TOOLAPP_BACK_PROGRESS_DISTANCE_DP: 96,
@@ -861,7 +861,7 @@ var ConfigManager = {
         ]},
         { key: "TOOLAPP_BACK_EDGE_WIDTH_DP", name: "边缘模式起手宽度", type: "int", min: 1, max: 120, step: 1 },
         { key: "ENABLE_TOOLAPP_INNER_BACK_STRIPS", name: "启用旧版页面覆盖热区(不推荐)", type: "bool" },
-        { key: "ENABLE_TOOLAPP_SCREEN_BACK_STRIPS", name: "启用屏幕空白区返回", type: "bool" },
+        { key: "ENABLE_TOOLAPP_SCREEN_BACK_STRIPS", name: "启用旧版屏幕空白区热区(已禁用)", type: "bool" },
         { key: "TOOLAPP_BACK_COMMIT_DISTANCE_DP", name: "设置页返回触发距离", type: "int", min: 1, max: 480, step: 1 },
         { key: "TOOLAPP_BACK_SURFACE_SLOP_DP", name: "表面横滑起手阈值", type: "int", min: 8, max: 96, step: 1 },
         { key: "TOOLAPP_BACK_PROGRESS_DISTANCE_DP", name: "设置页返回动画距离", type: "int", min: 1, max: 720, step: 1 },
diff --git a/code/th_15_extra.js b/code/th_15_extra.js
index e79626a..e05668d 100644
--- a/code/th_15_extra.js
+++ b/code/th_15_extra.js
@@ -1210,59 +1210,15 @@ FloatBallAppWM.prototype.getToolAppBackEdgeWidthPx = function() {
 };
 
 FloatBallAppWM.prototype.isToolAppScreenBackStripsEnabled = function() {
-  try { return parseBooleanLike(this.config.ENABLE_TOOLAPP_SCREEN_BACK_STRIPS); } catch(e) {}
-  try { return String(this.config.ENABLE_TOOLAPP_SCREEN_BACK_STRIPS || "true") === "true"; } catch(e2) {}
-  return true;
+  // 旧版 WindowManager 透明边缘热区已禁用：它可能抢 ACTION_DOWN，影响按钮、列表、SeekBar、Switch。
+  // 保留函数和清理路径仅为兼容历史状态；正式返回手势由 ToolApp root surface 接管。
+  try { this.hideToolAppScreenBackStrips(); } catch(eHide) {}
+  return false;
 };
 
 FloatBallAppWM.prototype.showToolAppScreenBackStrips = function() {
-  // 只在 ToolApp 面板左右的屏幕空白区创建触摸层；绝不覆盖 ToolApp 矩形内部控件区域。
-  try {
-    this.hideToolAppScreenBackStrips();
-    if (!this.state || !this.state.wm || !this.state.viewerPanelLp) return false;
-    var lp0 = this.state.viewerPanelLp;
-    var sw = Math.max(1, Number(this.state.screen && this.state.screen.w || 0));
-    var sh = Math.max(1, Number(this.state.screen && this.state.screen.h || 0));
-    if (sw <= 1 || sh <= 1) {
-      try { var ss = this.getScreenSizePx(); sw = ss.w; sh = ss.h; } catch(eScreen) {}
-    }
-    var px = Number(lp0.x || 0);
-    var pw = Number(lp0.width || 0);
-    if (isNaN(px)) px = 0;
-    if (isNaN(pw) || pw <= 0) return false;
-    var minBlank = this.dp(3);
-    var leftW = Math.max(0, Math.floor(px));
-    var rightX = Math.floor(px + pw);
-    var rightW = Math.max(0, Math.floor(sw - rightX));
-    var made = false;
-    var arr = [];
-    var addBlankStrip = function(self, edge, x, w) {
-      if (!w || w < minBlank) return false;
-      var strip = self.createToolAppEdgeBackStrip(edge);
-      var flags = android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
-              android.view.WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
-      var lp = new android.view.WindowManager.LayoutParams(
-        w,
-        sh,
-        android.view.WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
-        flags,
-        android.graphics.PixelFormat.TRANSLUCENT
-      );
-      lp.gravity = android.view.Gravity.TOP | android.view.Gravity.START;
-      lp.x = x;
-      lp.y = 0;
-      try { self.state.wm.addView(strip, lp); arr.push(strip); return true; } catch(eAdd) { safeLog(self.L, 'w', 'add blank screen back strip fail edge=' + String(edge) + ' err=' + String(eAdd)); }
-      return false;
-    };
-    if (addBlankStrip(this, 0, 0, leftW)) made = true;
-    if (addBlankStrip(this, 1, rightX, rightW)) made = true;
-    this.state.toolAppScreenBackStrips = arr;
-    try { if (made) safeLog(this.L, 'd', 'blank screen back strips leftW=' + String(leftW) + ' rightW=' + String(rightW) + ' panelX=' + String(px) + ' panelW=' + String(pw)); } catch(eLog) {}
-    return made;
-  } catch(e) {
-    try { this.hideToolAppScreenBackStrips(); } catch(eHide2) {}
-    safeLog(this.L, 'w', "show blank screen back strips fail: " + String(e));
-  }
+  // 旧版 WindowManager 透明边缘热区已禁用；不要再创建额外触摸层。
+  try { this.hideToolAppScreenBackStrips(); } catch(eHide) {}
   return false;
 };
 
diff --git a/manifest.json b/manifest.json
index acf7da0..23acada 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,8 +2,8 @@
   "alg": "SHA256withRSA",
   "files": {
     "th_01_base.js": {
-      "sha256": "12c6645e42cb7dd21da495545e69f64d11c9d6b510aabf0d169edf883b57c4ff",
-      "size": 58140
+      "sha256": "4174459f79dfbc9a79ae5fb148060470586f13c92bc28dbedc77396e0f93dc4b",
+      "size": 58159
     },
     "th_02_core.js": {
       "sha256": "3c5c498d200e961d48fc9ca3f885475e770ecb32b83ec6a89d23df3f88aed1c9",
@@ -58,8 +58,8 @@
       "size": 304993
     },
     "th_15_extra.js": {
-      "sha256": "8ef8f3b48c324426f9f6926e7e4fbee8cea6f15b6e465c1dad6982bbb00c3af3",
-      "size": 130833
+      "sha256": "037d6721289f615a9022994717f09a4cd30e0d09a5fb573d23606220faacd84b",
+      "size": 128762
     },
     "th_16_entry.js": {
       "sha256": "6c59d9891cd010647f84c3db93f1cf95c7bbfb758470ea21044bf72eb8ff73d1",
@@ -68,5 +68,5 @@
   },
   "keyId": "toolhub-targets-2026-rsa3072",
   "schema": 2,
-  "version": 20260522044045
+  "version": 20260522045519
 }
diff --git a/manifest.sig b/manifest.sig
index 96d65eb..c3d7f70 100644
--- a/manifest.sig
+++ b/manifest.sig
@@ -1 +1 @@
-d31WnUYPRd99BgqOnWKrh+xaCDIjlON13cKvM9s+T4xno3g11qoenoFo9rBI4Mcu63R783cIYS9PtfZ8ii1hlaB2DMNqebzGXFTi+9u/Yd56D5pV84Jd/SjL1yN6hTwXT9t/bHrS3E9npyyFVLVeponFagKHecgk/3yEe5GSmLAp1QX0o7ecca2L0rO534rMHa4Ml/dkrsGCwPAfWzuru/xpO8KV0zvQ4leSU7YT+ZxgU4o8L+scvXKDEp3wnaldqqy6ekIhk75m4qmVAPw4dsp+b5CtEcWNfgy6SgvkXz+PawvHOmWz67TQa5G4jCDP7EWynHFcF26U8xuO1x4x4bpNLdzImis/Dg14/HavNID0Yc72+3uJEGHL6RyCyGhic8+mG/25vSkB+brfy8qZK5K8stqZLIC1wJ/0IL0ppkx2LoDTyuwfk+vshzJDmiLBaJCgOuiR24ya3sFeDFD0OWLxbgQiXg1MoYNb1FP69h+i0f2ziea9zja2qEQ8aN81
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