diff --git a/code/th_01_base.js b/code/th_01_base.js
index f81945f..cc78faa 100644
--- a/code/th_01_base.js
+++ b/code/th_01_base.js
@@ -844,7 +844,7 @@ var ConfigManager = {
 
         { type: "section", name: "触摸与手势" },
         { key: "CLICK_SLOP_DP", name: "点击位移阈值(dp)", type: "int", min: 1, max: 40, step: 1 },
-        { key: "TOOLAPP_BACK_EDGE_WIDTH_DP", name: "设置页返回边界宽度", type: "int", min: 1, max: 120, step: 1 },
+        { key: "TOOLAPP_BACK_EDGE_WIDTH_DP", name: "页面内返回边界宽度", type: "int", min: 1, max: 120, step: 1 },
         { 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_PROGRESS_DISTANCE_DP", name: "设置页返回动画距离", type: "int", min: 1, max: 720, step: 1 },
         { key: "ENABLE_LONG_PRESS", name: "启用长按", type: "bool" },
diff --git a/code/th_05_persistence.js b/code/th_05_persistence.js
index 1705370..f43ebde 100644
--- a/code/th_05_persistence.js
+++ b/code/th_05_persistence.js
@@ -321,9 +321,8 @@ FloatBallAppWM.prototype.applyImmediateEffectsForKey = function(k) {
 
     if (k === "TOOLAPP_BACK_EDGE_WIDTH_DP") {
       try {
-        if (this.state.toolAppActive && this.hideToolAppScreenBackStrips && this.showToolAppScreenBackStrips) {
-          this.hideToolAppScreenBackStrips();
-          this.showToolAppScreenBackStrips();
+        if (this.state.toolAppActive && this.updateToolAppInnerBackEdgeWidth) {
+          this.updateToolAppInnerBackEdgeWidth();
         }
       } catch(eBackStrip) {
         safeLog(this.L, "w", "apply back edge width fail: " + String(eBackStrip));
diff --git a/code/th_15_extra.js b/code/th_15_extra.js
index 9baac15..25e5a28 100644
--- a/code/th_15_extra.js
+++ b/code/th_15_extra.js
@@ -830,6 +830,19 @@ FloatBallAppWM.prototype.hideToolAppScreenBackStrips = function() {
   } catch (e) { safeLog(this.L, 'w', "hide tool app screen back strips fail: " + String(e)); }
 };
 
+FloatBallAppWM.prototype.getToolAppBackEdgeWidthPx = function() {
+  var stripDp = 48;
+  try {
+    stripDp = Number(this.config.TOOLAPP_BACK_EDGE_WIDTH_DP || 48);
+    if (isNaN(stripDp)) stripDp = 48;
+    if (stripDp < 1) stripDp = 1;
+    if (stripDp > 120) stripDp = 120;
+  } catch(e) {
+    stripDp = 48;
+  }
+  return this.dp(stripDp);
+};
+
 FloatBallAppWM.prototype.showToolAppScreenBackStrips = function() {
   try {
     if (!this.state.wm || !this.state.toolAppActive) return false;
@@ -961,7 +974,7 @@ FloatBallAppWM.prototype.buildToolAppShell = function(contentView, title, canBac
   body.addView(host, hostLp);
 
   try {
-    var stripW = this.dp(48);
+    var stripW = this.getToolAppBackEdgeWidthPx ? this.getToolAppBackEdgeWidthPx() : this.dp(48);
     var leftStrip = this.createToolAppEdgeBackStrip(0);
     var leftLp = new android.widget.FrameLayout.LayoutParams(stripW, -1);
     leftLp.gravity = android.view.Gravity.START | android.view.Gravity.TOP;
@@ -970,6 +983,8 @@ FloatBallAppWM.prototype.buildToolAppShell = function(contentView, title, canBac
     var rightLp = new android.widget.FrameLayout.LayoutParams(stripW, -1);
     rightLp.gravity = android.view.Gravity.END | android.view.Gravity.TOP;
     root.addView(rightStrip, rightLp);
+    this.state.toolAppInnerBackLeftStrip = leftStrip;
+    this.state.toolAppInnerBackRightStrip = rightStrip;
   } catch (eStrip) { safeLog(this.L, 'w', "add edge back strip fail: " + String(eStrip)); }
 
   this.state.toolAppRoot = root;
@@ -982,6 +997,36 @@ FloatBallAppWM.prototype.buildToolAppShell = function(contentView, title, canBac
   return root;
 };
 
+FloatBallAppWM.prototype.updateToolAppInnerBackEdgeWidth = function() {
+  try {
+    var w = this.getToolAppBackEdgeWidthPx ? this.getToolAppBackEdgeWidthPx() : this.dp(48);
+
+    var left = this.state.toolAppInnerBackLeftStrip;
+    var right = this.state.toolAppInnerBackRightStrip;
+
+    if (left) {
+      var lpL = left.getLayoutParams();
+      if (lpL) {
+        lpL.width = w;
+        left.setLayoutParams(lpL);
+      }
+    }
+
+    if (right) {
+      var lpR = right.getLayoutParams();
+      if (lpR) {
+        lpR.width = w;
+        right.setLayoutParams(lpR);
+      }
+    }
+
+    return true;
+  } catch(e) {
+    safeLog(this.L, "w", "update inner back edge width fail: " + String(e));
+  }
+  return false;
+};
+
 FloatBallAppWM.prototype.ensureToolAppShell = function() {
   try {
     if (this.state.toolAppRoot && this.state.toolAppContentHost) return this.state.toolAppRoot;
diff --git a/manifest.json b/manifest.json
index 602c819..3fa3fa3 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
   "alg": "SHA256withRSA",
   "files": {
     "th_01_base.js": {
-      "sha256": "6066fdd266c85adb6b2ca2168845fb4618f952256fcc3aeb1f133160b505fa15",
+      "sha256": "ea06cb734ad4ccdcec06d746771f6e3c71154d1acf02192edd2b9664109a8e31",
       "size": 55958
     },
     "th_02_core.js": {
@@ -18,8 +18,8 @@
       "size": 40227
     },
     "th_05_persistence.js": {
-      "sha256": "a8b8e8e34600c70c710f906c832e9ca48c609f2257700b43b313753ce0603b49",
-      "size": 15231
+      "sha256": "7d913b2caddf04c41ca13023c06763c03a7e372bb31080af37e7a3b2aa81d5f8",
+      "size": 15157
     },
     "th_06_icon_parser.js": {
       "sha256": "25b95a5df634a7ee359f3ab798e4d3154a71c24016f7b4bf8a658096644b2484",
@@ -58,8 +58,8 @@
       "size": 262019
     },
     "th_15_extra.js": {
-      "sha256": "b927a12da2a2c71099ca166d838cf982a4c0420ce47301ec5fa3da58047a5c97",
-      "size": 96064
+      "sha256": "bf28b503ea5e2f023952016a57a421ecc8f8ff57844f39571f01ca18ebbcdad4",
+      "size": 97293
     },
     "th_16_entry.js": {
       "sha256": "e7c99c3dfbd6aedab05551426955081ae6cae034754f2f557cefa01dc75dc001",
@@ -68,5 +68,5 @@
   },
   "keyId": "toolhub-targets-2026-rsa3072",
   "schema": 2,
-  "version": 20260518164547
+  "version": 20260518170217
 }
diff --git a/manifest.sig b/manifest.sig
index 0eb5fb1..edfe603 100644
--- a/manifest.sig
+++ b/manifest.sig
@@ -1 +1 @@
-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