diff --git a/CHANGELOG.md b/CHANGELOG.md
index ffc9794fc6c..d1eeb27cbdb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- macOS/WebChat panel: fix rounded-corner clipping by using panel-specific visual-effect blending and matching corner masking on both effect and hosting layers. (#22458) Thanks @apethree and @agisilaos.
 - macOS/IME input: when marked text is active, treat Return as IME candidate confirmation first in both the voice overlay composer and shared chat composer to prevent accidental sends while composing CJK text. (#25178) Thanks @bottotl.
 - macOS/Voice wake routing: default forwarded voice-wake transcripts to the `webchat` channel (instead of ambiguous `last` routing) so local voice prompts stay pinned to the control chat surface unless explicitly overridden. (#25440) Thanks @chilu18.
 - macOS/Gateway launch: prefer an available `openclaw` binary before pnpm/node runtime fallback when resolving local gateway commands, so local startup no longer fails on hosts with broken runtime discovery. (#25512) Thanks @chilu18.
diff --git a/apps/macos/Sources/OpenClaw/WebChatSwiftUI.swift b/apps/macos/Sources/OpenClaw/WebChatSwiftUI.swift
index 5b866304b09..46e5d80a01e 100644
--- a/apps/macos/Sources/OpenClaw/WebChatSwiftUI.swift
+++ b/apps/macos/Sources/OpenClaw/WebChatSwiftUI.swift
@@ -316,7 +316,12 @@ final class WebChatSwiftUIWindowController {
         let controller = NSViewController()
         let effectView = NSVisualEffectView()
         effectView.material = .sidebar
-        effectView.blendingMode = .behindWindow
+        effectView.blendingMode = switch presentation {
+        case .panel:
+            .withinWindow
+        case .window:
+            .behindWindow
+        }
         effectView.state = .active
         effectView.wantsLayer = true
         effectView.layer?.cornerCurve = .continuous
@@ -328,6 +333,7 @@ final class WebChatSwiftUIWindowController {
         }
         effectView.layer?.cornerRadius = cornerRadius
         effectView.layer?.masksToBounds = true
+        effectView.layer?.backgroundColor = NSColor.clear.cgColor
 
         effectView.translatesAutoresizingMaskIntoConstraints = true
         effectView.autoresizingMask = [.width, .height]
@@ -335,6 +341,9 @@ final class WebChatSwiftUIWindowController {
 
         hosting.view.translatesAutoresizingMaskIntoConstraints = false
         hosting.view.wantsLayer = true
+        hosting.view.layer?.cornerCurve = .continuous
+        hosting.view.layer?.cornerRadius = cornerRadius
+        hosting.view.layer?.masksToBounds = true
         hosting.view.layer?.backgroundColor = NSColor.clear.cgColor
 
         controller.addChild(hosting)