[client] Drop Mesa3D opengl32.dll, bootstrap WebView2 in Windows installers

Wails3 uses the WebKit-style WebView2 runtime instead of Fyne's OpenGL
backend, so the Mesa3D opengl32.dll payload that the Fyne build needed
for RDP/VM rendering can leave the .exe and .msi installers. Add a
WebView2 bootstrap step that probes the EdgeUpdate registry markers
(both HKLM\WOW6432Node and HKCU) and silently runs
MicrosoftEdgeWebview2Setup.exe only if the runtime is missing.

NSIS uses an inline macro adapted from Wails3's wails_tools.nsh; WiX
uses a deferred CustomAction gated on RegistrySearch properties. Both
expect the bootstrapper payload at client/MicrosoftEdgeWebview2Setup.exe,
which the sign-pipelines build step generates with `wails3 generate
webview2bootstrapper`. The matching sign-pipelines change lives in
that repo's PR.

The uninstall section keeps an unconditional `Delete opengl32.dll` so
upgrades from older Fyne builds clean up the leftover file.

client/installer.nsis

@@ -270,6 +270,43 @@ CreateShortCut "$SMPROGRAMS\${APP_NAME}.lnk" "$INSTDIR\${UI_APP_EXE}"
 CreateShortCut "$DESKTOP\${APP_NAME}.lnk" "$INSTDIR\${UI_APP_EXE}"
 SectionEnd
 
+# Install the Microsoft Edge WebView2 runtime if it isn't already present.
+# Macro adapted from Wails3's NSIS template (wails_tools.nsh): a registry
+# probe followed by a silent install of the embedded evergreen bootstrapper.
+# The MicrosoftEdgeWebview2Setup.exe payload is staged next to this script
+# by the sign-pipelines build step (`wails3 generate webview2bootstrapper`).
+!macro nb.webview2runtime
+    SetRegView 64
+    # Per-machine install marker — populated when the runtime ships with
+    # Edge or has been installed by an admin previously.
+    ReadRegStr $0 HKLM "SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}" "pv"
+    ${If} $0 != ""
+        Goto webview2_ok
+    ${EndIf}
+    # Per-user fallback for HKCU installs.
+    ReadRegStr $0 HKCU "Software\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}" "pv"
+    ${If} $0 != ""
+        Goto webview2_ok
+    ${EndIf}
+
+    SetDetailsPrint both
+    DetailPrint "Installing: WebView2 Runtime"
+    SetDetailsPrint listonly
+
+    InitPluginsDir
+    CreateDirectory "$pluginsdir\webview2bootstrapper"
+    SetOutPath "$pluginsdir\webview2bootstrapper"
+    File "MicrosoftEdgeWebview2Setup.exe"
+    ExecWait '"$pluginsdir\webview2bootstrapper\MicrosoftEdgeWebview2Setup.exe" /silent /install'
+
+    SetDetailsPrint both
+    webview2_ok:
+!macroend
+
+Section -WebView2
+    !insertmacro nb.webview2runtime
+SectionEnd
+
 Section -Post
 ExecWait '"$INSTDIR\${MAIN_APP_EXE}" service install'
 ExecWait '"$INSTDIR\${MAIN_APP_EXE}" service start'
@@ -316,9 +353,9 @@ DetailPrint "Deleting application files..."
 Delete "$INSTDIR\${UI_APP_EXE}"
 Delete "$INSTDIR\${MAIN_APP_EXE}"
 Delete "$INSTDIR\wintun.dll"
-!if ${ARCH} == "amd64"
+# Legacy: pre-Wails installs shipped opengl32.dll (Mesa3D for Fyne); remove
+# any leftover copy on uninstall so old upgrades don't leave it behind.
 Delete "$INSTDIR\opengl32.dll"
-!endif
 DetailPrint "Removing application directory..."
 RmDir /r "$INSTDIR"
 

client/netbird.wxs

@@ -29,9 +29,6 @@
 					</File>
 					<File ProcessorArchitecture="$(var.ProcessorArchitecture)" Source=".\dist\netbird_windows_$(var.ArchSuffix)\wintun.dll" />
 					<File Id="NetbirdToastIcon" Name="netbird.png" Source=".\client\ui\assets\netbird.png" />
-					<?if $(var.ArchSuffix) = "amd64" ?>
-					<File ProcessorArchitecture="$(var.ProcessorArchitecture)" Source=".\dist\netbird_windows_$(var.ArchSuffix)\opengl32.dll" />
-					<?endif ?>
 
 					<ServiceInstall
                                      Id="NetBirdService"
@@ -71,7 +68,37 @@
 		<util:CloseApplication Id="CloseNetBird" CloseMessage="no" Target="netbird.exe" RebootPrompt="no" />
 		<util:CloseApplication Id="CloseNetBirdUI" CloseMessage="no" Target="netbird-ui.exe" RebootPrompt="no" TerminateProcess="0" />
 
+		<!-- WebView2 evergreen runtime detection.
+		     Probe both the per-machine and per-user EdgeUpdate keys; if either
+		     reports a non-empty `pv` value the runtime is already installed
+		     and we skip the bootstrapper. -->
+		<Property Id="WEBVIEW2_VERSION_HKLM">
+			<RegistrySearch Id="WV2HKLM" Root="HKLM"
+				Key="SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}"
+				Name="pv" Type="raw" Bitness="always64" />
+		</Property>
+		<Property Id="WEBVIEW2_VERSION_HKCU">
+			<RegistrySearch Id="WV2HKCU" Root="HKCU"
+				Key="Software\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}"
+				Name="pv" Type="raw" />
+		</Property>
 
+		<!-- Embed the bootstrapper payload. Path is relative to the WiX
+		     working directory; sign-pipelines stages it next to client/
+		     via `wails3 generate webview2bootstrapper`. -->
+		<Binary Id="WebView2Bootstrapper" SourceFile=".\client\MicrosoftEdgeWebview2Setup.exe" />
+
+		<CustomAction Id="InstallWebView2"
+			BinaryRef="WebView2Bootstrapper"
+			ExeCommand="/silent /install"
+			Execute="deferred"
+			Impersonate="no"
+			Return="check" />
+
+		<InstallExecuteSequence>
+			<Custom Action="InstallWebView2" Before="InstallFinalize"
+				Condition="NOT WEBVIEW2_VERSION_HKLM AND NOT WEBVIEW2_VERSION_HKCU AND NOT REMOVE" />
+		</InstallExecuteSequence>
 
 		<!-- Icons -->
 		<Icon Id="NetbirdIcon" SourceFile=".\client\ui\assets\netbird.ico" />