feat(windows): reinstall an existing Service during NSIS upgrades

The reinstall page runs the previous uninstaller, which removes the
Service, and the new installer only tried to start one. Record whether
clash_verge_service exists, with its start type and running state, in
.onInit before that uninstaller can run. When it existed, Section Install
reinstalls it with the bundled cores and their hashes through the
installer's own elevation, then restores a non-automatic start type and
the stopped state. A first install still never adds a Service.

A failed reinstall or restore is logged, shown in a warning dialog that is
auto-confirmed under /S, and sets exit code 2, so the installer does not
report success.

Validated only by compiling the macros with makensis -WX against the real
SimpleSC plugin; not run on Windows.

Refs #8553

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Changelog.md

@@ -48,6 +48,10 @@
 - 优化连接、规则和日志筛选：切换页面后保留过滤条件
 - 优化全局模式代理列表：仅显示 `GLOBAL` 节点，选中其中的策略组时才显示该组
 
+**🖥️ Windows**
+
+- 优化 Windows 升级安装时自动重装已安装的服务并保留启停设置，重装失败时提示
+
 **🍎 macOS**
 
 - 优化 macOS TUN 模式的系统 DNS，增加阿里和 Cloudflare 地址

src-tauri/packages/windows/installer.nsi

@@ -77,6 +77,9 @@ Var VC_REDIST_URL
 Var VC_REDIST_EXE
 Var VC_RUNTIME_READY
 Var VC_RUNTIME_NEEDED
+Var ServiceExisted
+Var ServiceStartType
+Var ServiceWasRunning
 
 Name "${PRODUCTNAME}"
 BrandingText "${COPYRIGHT}"
@@ -466,6 +469,34 @@ FunctionEnd
 {{#each language_files}}
   !include "{{this}}"
 {{/each}}
+!ifdef LANG_ENGLISH
+  LangString serviceReinstallFailed ${LANG_ENGLISH} "The ${PRODUCTNAME} Service could not be reinstalled (code $0). Open ${PRODUCTNAME} and reinstall the Service to restore Service mode."
+!endif
+!ifdef LANG_SIMPCHINESE
+  LangString serviceReinstallFailed ${LANG_SIMPCHINESE} "${PRODUCTNAME} 服务重装失败（代码 $0）。请打开 ${PRODUCTNAME} 重新安装服务以恢复服务模式。"
+!endif
+!ifdef LANG_RUSSIAN
+  LangString serviceReinstallFailed ${LANG_RUSSIAN} "Не удалось переустановить службу ${PRODUCTNAME} (код $0). Откройте ${PRODUCTNAME} и переустановите службу, чтобы восстановить режим службы."
+!endif
+
+!macro RecordVergeService
+  StrCpy $ServiceExisted 0
+  StrCpy $ServiceStartType ""
+  StrCpy $ServiceWasRunning 1
+  SimpleSC::ExistsService "clash_verge_service"
+  Pop $0
+  ${If} $0 == 0
+    StrCpy $ServiceExisted 1
+    SimpleSC::GetServiceStartType "clash_verge_service"
+    Pop $0
+    Pop $1
+    ${IfThen} $0 == 0 ${|} StrCpy $ServiceStartType $1 ${|}
+    SimpleSC::ServiceIsRunning "clash_verge_service"
+    Pop $0
+    Pop $1
+    ${IfThen} $0 == 0 ${|} StrCpy $ServiceWasRunning $1 ${|}
+  ${EndIf}
+!macroend
 
 Function .onInit
   ${GetOptions} $CMDLINE "/P" $PassiveMode
@@ -483,6 +514,9 @@ Function .onInit
     StrCpy $UpdateMode 1
   ${EndIf}
 
+  ; Recorded before the reinstall page can run the previous uninstaller, which removes the Service.
+  !insertmacro RecordVergeService
+
   !if "${DISPLAYLANGUAGESELECTOR}" == "true"
     ; Auto-update forwards the app's UI language as `/LANG=<NSIS-lang-id>` so
     ; the installer uses it directly and skips the interactive language
@@ -663,6 +697,36 @@ FunctionEnd
   ${EndIf}
 !macroend
 
+; Reinstalls the Service with the bundled cores, then restores the recorded start type and stopped state.
+!macro ReinstallVergeService
+  StrCpy $R0 '"$INSTDIR\resources\clash-verge-service-install.exe" --install-service'
+  !ifdef MIHOMO_SHA256
+    StrCpy $R0 '$R0 --install-core "$INSTDIR\verge-mihomo.exe" --sha256 "${MIHOMO_SHA256}"'
+  !endif
+  !ifdef MIHOMO_ALPHA_SHA256
+    StrCpy $R0 '$R0 --install-core "$INSTDIR\verge-mihomo-alpha.exe" --sha256 "${MIHOMO_ALPHA_SHA256}"'
+  !endif
+  DetailPrint "Reinstalling ${PRODUCTNAME} Service..."
+  nsExec::ExecToLog $R0
+  Pop $0
+  ${If} $0 == 0
+  ${AndIf} $ServiceStartType != ""
+  ${AndIf} $ServiceStartType != 2
+    SimpleSC::SetServiceStartType "clash_verge_service" $ServiceStartType
+    Pop $0
+  ${EndIf}
+  ${If} $0 == 0
+  ${AndIf} $ServiceWasRunning == 0
+    SimpleSC::StopService "clash_verge_service" 1 30
+    Pop $0
+  ${EndIf}
+  ${If} $0 != 0
+    DetailPrint "Reinstalling ${PRODUCTNAME} Service failed ($0)"
+    MessageBox MB_OK|MB_ICONEXCLAMATION "$(serviceReinstallFailed)" /SD IDOK
+    SetErrorLevel 2
+  ${EndIf}
+!macroend
+
 !macro RemoveVergeService
   ; Check if the service exists
   SimpleSC::ExistsService "clash_verge_service"
@@ -985,7 +1049,11 @@ Section Install
     ${IfThen} $0 != 0 ${|} DetailPrint "Staging verge-mihomo-alpha returned $0" ${|}
   !endif
 
-  !insertmacro StartVergeService
+  ${If} $ServiceExisted = 1
+    !insertmacro ReinstallVergeService
+  ${Else}
+    !insertmacro StartVergeService
+  ${EndIf}
 
   ; Create file associations
   {{#each file_associations as |association| ~}}