fix: install notice showing in Chinese and not recognizing MSI install path

- Use app.getPreferredSystemLanguages() for reliable OS language detection
  instead of relying solely on app.getLocale() which returns Chromium's
  internal locale (was returning zh-CN on pt-BR systems)
- Support both Squirrel (%LOCALAPPDATA%) and WiX/MSI (Program Files)
  install directories when checking if app runs from expected location
- Extract matchLocaleTag helper for cleaner language resolution logic
- Add getAllExpectedInstallRoots to enumerate all valid install paths

src/main.ts

@@ -116,6 +116,8 @@ function isRunningFromExpectedInstallDir() {
     localAppData: process.env.LOCALAPPDATA,
     appName: app.getName(),
     execPath: process.execPath,
+    programFiles: process.env.ProgramFiles,
+    programFilesX86: process.env['ProgramFiles(x86)'],
   });
 }
 
@@ -140,6 +142,7 @@ function showWindowsInstallNoticeIfNeeded() {
   hasShownInstallNotice = true;
   const language = resolveInstallNoticeLanguage({
     configLanguage: startupConfig?.language,
+    preferredLanguages: app.getPreferredSystemLanguages(),
     locale: app.getLocale(),
   });
   const text = getInstallNoticeText(language);