app installer hrefs + IIS /installers static

frontend/src/utils/basePath.js

@@ -12,6 +12,24 @@ export function withBase(path) {
   return BASE_URL + String(path).replace(/^\//, '')
 }
 
+// Resolve a stored file/link path for use in an <a href>. Full URLs (http,
+// https, file:, mailto:, ...) and UNC / protocol-relative paths (\\server,
+// //host) open as-is. A path relative to the app (e.g. 'installers/x.exe' or
+// './installers/x.exe') is mounted under the base so it does NOT resolve
+// against the current route - '/shopdb/applications/6' + 'installers/x.exe'
+// wrongly became '/shopdb/applications/installers/x.exe'.
+export function fileHref(path) {
+  if (!path) return null
+  const trimmed = String(path).trim()
+  if (!trimmed) return null
+  if (/^[a-z][a-z0-9+.-]*:/i.test(trimmed)
+      || trimmed.startsWith('\\\\')
+      || trimmed.startsWith('//')) {
+    return trimmed
+  }
+  return withBase('/' + trimmed.replace(/^(\.?\/)+/, ''))
+}
+
 // Inverse of withBase: turn a browser pathname (which includes the mount
 // base, e.g. '/ops/computers') into a router path ('/computers'). Router
 // navigation already applies the base; feeding it an un-stripped pathname