Add HTTP client wrapper and upgrade Axios to v1 (#594)

* refactor: add HTTP client wrapper and upgrade axios to v1

Introduce a thin HTTP wrapper (resources/scripts/http) that centralizes
axios configuration, interceptors, and auth header injection. All 43
files now import from the wrapper instead of axios directly, making
future library swaps a single-file change. Upgrade axios from 0.30.0
to 1.14.0.

* fix: restore window.Ls assignment removed during axios refactor

company.js uses window.Ls.set() to persist selected company,
which broke after the axios plugin (that set window.Ls) was deleted.

resources/scripts/http/index.js

@@ -0,0 +1,40 @@
+import axios from 'axios'
+import Ls from '@/scripts/services/ls.js'
+
+window.Ls = Ls
+
+const instance = axios.create({
+  withCredentials: true,
+  headers: {
+    common: {
+      'X-Requested-With': 'XMLHttpRequest',
+    },
+  },
+})
+
+instance.interceptors.request.use(function (config) {
+  const companyId = Ls.get('selectedCompany')
+  const authToken = Ls.get('auth.token')
+
+  if (authToken) {
+    config.headers.Authorization = authToken
+  }
+
+  if (companyId) {
+    config.headers.company = companyId
+  }
+
+  return config
+})
+
+function http(config) {
+  return instance(config)
+}
+
+http.get = instance.get.bind(instance)
+http.post = instance.post.bind(instance)
+http.put = instance.put.bind(instance)
+http.delete = instance.delete.bind(instance)
+http.patch = instance.patch.bind(instance)
+
+export default http