Initial working translator implementation

frontend/src/stores/auth.ts

@@ -0,0 +1,30 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import { me as apiMe, logout as apiLogout } from '../api'
+
+export const useAuthStore = defineStore('auth', () => {
+  const user_id = ref<string | null>(null)
+  const loaded = ref(false)
+
+  const isLoggedIn = computed(() => !!user_id.value && loaded.value)
+
+  async function check() {
+    if (loaded.value) return
+    try {
+      const data = await apiMe()
+      user_id.value = data.user_id
+    } catch {
+      user_id.value = null
+    } finally {
+      loaded.value = true
+    }
+  }
+
+  async function logout() {
+    await apiLogout()
+    user_id.value = null
+    window.location.hash = '#/login'
+  }
+
+  return { user_id, loaded, isLoggedIn, check, logout }
+})