feat: configure API dev proxy and improve useApiFetch error handling

- Add Nitro devProxy for local proxying of api/v1 and uploads to the backend server
- Improve useApiFetch to dynamically clear auth state and navigate to login on 401/403 errors
- Automatically strip Content-Type headers for multipart FormData upload request bodies
- Add css rule to fix Bootstrap Italia navbar link border display
- Add ts-expect-error tag to avoid type checking issues with bootstrap-italia bundle loading

app/assets/css/style.css

@@ -1,3 +1,7 @@
 a {
     text-decoration: none!important;
+}
+
+html body .navbar .navbar-collapsable .navbar-nav li.nav-item a.nav-link[data-focus-mouse="true"], .navbar .navbar-collapsable .navbar-nav li.nav-item button.nav-link[data-focus-mouse="true"] {
+    border-color: inherit !important
 }

app/composables/useApiFetch.ts

@@ -2,14 +2,48 @@ import { defu } from 'defu'
 
 export const useApiFetch = <T>(request: string, options: Parameters<typeof $fetch>[1] = {}) => {
   const config = useRuntimeConfig()
-  const token = useCookie('auth_token') // Make sure this matches the cookie name you use on login
+  const tokenCookie = useCookie('auth_token')
+  const tokenState = useState<string | null>('auth_token_state')
+
+  const tokenValue = tokenState.value ?? tokenCookie.value
 
   const defaults: Parameters<typeof $fetch>[1] = {
     baseURL: config.public.api as string,
-    headers: token.value ? { Authorization: `Bearer ${token.value}` } : {},
+    headers: tokenValue ? { Authorization: `Bearer ${tokenValue}` } : {},
   }
 
   const params = defu(options, defaults)
 
-  return $fetch<T>(request, params)
+  try {
+    if (params?.body && typeof FormData !== 'undefined' && params.body instanceof FormData) {
+      if (params.headers && 'Content-Type' in params.headers) {
+        delete params.headers['Content-Type']
+      }
+    }
+  } catch (e) {}
+
+  return $fetch<T>(request, params).catch((err: any) => {
+    const status = err?.statusCode || err?.status || err?.response?.status
+
+    if (status === 401 || status === 403) {
+      try {
+        tokenCookie.value = null
+        tokenState.value = null
+        const authUser = useState('auth_user')
+        authUser.value = null
+        
+        console.error(`[API] Authentication error (${status}) - token cleared`)
+      } catch (e) {
+        console.error('[API] Error clearing auth state:', e)
+      }
+
+      try {
+        navigateTo('/auth/login')
+      } catch (e) { 
+        console.error('[API] Error navigating to login:', e)
+      }
+    }
+
+    throw err
+  })
 }

app/plugins/bootstrap-italia.client.ts

@@ -1,3 +1,4 @@
 export default defineNuxtPlugin(async (nuxtApp) => {
+  // @ts-expect-error
   await import('bootstrap-italia/dist/js/bootstrap-italia.bundle.min.js')
 })