frontend: Owner management

frontend/app/composables/useAuth.ts

@@ -1,15 +1,46 @@
+function decodeJwt(token: string) {
+  try {
+    const payload = token.split(".")[1]
+    const decoded = JSON.parse(atob(payload))
+    return decoded
+  } catch {
+    return null
+  }
+}
 export function useAuth() {
-  const token = useState("token", () => null)
+  const token = useState<string | null>("token", () => null)
 
   function setToken(t: string) {
     token.value = t
-    localStorage.setItem("token", t)
+
+    if (typeof window !== "undefined") {
+      localStorage.setItem("token", t)
+    }
   }
 
   function loadToken() {
-    token.value = localStorage.getItem("token")
+    if (typeof window !== "undefined") {
+      const stored = localStorage.getItem("token")
+      if (!stored) return
+
+        const payload = decodeJwt(stored)
+        if( !payload || !payload.exp || payload.exp * 1000 < Date.now()) {
+          console.info("Token expired - removing it from storage")
+          localStorage.removeItem("token")
+          token.value = null
+        }
+        token.value = stored
+      
+    }
   }
 
-  return { token, setToken, loadToken }
-}
+  function logout() {
+    token.value = null
 
+    if (typeof window !== "undefined") {
+      localStorage.removeItem("token")
+    }
+  }
+
+  return { token, setToken, loadToken, logout }
+}