Enhance API error handling, add lastError tracking, and implement admin home template

public/templates/standard/template.json

@@ -7,22 +7,32 @@
             "error.css"
         ]
     },
+
     "setup":{
         "name":"setup",
         "dir_name":"setup",
         "html_file":"setup.html",
         "css_files":[]
     },
+
     "entrys_frontend":{
         "name":"entrys_frontend",
         "dir_name":"entrys_frontend",
         "html_file":"entrys_frontend.html",
         "css_files":[]
     },
+
     "login":{
         "name":"login",
         "dir_name":"login",
         "html_file":"login.html",
         "css_files":[]
+    },
+
+    "admin_home":{
+        "name":"admin_home",
+        "dir_name":"admin_home",
+        "html_file":"home.html",
+        "css_files":[]
     }
 }