feat: frontend & main controller

frontend/index.html

@@ -77,9 +77,9 @@
             update(data) {
                 let state = data.state;
                 if (state == "identified") this.type = data.type;
-
-                this.state = state;
                 if (state == "identify") this.imageUrl = `/photo?${Date.now()}`
+                
+                this.state = state;
             },
             async polling() {
                 let res, data;