report back initialization failures

Signed-off-by: eternal-flame-AD <yume@yumechi.jp>

Cargo.toml

@@ -30,3 +30,6 @@ members = [
 
 [profile.release.package.unitdc-web]
 opt-level = "s"
+
+[profile.release]
+lto = true

crates/unitdc-web/ui/src/App.tsx

@@ -137,6 +137,13 @@ function App() {
           text: '',
         }
       ])
+    }).catch(e => {
+      addCells([
+        {
+          type: 'error',
+          text: (e as any).toString(),
+        }
+      ])
     });
   }