Make manual eslint fixes

These are safe fixes, more complicated fixes can be done separately
(just disabled those errors for now).

- Reorder declarations to fix `no-use-before-define`
- Rename parameters for `no-shadow`
- Remove unused parameters, functions, imports
- Switch from `++` and `—` to `+= 1` and `-= 1` for `no-unary`
- Use object spreading instead of parameter reassignment in auth utils
- Use `window.location` instead of `location` global
- Use inline JSX strings instead of unescaped values
-

web/src/components/ErrorBoundary.jsx

@@ -69,16 +69,6 @@ class ErrorBoundaryImpl extends React.Component {
     navigator.clipboard.writeText(stack);
   }
 
-  render() {
-    if (this.state.error) {
-      if (this.state.unsupportedIndexedDB) {
-        return this.renderUnsupportedIndexedDB();
-      }
-      return this.renderError();
-    }
-    return this.props.children;
-  }
-
   renderUnsupportedIndexedDB() {
     const { t } = this.props;
     return (
@@ -130,6 +120,16 @@ class ErrorBoundaryImpl extends React.Component {
       </div>
     );
   }
+
+  render() {
+    if (this.state.error) {
+      if (this.state.unsupportedIndexedDB) {
+        return this.renderUnsupportedIndexedDB();
+      }
+      return this.renderError();
+    }
+    return this.props.children;
+  }
 }
 
 const ErrorBoundary = withTranslation()(ErrorBoundaryImpl); // Adds props.t