Add list view for results and improve grid view

web/src/cities/result/GridResult.tsx

@@ -0,0 +1,33 @@
+import { Component } from "solid-js";
+
+import { CityChart } from "../../components/chart/CityChart";
+import { DataQuery } from "../helpers";
+
+export const GridResult: Component<{ city: string, query: DataQuery, result: any }> = ({ city, query, result }) => {
+    return (
+        <div class="item">
+            <h4>{ city }</h4>
+            {
+                isDateNumber(result)
+                    ? <CityChart city={()=>city} data={()=>result} query={()=>query}/>
+                    : <p>{ result }</p>
+            }
+        </div>
+    );
+}
+
+function isDateNumber(value: unknown): value is [string, number | null][] {
+    if (!Array.isArray(value)) return false;
+    for (let i = 0; i < value.length; i++) {
+        let item = value[i];
+        if (
+            !Array.isArray(item)
+            || item.length !== 2
+            || typeof item[0] !== "string"
+            || (typeof item[1] !== "number" && item[1] !== null)
+        ) {
+            return false;
+        }
+    }
+    return true;
+}