client/web: add localapi proxy

Adds proxy to the localapi from /api/local/ web client endpoint.
The localapi proxy is restricted to an allowlist of those actually
used by the web client frontend.

Updates tailscale/corp#13775

Signed-off-by: Sonia Appasamy <sonia@tailscale.com>

client/web/src/components/app.tsx

@@ -5,7 +5,7 @@ import useNodeData from "src/hooks/node-data"
 export default function App() {
   // TODO(sonia): use isPosting value from useNodeData
   // to fill loading states.
-  const { data, updateNode } = useNodeData()
+  const { data, refreshData, updateNode } = useNodeData()
 
   return (
     <div className="py-14">
@@ -15,7 +15,11 @@ export default function App() {
       ) : (
         <>
           <main className="container max-w-lg mx-auto mb-8 py-6 px-8 bg-white rounded-md shadow-2xl">
-            <Header data={data} updateNode={updateNode} />
+            <Header
+              data={data}
+              refreshData={refreshData}
+              updateNode={updateNode}
+            />
             <IP data={data} />
             <State data={data} updateNode={updateNode} />
           </main>