frontend: deep-link via ?instance=; client/frontend default to :9090; Makefile help; v1.1.0

- cmd/frontend/web: honour ?instance=<hostname> query parameter on the initial scope hydration so /view/?instance=lb-ams opens the dashboard scoped to that maglevd. The cookie is updated on consumption; an unknown name still falls back to the first server via App.tsx. - cmd/client, cmd/frontend: --server now accepts bare hostnames. A new internal/netutil.EnsurePort canonicalises addresses by appending :9090 when no port is given, with bracketing for bare IPv6 literals. Unit test covers the IPv4/IPv6/bracketed/already-ported permutations. - Makefile: new self-documenting `help` target as the default rule; every user-facing target now carries a `## ` description that the awk-based help auto-extracts. fixstyle-web skips with a friendly message when prettier isn't installed instead of failing on npx. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-01 10:27:16 +02:00
parent 9a3c5c5dc0
commit fb61e72e06
9 changed files with 142 additions and 29 deletions
@@ -5,7 +5,7 @@
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="icon" type="image/x-icon" href="/view/favicon.ico" />
    <title>maglev</title>
-    <script type="module" crossorigin src="/view/assets/index-3m4Pjc8_.js"></script>
+    <script type="module" crossorigin src="/view/assets/index-AJWk_JCf.js"></script>
    <link rel="stylesheet" crossorigin href="/view/assets/index-3BvNJ7QB.css">
  </head>
  <body>
@@ -37,7 +37,27 @@ function writeCookie(name: string | undefined) {
  }
 }

-const [scope, setScopeRaw] = createSignal<string | undefined>(readCookie());
+// readInitialScope honours a `?instance=<hostname>` deep-link query
+// parameter ahead of the cookie, so a shared URL like /view/?instance=lb-ams
+// opens the dashboard scoped to that maglevd. The named instance is also
+// written back to the cookie so a subsequent reload without the param
+// keeps the same selection. App.tsx still validates this against the
+// fetched snapshot list, so a stale or unknown name falls back to the
+// first server rather than leaving the SPA pinned to a ghost.
+function readInitialScope(): string | undefined {
+  try {
+    const fromURL = new URLSearchParams(window.location.search).get("instance");
+    if (fromURL) {
+      writeCookie(fromURL);
+      return fromURL;
+    }
+  } catch {
+    // window.location is unavailable in non-browser contexts.
+  }
+  return readCookie();
+}
+
+const [scope, setScopeRaw] = createSignal<string | undefined>(readInitialScope());

 // setScope wraps the raw signal setter so every selection change writes
 // back to the cookie. Callers use this exactly like the old setScope —