feat: local dev setup with SSR fix and one-command dev script

- Add Next.js instrumentation.ts to polyfill Node.js v25+ broken localStorage
- Add dev-setup.sh for one-command local development setup
- Disable Supabase analytics in config.toml (avoids slow logflare image pull)
- Switch backend dev script to tsx watch for better DX

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

website-monitoring-frontend/src/instrumentation.ts

@@ -0,0 +1,24 @@
+/**
+ * Next.js instrumentation — runs before any other code on the server.
+ * Patches the broken Node.js v25+ localStorage (--localstorage-file not set).
+ */
+export async function register() {
+  if (typeof globalThis.localStorage !== "undefined") {
+    const ls = globalThis.localStorage;
+    if (typeof ls.getItem !== "function") {
+      const store = new Map<string, string>();
+      Object.defineProperty(globalThis, "localStorage", {
+        value: {
+          getItem: (key: string) => store.get(key) ?? null,
+          setItem: (key: string, val: string) => { store.set(key, val); },
+          removeItem: (key: string) => { store.delete(key); },
+          clear: () => { store.clear(); },
+          get length() { return store.size; },
+          key: (i: number) => Array.from(store.keys())[i] ?? null,
+        },
+        writable: true,
+        configurable: true,
+      });
+    }
+  }
+}

website-monitoring-frontend/supabase/config.toml

@@ -315,7 +315,7 @@ deno_version = 1
 # secret_key = "env(SECRET_VALUE)"
 
 [analytics]
-enabled = true
+enabled = false
 port = 54327
 # Configure one of the supported backends: `postgres`, `bigquery`.
 backend = "postgres"