fix(csp): whitelist Umami analytics origin so tracking works

The CSP script-src/connect-src didn't include the Umami host
(fickanalytics.phluit.net), so the browser blocked both loading script.js and
the event beacons (POST /api/send) — analytics recorded 0 visits despite the
site being live. Add a umamiOrigin() helper (derived from NEXT_PUBLIC_UMAMI_SRC,
defaulting to the shared phluit instance) and include it in script-src and
connect-src.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

proxy.ts

@@ -41,6 +41,19 @@ function sentryIngestOrigin(): string | null {
   }
 }
 
+// Origin serving the Umami analytics script (script.js) and receiving its event
+// beacons (POST /api/send). Mirrors the component default so the CSP allows both
+// loading the script AND sending events; stays in sync with NEXT_PUBLIC_UMAMI_SRC
+// when overridden.
+function umamiOrigin(): string {
+  const src = process.env.NEXT_PUBLIC_UMAMI_SRC || "https://fickanalytics.phluit.net/script.js"
+  try {
+    return new URL(src).origin
+  } catch {
+    return ""
+  }
+}
+
 // Build the Content-Security-Policy. `script-src` uses 'unsafe-inline' because
 // Next.js 16's Turbopack build does NOT stamp a per-request nonce onto its
 // inline hydration scripts (`self.__next_f.push(...)`). A nonce-based policy
@@ -54,13 +67,20 @@ function buildCsp(): string {
 
   // Dev additionally needs 'unsafe-eval' (Turbopack HMR) plus a dev websocket
   // (added to connect-src below).
-  const scriptSrc = isDev
-    ? `script-src 'self' 'unsafe-inline' 'unsafe-eval' https://challenges.cloudflare.com`
-    : `script-src 'self' 'unsafe-inline' https://challenges.cloudflare.com`
+  const umami = umamiOrigin()
+  const scriptSrc = [
+    "script-src 'self' 'unsafe-inline'",
+    isDev ? "'unsafe-eval'" : "",
+    "https://challenges.cloudflare.com",
+    umami, // load the Umami analytics script
+  ]
+    .filter(Boolean)
+    .join(" ")
   const connectSrc = [
     "connect-src 'self'",
     isDev ? "ws: wss:" : "",
     "https://api.stripe.com https://api.openai.com https://challenges.cloudflare.com",
+    umami, // Umami event beacons (POST /api/send)
     sentry ?? "",
   ]
     .filter(Boolean)