iPhone beta joins via the TestFlight public link

The 'redoal testers' external group now has a public link
(https://testflight.apple.com/join/eR9dvHkz) — one tap on an iPhone,
no invitation flow. Replace the Apple-ID form (and its action/
record_as plumbing) with the link; no email collection, nothing for
us to process. The n8n named-invite workflow stays shelved in
redoal/redoal ops/ for a future curated group.

Lint: OK (9 questions, 5 aggregates).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ByshXuDEzH8hXh5qp4VgGk

questions/index.yaml

@@ -120,12 +120,7 @@ alternatives:
     description: >
       The network as it is being built — and we need collaborators on
       every new surface it grows. Desktop releases run free; the iPhone
-      build is a closed beta you can ask into below.
+      beta is one tap away below.
-    action: /joined-testers
-    consequence: [Request a TestFlight invite]
-    record_as: redoal_testers
-    encouragements:
-      - Watch your mail for the TestFlight invite.
     features:
       - name: Communicate
         description: >
@@ -150,19 +145,14 @@ alternatives:
           jq: >
             .[] | {name: .name, description: .body, tag: .tag_name,
             published: .published_at, url: null}
-      - name: Join the public testers
+      - name: Test the iPhone app
         description: >
           The desktop releases above run free, no sign-up. The iPhone
-          build rides TestFlight (Apple's closed beta), so it needs the
+          build rides TestFlight (Apple's beta program) — [join the
-          Apple ID you use with the App Store — leave it and we'll send
+          redoal testers](https://testflight.apple.com/join/eR9dvHkz)
-          an invite.
+          with one tap on your iPhone; no invitation, no email, no
+          waiting on us.
         icon: lucide:smartphone
-        requirements:
-          - name: name
-            label: Name
-          - name: email
-            label: Apple ID email
-            type: email
 
   - name: Hear from us when it matters
     description: >