test(e2e): align specs with current page structure

join-flow:
- Form now requires Community Guidelines agreement; tests check the
  checkbox before expecting submit to enable.
- Contribution input is a numeric field with preset chip buttons, not a
  USelect with $0/mo options — fill the input directly.
- Success state lives in SignupFlowOverlay ("Welcome to Ghost Guild!");
  no .success-box exists. Match by heading instead.
- Inline .error-box renders OUTSIDE <form>, so duplicate-email assertion
  uses .signup-flow-overlay .error-box (which is the user-facing error).

member-profile:
- "How you appear to other members" copy was retired; replace with the
  stable "Show in Member Directory" structural label.
- Add waitForLoadState('networkidle') after goto for ClientOnly auth
  hydration so "Edit Profile" reliably appears within timeout.

board:
- Add waitForLoadState('networkidle') after goto so the action-bar's
  "+ New Post" click handler is bound before the test clicks.
- Submit button is named exactly "Post" — disambiguate from "+ New Post"
  buttons with { exact: true }.
- Delete is a two-step in-card confirm (Delete → Confirm), not a native
  browser dialog; drop the page.once('dialog') listener.

admin-board-channels:
- Channel name placeholder is "e.g., coop-formation" (no leading #).
- Slack Channel ID input only appears in the Edit modal (v-if="editingId"),
  not on Create — Slack channel is auto-created server-side. Drop the
  slack ID fill from the Create step.
- Add waitForLoadState('networkidle') before opening the modal.

e2e/member-profile.spec.js

@@ -3,9 +3,11 @@ import { test, expect } from './helpers/fixtures.js'
 test.describe('Member profile page', () => {
   test('profile page loads', async ({ adminPage }) => {
     await adminPage.goto('/member/profile')
+    await adminPage.waitForLoadState('networkidle')
     // Auth is checked client-side in onMounted — wait for profile form to render
     await expect(adminPage.getByText('Edit Profile')).toBeVisible({ timeout: 15000 })
-    await expect(adminPage.getByText('How you appear to other members')).toBeVisible()
+    // Verify a stable structural section label, not transient marketing copy
+    await expect(adminPage.getByText('Show in Member Directory')).toBeVisible()
   })
 
   test('form fields are present', async ({ adminPage }) => {
@@ -24,6 +26,7 @@ test.describe('Member profile page', () => {
 
   test('bio field accepts input', async ({ adminPage }) => {
     await adminPage.goto('/member/profile')
+    await adminPage.waitForLoadState('networkidle')
     await expect(adminPage.getByText('Edit Profile')).toBeVisible({ timeout: 15000 })
 
     const bio = adminPage.locator('textarea[placeholder*="Share your background"]')