fix(e2e): repair failing suite — a11y fixes and stale assertions

Three product a11y defects: drop role="radiogroup" from the /join PWYC
<ul> (it stripped the list role; native radios already group), use
--parch-text on the active contribution chip (was --text-bright, 1.17:1
on --parch), and label the New tag pool USelect on event create.

Three stale tests: real event-type filter labels, updated location
placeholder, and click the label instead of the hidden 0×0 radio.

e2e/admin-events.spec.js

@@ -88,7 +88,7 @@ test.describe('Admin events CRUD', () => {
       .fill('e2e test event description')
 
     await adminPage
-      .getByPlaceholder('e.g., https://zoom.us/j/123... or #channel-name')
+      .getByPlaceholder('e.g., https://zoom.us/j/123..., #channel-name, or TBD')
       .fill('https://example.com/zoom')
 
     const startInput = adminPage.getByPlaceholder(

e2e/events.spec.js

@@ -11,7 +11,7 @@ test.describe('Events list page', () => {
     const filterBar = page.locator('.filter-bar')
     await expect(filterBar).toBeVisible()
 
-    for (const label of ['All', 'Workshops', 'Community', 'Social', 'Showcase']) {
+    for (const label of ['All', 'Talk / Presentation', 'Workshop', 'Community Meetup', 'Co-working Session', 'Peer Session', 'Skills Share', 'Info Session']) {
       await expect(filterBar.locator('button', { hasText: label })).toBeVisible()
     }
   })
@@ -36,7 +36,7 @@ test.describe('Events list page', () => {
     // Wait for Vue hydration — the "All" filter should have the active class once reactive
     const allBtn = page.locator('.filter-btn', { hasText: 'All' })
     await expect(allBtn).toHaveClass(/active/, { timeout: 10000 })
-    const workshopsBtn = page.locator('.filter-bar button', { hasText: 'Workshops' })
+    const workshopsBtn = page.locator('.filter-bar button', { hasText: 'Workshop' })
     await workshopsBtn.click()
     await expect(workshopsBtn).toHaveClass(/active/, { timeout: 5000 })
   })

e2e/join-flow.spec.js

@@ -84,7 +84,7 @@ test.describe('Join page — member signup flow', () => {
     await page.locator('#join-name').fill('E2E Test User')
     await page.locator('#join-email').fill(uniqueEmail)
     // Pick the $0 preset
-    await page.locator('#pwyc-0').check({ force: true })
+    await page.locator('label[for="pwyc-0"]').click()
     await page.getByRole('checkbox', { name: /Community Guidelines/ }).check()
 
     await expect(page.locator('.submit-btn')).toBeEnabled()
@@ -191,7 +191,7 @@ test.describe('Join page — member signup flow', () => {
 
     await page.locator('#join-name').fill('Dup Test User')
     await page.locator('#join-email').fill(duplicateEmail)
-    await page.locator('#pwyc-0').check({ force: true })
+    await page.locator('label[for="pwyc-0"]').click()
     await page.getByRole('checkbox', { name: /Community Guidelines/ }).check()
     await page.locator('.submit-btn').click()