Add Tier 2 email features: AI draft, Calendar→Email announce, delivery status, engagement badges; v1.1.24

- EmailPage: useLocation to accept pre-filled compose from Calendar; delivery status pill on sent bubbles; AI Draft button calling ANTHROPIC_API_KEY endpoint
- CalendarPage: useNavigate + announceEpisode(); ✉ Announce button in episode edit popover
- ContactsPage: emailStatus types; unreplied badge; best delivery status pill; engagement score stars
- server/routes/contact.js: POST /api/admin-contact-submissions/:id/draft-reply → Anthropic claude-haiku-4-5

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/routes/contact.js

@@ -812,4 +812,48 @@ export function register(app) {
     res.setHeader('Content-Disposition', `attachment; filename="subscribers-${new Date().toISOString().slice(0, 10)}.csv"`)
     res.send(csv)
   })
+
+  app.post('/api/admin-contact-submissions/:id/draft-reply', requireAdminAuth, async (req, res) => {
+    const apiKey = process.env.ANTHROPIC_API_KEY
+    if (!apiKey) { res.status(503).json({ message: 'ANTHROPIC_API_KEY is not configured on the server.' }); return }
+
+    const { id } = req.params
+    if (!id || typeof id !== 'string') { res.status(400).json({ message: 'Invalid submission id.' }); return }
+
+    const submission = state.contactSubmissions.find(s => s.id === id.trim())
+    if (!submission) { res.status(404).json({ message: 'Submission not found.' }); return }
+
+    const senderName = submission.name?.trim() || 'this listener'
+    const messageText = submission.message?.trim() || '(no message body)'
+
+    try {
+      const apiRes = await fetch('https://api.anthropic.com/v1/messages', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'x-api-key': apiKey,
+          'anthropic-version': '2023-06-01',
+        },
+        body: JSON.stringify({
+          model: 'claude-haiku-4-5-20251001',
+          max_tokens: 400,
+          messages: [{
+            role: 'user',
+            content: `Draft a warm, personal reply to this message from a podcast listener. Write only the reply body — no greeting line (handled separately), no sign-off (handled by a signature). Keep it under 150 words. Be genuine and specific to their message.\n\nFrom: ${senderName}\nMessage:\n${messageText.slice(0, 1500)}`,
+          }],
+        }),
+      })
+
+      if (!apiRes.ok) {
+        const err = await apiRes.json().catch(() => ({}))
+        res.status(502).json({ message: err?.error?.message || 'AI draft request failed.' }); return
+      }
+
+      const data = await apiRes.json()
+      const draft = String(data?.content?.[0]?.text ?? '').trim()
+      res.json({ ok: true, draft })
+    } catch {
+      res.status(502).json({ message: 'AI draft request failed.' })
+    }
+  })
 }