Merge S7 (a1): newsletter — THE VYNDR REPORT

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

# Conflicts:
#	BUILD-STATE.md
#	CLAUDE.md

src/routes/internal.js

@@ -233,6 +233,32 @@ router.post('/ledger/settle', async (req, res) => {
   }
 });
 
+/**
+ * POST /api/internal/newsletter/send (Session S7, a1) — assemble today's
+ * VYNDR REPORT from the pipeline (snapshot signals + streak lens + the
+ * ledger record) and send it as a Listmonk campaign to the opted-in list.
+ *
+ * DELIBERATELY UNSCHEDULED: nothing calls this on a timer. The operator
+ * (or a future n8n cron, once Kev arms it) triggers the send. Env-gated —
+ * without LISTMONK_* config it's a calm no-op; an empty report (zero
+ * signals AND zero streaks) refuses to send.
+ *
+ * Body (optional): { sports?: string[] }  — defaults to ['mlb', 'wnba'].
+ */
+router.post('/newsletter/send', async (req, res) => {
+  const newsletter = require('../services/newsletterService');
+  const body = (req.body && typeof req.body === 'object') ? req.body : {};
+  const sports = Array.isArray(body.sports) && body.sports.length > 0 ? body.sports : undefined;
+  try {
+    const result = await newsletter.sendDailyReport({ sports });
+    return res.json(result);
+  } catch (err) {
+    const message = err && err.message ? err.message : String(err);
+    console.error('[internal/newsletter/send] failed:', message);
+    return res.status(500).json({ ok: false, error: message });
+  }
+});
+
 router.post('/outcomes/:sport', async (req, res) => {
   const outcomes = require('../services/outcomeService');
   try {