feat(admin): track capture-to-report conversion funnel

h5/server.js

@@ -29,6 +29,7 @@ const ReportUI = require('./js/report-ui.js');
 const BeijingTime = require('./js/beijing-time.js');
 const CaptureDiagnostics = require('./lib/capture-diagnostics.js');
 const WrinkleViews = require('./lib/wrinkle-views.js');
+const captureFunnel = require('./lib/capture-funnel.js')(path.join(DATA_ROOT, 'capture-funnel.jsonl'));
 const accounts = require('./lib/accounts.js')(path.join(DATA_ROOT, 'accounts'));
 
 /* 服务端评分引擎:与 C 端同一份公式(禁止复制公式,直接复用) */
@@ -751,6 +752,7 @@ function handleStats(req, res) {
     fail_total: failed.length,
     success_rate: finished.length ? Math.round(succeeded.length * 1000 / finished.length) / 10 : 0,
     avg_cost_ms: avgCost,
+    capture_funnel: captureFunnel.stats(now),
     fail_dist,
     dim_dist,
     group_dist,
@@ -874,6 +876,13 @@ async function handleAdmin(req, res, pathname, url) {
 http.createServer(async (req, res) => {
   const pathname = req.url.split('?')[0];
   if (await accounts.route(req, res, pathname)) return;
+  if (req.method === 'POST' && pathname === '/api/capture-funnel') {
+    if (!accounts.sameOrigin(req) || !accounts.session(req)) return sendJson(res, 403, { ok: false });
+    try {
+      const accepted = captureFunnel.ingest(JSON.parse((await readBody(req, 4096)).toString('utf8')));
+      return sendJson(res, accepted ? 200 : 400, { ok: accepted });
+    } catch (e) { return sendJson(res, e.message === 'TOO_LARGE' ? 413 : e instanceof SyntaxError ? 400 : 500, { ok: false }); }
+  }
   if (req.method === 'POST' && pathname === '/api/skin-analyze') return handleAnalyze(req, res);
   if (req.method === 'GET' && pathname === '/api/health') {
     res.writeHead(200, { 'Content-Type': 'application/json' });