feat: BizGaze Connect home, BizGaze login, modular backend, /api/v1

User-facing
- New post-login home (/home): chat rail + Share/Connect (embedded) + Meeting; login lives here when logged out
- Landing: "Log in with BizGaze" + no-login screen share
- Console replaced by a role-scoped Dashboard (/dashboard): admins see all team sessions, others see only their own; stats + CSV/PDF export
- Recordings saved as MP4 (H.264/AAC) with WebM fallback; old .webm still downloadable
- Fix: duplicate "Sign in" on the login card

Auth / integration
- BizGaze as identity provider: /api/login validates against BIZGAZE_LOGIN_URL (env-gated) and provisions a local user
- Phase 2 start: /api/v1 alias for all /api routes; Authorization: Bearer accepted across HTTP + WS; login returns a token (for native desktop/mobile clients)

Backend refactor (Phase 1, behavior-preserving)
- Split server.js into config/lib/session/presence/routes/static/signaling + repos (data-access) + bizgaze (service)
- All SQL behind repos.js, tenant-scoped (tenantId == team_id for now)
- e2e updated to current flow (21/21 pass before and after)

Docs: ARCHITECTURE.md (target architecture + phased plan), CLAUDE.md repo layout, .env.example BIZGAZE_LOGIN_URL

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/lib.js

@@ -0,0 +1,28 @@
+// Small HTTP helpers shared across the server.
+const now = () => Date.now();
+
+const json = (res, code, body) => {
+  res.writeHead(code, { 'Content-Type': 'application/json' });
+  res.end(JSON.stringify(body));
+};
+
+function readBody(req) {
+  return new Promise((resolve) => {
+    let data = '';
+    req.on('data', (c) => (data += c));
+    req.on('end', () => {
+      try { resolve(data ? JSON.parse(data) : {}); } catch { resolve({}); }
+    });
+  });
+}
+
+function parseCookies(req) {
+  const out = {};
+  (req.headers.cookie || '').split(';').forEach((c) => {
+    const [k, ...v] = c.trim().split('=');
+    if (k) out[k] = decodeURIComponent(v.join('='));
+  });
+  return out;
+}
+
+module.exports = { now, json, readBody, parseCookies };