#37 — Telegram Groups & Shift Time Management (full epic, prod)

Gate 2 8/8 passed. One combined ship — nix-cafe b4fc18d + 77fd451, backend migration applied to prod.

A — Auto-link: tenant/shop get a tnt-tg-XXXXXX / shop-tg-XXXXXX code (backfilled for every tenant + shop). Add @nix_cafe_bot to a group and type /setadmin <code> (Main Admin group) or /setshop <code> (Shop group) — the bot links it, no chat ID needed. Plus /status, duplicate/invalid handling, and auto-deactivate when the bot is removed (my_chat_member).
B — Shift reminders: per-window Remind after + Repeat every on a new Settings → Store → Shift Management page; the reminder now repeats every N min until the session closes (was once) via an atomic claim-or-refresh upsert.
C — Notification taxonomy: two group tiers (Main Admin vs Shop), shop-aware routing (one dispatch reaches the shop’s group + tenant-wide admin), and new register-opened / payment / refund / cash-in-out events with ✅/❌ matched-vs-mismatched cash formats.

A1 ✓	Notifications page shows the tenant `/setadmin` code + shop codes (copyable).
A2 ✓	Webhook deployed + secret-gated (401 without the Telegram secret token).
C1 ✓	Shop-aware routing: a `register_opened` event reaches both the Shop group AND the Main Admin group.
C2 ✓	A different shop’s event does NOT leak to this Shop group (only the tenant-wide Admin matches).
B1 ✓	Repeat-dedup upsert is atomic: first send → fires, too-soon → skips, past `repeat_every` → fires again.
B2 ✓	Shift Management page renders + saves Remind after / Repeat every (DB-verified 3 / 9 min).
C3 ✓	End-to-end: opening a real shift fired `register_opened` to both seeded groups (Shop + Admin), logged in `telegram_send_log`.
— ✓	No 5xx across the run · 51/51 regression.

#37 — Telegram Groups & Shift Time Management (full epic · prod)

Part A — link a group with a code (Settings → Notifications)

Part B — Settings → Store → Shift Management