feat: initial commit — local services (backend + manager dashboard + waiter PWA)

Includes all work to date:
- local_backend: FastAPI backend with products, orders, tables, shifts, cloud sync
- manager_dashboard: React manager UI with product/category management, reports, settings
- waiter_pwa: React PWA for waiter devices
- Category reparent endpoint and UI
- Waiter domain: local_ip sent on heartbeat, waiter_domain persisted from cloud response
- QR code modal in AppInfoTab for waiter domain
- Product form: number input spinners removed, category pre-selected on new product
- Category row: count badge moved to far right

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

local_backend/seed.py

@@ -0,0 +1,45 @@
+"""
+Run once to bootstrap the database with initial data.
+Usage: python seed.py
+"""
+import bcrypt
+from database import engine, Base, SessionLocal
+import models.user
+import models.table
+import models.printer
+import models.product
+import models.order
+
+Base.metadata.create_all(bind=engine)
+
+db = SessionLocal()
+
+try:
+    from models.user import User
+    from models.printer import Printer
+
+    # ── Manager account ───────────────────────────────────────────────────────
+    if not db.query(User).filter(User.username == "manager").first():
+        db.add(User(
+            username="manager",
+            pin_hash=bcrypt.hashpw(b"1234", bcrypt.gensalt()).decode(),
+            role="manager",
+        ))
+        print("Created manager account  (PIN: 1234)")
+    else:
+        print("Manager account already exists — skipping")
+
+    # ── Printers ──────────────────────────────────────────────────────────────
+    if not db.query(Printer).filter(Printer.name == "Kitchen").first():
+        db.add(Printer(name="Kitchen", ip_address="10.98.20.25", port=9100))
+        print("Created Kitchen printer")
+
+    if not db.query(Printer).filter(Printer.name == "Bar").first():
+        db.add(Printer(name="Bar", ip_address="10.98.20.25", port=9100))
+        print("Created Bar printer  (update IP when you have a second printer)")
+
+    db.commit()
+    print("\nDone. Change the manager PIN after first login.")
+
+finally:
+    db.close()