some basic statistics and invite tree, plus watch new data

bincio/serve/server.py

@@ -29,6 +29,7 @@ from bincio.serve.db import (
     create_user,
     delete_session,
     get_invite,
+    get_member_tree,
     get_session,
     get_setting,
     get_user,
@@ -173,6 +174,27 @@ async def me(bincio_session: Optional[str] = Cookie(default=None)) -> JSONRespon
     })
 
 
+@app.get("/api/stats")
+async def stats() -> JSONResponse:
+    """Public endpoint: member count, join dates, and invitation tree."""
+    import time as _time
+    now = int(_time.time())
+    members = get_member_tree(_get_db())
+    return JSONResponse({
+        "user_count": len(members),
+        "members": [
+            {
+                "handle": m["handle"],
+                "display_name": m["display_name"],
+                "member_since": m["created_at"],
+                "member_for_days": (now - m["created_at"]) // 86400,
+                "invited_by": m["invited_by"],
+            }
+            for m in members
+        ],
+    })
+
+
 @app.post("/api/auth/login")
 async def login(request: Request) -> JSONResponse:
     ip = request.client.host if request.client else "unknown"