docs: remove decorative emojis

Gitea's markdown renderer displays keycap emojis (1️⃣, 2️⃣) as broken
boxes. Strip all decorative emojis from doc files for cleaner rendering.

SUMMARY.md

@@ -2,7 +2,7 @@
 
 ## 部署結果
 
-✅ **NetBird Self-Hosted 成功部署於 `192.168.42.127`**
+**NetBird Self-Hosted 已部署於 `192.168.42.127`**
 
 - 部署日期：2026-04-17
 - 存取方式：`http://192.168.42.127`
@@ -65,10 +65,10 @@ reopen fd 8: permission denied
 
 | 端點 | 狀態 | 說明 |
 |------|------|------|
-| `http://192.168.42.127/` | ✅ 200 | Dashboard Web UI |
-| `http://192.168.42.127/oauth2/.well-known/openid-configuration` | ✅ 200 | OIDC Discovery |
-| STUN `:3478/udp` | ✅ | NAT 穿透 |
-| 內部 gRPC (Signal + Management) | ✅ | h2c via Caddy |
+| `http://192.168.42.127/` | 200 | Dashboard Web UI |
+| `http://192.168.42.127/oauth2/.well-known/openid-configuration` | 200 | OIDC Discovery |
+| STUN `:3478/udp` | | NAT 穿透 |
+| 內部 gRPC (Signal + Management) | | h2c via Caddy |
 
 ## 疑難排解記錄