Add documentation for new features: Vanish, Demoscreen, and Endscreen commands

- Introduced `/vanish` command documentation for player invisibility.
- Detailed `/demoscreen` and `/endscreen` for demo and cinematic effects.
- Updated sidebar structure to include new commands.
- Added supporting media assets for command demos.

Author: vLuckyyy

content/docs/eternalcore/features/adminchat.mdx

@@ -12,17 +12,37 @@ import { AlertBox } from "../../../components/ui/alert-box";
 
 ## Introduction
 
-The `/adminchat` command allows server staff to communicate privately, keeping sensitive discussions out of the public chat.
-It's ideal for coordination, moderation, and behind-the-scenes conversations between admins and moderators.
+The `/adminchat` command lets your staff communicate privately without cluttering public chat.
+It's useful for moderation, coordination, and any behind-the-scenes discussion between team members.
+
+With EternalCore 2.0, AdminChat now supports **two modes**:
+1. **Quick message mode** — send a single message to staff.
+2. **Channel mode** — enable a persistent admin-only chat channel until you turn it off.
 
 ## Usage
 
-To send a message to the admin chat, simply use the command followed by your message.
+### Quick Message
+Use this when you just want to send one message to the staff channel:
 
 ```text
 /adminchat <message>
+````
+
+### Channel Mode (Toggle)
+
+You can also enter a dedicated admin chat channel.
+While it’s enabled, everything you type goes directly to staff members.
+
+```text
+/adminchat
 ```
 
+Run the command again to leave the channel.
+
 ## Showcase
 
 ![adminchat.gif](/docs/eternalcore/adminchat.gif)
+![adminchat2.gif](/docs/eternalcore/adminchat-channel.gif)
+
+```
+

content/docs/eternalcore/features/demoscreen.mdx

@@ -0,0 +1,24 @@
+---
+title: Demoscreen Command
+description: Display a demo screen effect for a player.
+icon: Monitor
+---
+
+import { AlertBox } from "../../../components/ui/alert-box";
+
+<AlertBox type="info" title="Commands & Permissions">
+  Check out the **[Commands & Permissions](/docs/eternalcore/commands-and-permissions)** page for a full list of commands and permissions.
+</AlertBox>
+
+## Usage
+
+```text
+/demoscreen <player>
+````
+
+* Shows a demo screen effect for the specified player.
+
+## Demo
+
+![demoscreen-demo.gif](/docs/eternalcore/demoscreen.gif)
+

content/docs/eternalcore/features/endscreen.mdx

@@ -0,0 +1,24 @@
+---
+title: Endscreen Command
+description: Trigger a cinematic end-screen effect for a player.
+icon: Zap
+---
+
+import { AlertBox } from "../../../components/ui/alert-box";
+
+<AlertBox type="info" title="Commands & Permissions">
+  Check out the **[Commands & Permissions](/docs/eternalcore/commands-and-permissions)** page for a full list of commands and permissions.
+</AlertBox>
+
+## Usage
+
+```text
+/endscreen <player>
+````
+
+* Triggers a cinematic end-screen effect for the specified player.
+
+## Demo
+
+![endscreen-demo.gif](/docs/eternalcore/endscreen.gif)
+

content/docs/eternalcore/features/vanish.mdx

@@ -0,0 +1,42 @@
+---
+title: Vanish Command
+description: Hide yourself from other players and control visibility with the /vanish command.
+icon: EyeOff
+---
+
+import { AlertBox } from "../../../components/ui/alert-box";
+
+<AlertBox type="info" title="Commands & Permissions">
+  Check out the **[Commands & Permissions](/docs/eternalcore/commands-and-permissions)** page for full details on who can use /vanish and related permissions.
+</AlertBox>
+
+## Introduction
+
+The `/vanish` command allows staff to become invisible to regular players.
+It's perfect for moderation, monitoring, or just moving around the server without being noticed.
+
+With EternalCore 2.0, vanish is fully customizable via `config.yml`, giving you control over:
+
+- Silent join
+- Godmode
+- Night vision
+- Silent inventory access
+- Glow effect color
+- Block item drop / pickup
+- Block hunger loss
+- Block chat usage
+- Block block-placing
+
+## Usage
+
+```text
+/vanish [toggle]
+````
+
+* Running `/vanish` toggles your vanish state on or off.
+* Options can be configured globally in `config.yml` or overridden per permission group.
+
+## Showcase
+
+![vanish-demo.gif](/docs/eternalcore/vanish.gif)
+

lib/sidebar-structure.ts

@@ -46,15 +46,9 @@ export const docsStructure: DocItem[] = [
             icon: "PackageOpen",
           },
           {
-            title: "Fun Commands",
-            path: "/docs/eternalcore/features/fun",
-            children: [
-              {
-                title: "Elder Guardian",
-                path: "/docs/eternalcore/features/elderguardian",
-                icon: "ScanEye",
-              },
-            ],
+            title: "Elder Guardian",
+            path: "/docs/eternalcore/features/elderguardian",
+            icon: "ScanEye",
           },
           { title: "Feed", path: "/docs/eternalcore/features/feed", icon: "Apple" },
           { title: "Fireball", path: "/docs/eternalcore/features/fireball", icon: "Volleyball" },
@@ -107,6 +101,17 @@ export const docsStructure: DocItem[] = [
             icon: "MapPinHouse",
           },
           { title: "Time", path: "/docs/eternalcore/features/time", icon: "Clock" },
+          { title: "Vanish", path: "/docs/eternalcore/features/vanish", icon: "EyeOff" },
+          {
+            title: "Endscreen",
+            path: "/docs/eternalcore/features/endscreen",
+            icon: "Zap",
+          },
+          {
+            title: "Demoscreen",
+            path: "/docs/eternalcore/features/demoscreen",
+            icon: "Monitor",
+          },
         ],
       },
       { title: "FAQ", path: "/docs/eternalcore/faq", icon: "HelpCircle" },