feat(admin): add icon + min height (#1046)

**Min height**:


![](https://github.com/user-attachments/assets/0c523283-0069-4d31-9ddf-f3d1558ce966)

**Adding icon**:


<img width="1233" alt="Capture d’écran 2025-04-17 à 22 00 51"
src="https://github.com/user-attachments/assets/ed279cf3-d7f1-46c5-966a-2a002c2a5935"
/>
<img width="1233" alt="Capture d’écran 2025-04-17 à 22 01 00"
src="https://github.com/user-attachments/assets/e817d996-342a-44d1-970c-389050d28bb5"
/>

Author: AugustinMauroy

frontend/islands/TicketMessageInput.tsx

@@ -1,5 +1,6 @@
 // Copyright 2024 the JSR authors. All rights reserved. MIT license.
 import { useState } from "preact/hooks";
+import { TbCheck, TbClock } from "tb-icons";
 import {
   AdminUpdateTicketRequest,
   FullUser,
@@ -35,7 +36,7 @@ export function TicketMessageInput(
       }}
     >
       <textarea
-        class="w-full block px-2 py-1.5 input-container input"
+        class="w-full block px-2 py-1.5 input-container input min-h-20"
         value={message}
         rows={3}
         placeholder="Type your message here..."
@@ -65,7 +66,17 @@ export function TicketMessageInput(
               });
             }}
           >
-            {ticket.closed ? "Re-open" : "Close"} ticket
+            {ticket.closed
+              ? (
+                <>
+                  <TbClock class="text-white" /> Re-open
+                </>
+              )
+              : (
+                <>
+                  <TbCheck class="text-white" /> Close
+                </>
+              )} ticket
           </button>
         )}
       </div>