Revert "Add missing admin action files and navigation links"

This reverts commit 41be6835bf.

src/actions/help-tickets.ts

@@ -22,12 +22,8 @@ export async function createTicket(formData: FormData): Promise<void> {
   if (!(await rateLimit(`ticket:${userId}`, 3, 60_000)).ok) return;
 
   const raw = {
-    title: String(formData.get("title") ?? "")
-      .trim()
-      .slice(0, 255),
-    content: String(formData.get("content") ?? "")
-      .trim()
-      .slice(0, 5000),
+    title: String(formData.get("title") ?? "").trim().slice(0, 255),
+    content: String(formData.get("content") ?? "").trim().slice(0, 5000),
   };
 
   const parsed = ticketSchema.safeParse(raw);