feat: add signup links to events page

Author: flatplum

src/features/EventItem/EventItem.tsx

@@ -20,7 +20,7 @@ const EventItem = ({ name, date, brief, description, bgImage, frontImage, link,
   let linkText: string;
 
   if (!link) {
-    linkText = 'Event ended';
+    linkText = 'Upcoming!';
   } else {
     linkText = 'Sign up';
   }

src/routes/Events.tsx

@@ -30,7 +30,7 @@ const Events = () => {
       frontImage: DecodEdImage2,
       altBgImage: "Students in a classroom taking part of the DecodED workshop.",
       altFrontImage: "Classroom with supplies table in front with several students attending DecodED workshop in the background.",
-      link: "",
+      link: "https://events.humanitix.com/decoded-2026",
     },
     {
       name: "Hackiethon",
@@ -42,7 +42,7 @@ const Events = () => {
       frontImage: HackiethonImage,
       altBgImage: "HackMelbourne committee members in a lecture hall setting up hackathon competition.",
       altFrontImage: "Students in a lecture hall viewing hackathon competition being presented.",
-      link: "",
+      link: "https://events.humanitix.com/hackiethon-2026",
     },
     {
       name: "Melbourne Hack",