Implement event registration functionality: Add EventRegistration model to Prisma schema, enabling user event registrations. Enhance EventsPageSection component with registration checks, calendar view, and improved event display. Refactor event rendering logic to separate upcoming and past events, improving user experience.

prisma/migrations/20251209204709_add_event_registrations/migration.sql

@@ -0,0 +1,18 @@
+-- CreateTable
+CREATE TABLE "EventRegistration" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "eventId" TEXT NOT NULL,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "EventRegistration_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "EventRegistration_eventId_fkey" FOREIGN KEY ("eventId") REFERENCES "Event" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateIndex
+CREATE INDEX "EventRegistration_userId_idx" ON "EventRegistration"("userId");
+
+-- CreateIndex
+CREATE INDEX "EventRegistration_eventId_idx" ON "EventRegistration"("eventId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "EventRegistration_userId_eventId_key" ON "EventRegistration"("userId", "eventId");