Initial commit: ExaMetra v1.0.0 — Free & open-source competence & grading platform

Features:
- 15+ views: Dashboard, Classes, Progress, Flower, Matrix, Assessments, Grading, Reports, Attendance, Calendar, Lesson Plans, Analytics, Parent Communication, Behavior Tracking, Settings
- 34+ API endpoints
- 30+ Prisma models
- 700+ i18n keys (German + English)
- Keyboard shortcuts (Cmd+K, Cmd+1-9, Cmd+/)
- Batch deletion, drag-and-drop seating, custom color palette
- Demo accounts (admin, teacher, student, parent)
- Dark mode, responsive design, print styles
- CSV/PDF export, notification system, onboarding tour
- Zero emojis — all replaced with Lucide icons
- MIT License

src/components/ui/accordion.tsx

@@ -0,0 +1,66 @@
+"use client"
+
+import * as React from "react"
+import * as AccordionPrimitive from "@radix-ui/react-accordion"
+import { ChevronDownIcon } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+function Accordion({
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Root>) {
+  return <AccordionPrimitive.Root data-slot="accordion" {...props} />
+}
+
+function AccordionItem({
+  className,
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Item>) {
+  return (
+    <AccordionPrimitive.Item
+      data-slot="accordion-item"
+      className={cn("border-b last:border-b-0", className)}
+      {...props}
+    />
+  )
+}
+
+function AccordionTrigger({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Trigger>) {
+  return (
+    <AccordionPrimitive.Header className="flex">
+      <AccordionPrimitive.Trigger
+        data-slot="accordion-trigger"
+        className={cn(
+          "focus-visible:border-ring focus-visible:ring-ring/50 flex flex-1 items-start justify-between gap-4 rounded-md py-4 text-left text-sm font-medium transition-all outline-none hover:underline focus-visible:ring-[3px] disabled:pointer-events-none disabled:opacity-50 [&[data-state=open]>svg]:rotate-180",
+          className
+        )}
+        {...props}
+      >
+        {children}
+        <ChevronDownIcon className="text-muted-foreground pointer-events-none size-4 shrink-0 translate-y-0.5 transition-transform duration-200" />
+      </AccordionPrimitive.Trigger>
+    </AccordionPrimitive.Header>
+  )
+}
+
+function AccordionContent({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof AccordionPrimitive.Content>) {
+  return (
+    <AccordionPrimitive.Content
+      data-slot="accordion-content"
+      className="data-[state=closed]:animate-accordion-up data-[state=open]:animate-accordion-down overflow-hidden text-sm"
+      {...props}
+    >
+      <div className={cn("pt-0 pb-4", className)}>{children}</div>
+    </AccordionPrimitive.Content>
+  )
+}
+
+export { Accordion, AccordionItem, AccordionTrigger, AccordionContent }