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/toggle-group.tsx

@@ -0,0 +1,73 @@
+"use client"
+
+import * as React from "react"
+import * as ToggleGroupPrimitive from "@radix-ui/react-toggle-group"
+import { type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+import { toggleVariants } from "@/components/ui/toggle"
+
+const ToggleGroupContext = React.createContext<
+  VariantProps<typeof toggleVariants>
+>({
+  size: "default",
+  variant: "default",
+})
+
+function ToggleGroup({
+  className,
+  variant,
+  size,
+  children,
+  ...props
+}: React.ComponentProps<typeof ToggleGroupPrimitive.Root> &
+  VariantProps<typeof toggleVariants>) {
+  return (
+    <ToggleGroupPrimitive.Root
+      data-slot="toggle-group"
+      data-variant={variant}
+      data-size={size}
+      className={cn(
+        "group/toggle-group flex w-fit items-center rounded-md data-[variant=outline]:shadow-xs",
+        className
+      )}
+      {...props}
+    >
+      <ToggleGroupContext.Provider value={{ variant, size }}>
+        {children}
+      </ToggleGroupContext.Provider>
+    </ToggleGroupPrimitive.Root>
+  )
+}
+
+function ToggleGroupItem({
+  className,
+  children,
+  variant,
+  size,
+  ...props
+}: React.ComponentProps<typeof ToggleGroupPrimitive.Item> &
+  VariantProps<typeof toggleVariants>) {
+  const context = React.useContext(ToggleGroupContext)
+
+  return (
+    <ToggleGroupPrimitive.Item
+      data-slot="toggle-group-item"
+      data-variant={context.variant || variant}
+      data-size={context.size || size}
+      className={cn(
+        toggleVariants({
+          variant: context.variant || variant,
+          size: context.size || size,
+        }),
+        "min-w-0 flex-1 shrink-0 rounded-none shadow-none first:rounded-l-md last:rounded-r-md focus:z-10 focus-visible:z-10 data-[variant=outline]:border-l-0 data-[variant=outline]:first:border-l",
+        className
+      )}
+      {...props}
+    >
+      {children}
+    </ToggleGroupPrimitive.Item>
+  )
+}
+
+export { ToggleGroup, ToggleGroupItem }