From 66a415b0ddd2b0a5bbd24c9091a48afcdb4eac54 Mon Sep 17 00:00:00 2001
From: Thatsaphorn Atchariyaphap <thatsaphorn@outlook.de>
Date: Wed, 2 Jul 2025 02:24:35 +0000
Subject: [PATCH] internal frontend implementation with keycloak authentication

---
 .gitlab-ci-template.yml                       |    2 +
 docker-compose.yml                            |    2 +
 frontend/.gitlab-ci.yml                       |    5 -
 internal_frontend/.gitlab-ci.yml              |   16 +
 .../app/api/auth/[...nextauth]/route.ts       |    5 +
 internal_frontend/app/apps/page.tsx           |    7 +
 .../demo/kanzlei/bilanzbuchhalter/page.tsx    |    7 +
 internal_frontend/app/demo/kanzlei/page.tsx   |    7 +
 .../app/demo/kanzlei/rechtsanwalt/page.tsx    |    7 +
 .../app/demo/kanzlei/steuer/page.tsx          |    7 +
 internal_frontend/app/demo/settings/page.tsx  |   10 +
 internal_frontend/app/globals.css             |  124 +-
 internal_frontend/app/layout.tsx              |   88 +-
 internal_frontend/components.json             |   21 +
 internal_frontend/components/app-sidebar.tsx  |  173 +++
 .../components/dynamic-breadcrumb.tsx         |   42 +
 internal_frontend/components/login-screen.tsx |   22 +
 .../components/theme-provider.tsx             |   11 +
 .../components/ui/breadcrumb.tsx              |  109 ++
 internal_frontend/components/ui/button.tsx    |   59 +
 internal_frontend/components/ui/card.tsx      |   92 ++
 .../components/ui/collapsible.tsx             |   33 +
 .../components/ui/dropdown-menu.tsx           |  257 ++++
 internal_frontend/components/ui/input-otp.tsx |   77 ++
 internal_frontend/components/ui/input.tsx     |   21 +
 internal_frontend/components/ui/separator.tsx |   28 +
 internal_frontend/components/ui/sheet.tsx     |  139 ++
 internal_frontend/components/ui/sidebar.tsx   |  726 +++++++++++
 internal_frontend/components/ui/skeleton.tsx  |   13 +
 internal_frontend/components/ui/tooltip.tsx   |   61 +
 internal_frontend/hooks/use-mobile.ts         |   19 +
 internal_frontend/lib/auth/authOptions.ts     |   86 ++
 internal_frontend/lib/breadcrumb-map.ts       |    8 +
 internal_frontend/lib/utils.ts                |    6 +
 internal_frontend/package-lock.json           | 1153 ++++++++++++++++-
 internal_frontend/package.json                |   25 +-
 internal_frontend/tsconfig.json               |   22 +-
 internal_frontend/types/auth.d.ts             |   16 +
 internal_frontend/utils/BreadcrumbUtils.ts    |   28 +
 39 files changed, 3475 insertions(+), 59 deletions(-)
 create mode 100644 internal_frontend/app/api/auth/[...nextauth]/route.ts
 create mode 100644 internal_frontend/app/apps/page.tsx
 create mode 100644 internal_frontend/app/demo/kanzlei/bilanzbuchhalter/page.tsx
 create mode 100644 internal_frontend/app/demo/kanzlei/page.tsx
 create mode 100644 internal_frontend/app/demo/kanzlei/rechtsanwalt/page.tsx
 create mode 100644 internal_frontend/app/demo/kanzlei/steuer/page.tsx
 create mode 100644 internal_frontend/app/demo/settings/page.tsx
 create mode 100644 internal_frontend/components.json
 create mode 100644 internal_frontend/components/app-sidebar.tsx
 create mode 100644 internal_frontend/components/dynamic-breadcrumb.tsx
 create mode 100644 internal_frontend/components/login-screen.tsx
 create mode 100644 internal_frontend/components/theme-provider.tsx
 create mode 100644 internal_frontend/components/ui/breadcrumb.tsx
 create mode 100644 internal_frontend/components/ui/button.tsx
 create mode 100644 internal_frontend/components/ui/card.tsx
 create mode 100644 internal_frontend/components/ui/collapsible.tsx
 create mode 100644 internal_frontend/components/ui/dropdown-menu.tsx
 create mode 100644 internal_frontend/components/ui/input-otp.tsx
 create mode 100644 internal_frontend/components/ui/input.tsx
 create mode 100644 internal_frontend/components/ui/separator.tsx
 create mode 100644 internal_frontend/components/ui/sheet.tsx
 create mode 100644 internal_frontend/components/ui/sidebar.tsx
 create mode 100644 internal_frontend/components/ui/skeleton.tsx
 create mode 100644 internal_frontend/components/ui/tooltip.tsx
 create mode 100644 internal_frontend/hooks/use-mobile.ts
 create mode 100644 internal_frontend/lib/auth/authOptions.ts
 create mode 100644 internal_frontend/lib/breadcrumb-map.ts
 create mode 100644 internal_frontend/lib/utils.ts
 create mode 100644 internal_frontend/types/auth.d.ts
 create mode 100644 internal_frontend/utils/BreadcrumbUtils.ts

diff --git a/.gitlab-ci-template.yml b/.gitlab-ci-template.yml
index 897448a..e77af38 100644
--- a/.gitlab-ci-template.yml
+++ b/.gitlab-ci-template.yml
@@ -137,11 +137,13 @@
     sed -i "s|registry.boomlab.party/rheinsw/rheinsw-mono-repo/internal_frontend|registry.boomlab.party/rheinsw/rheinsw-mono-repo/internal_frontend@$(cat digest-internal_frontend.txt)|g" docker-compose.generated.yml
 
     echo "Copying docker-compose.generated.yml to $HOST:$REMOTE_ENV_PATH/docker-compose.yml"
+    
     # Ensure remote path exists before scp
     ssh -p "$PORT" "$DEPLOY_USER@$HOST" "mkdir -p $REMOTE_ENV_PATH"
     
     # Copy
     scp -P "$PORT" docker-compose.generated.yml "$DEPLOY_USER@$HOST:$REMOTE_ENV_PATH/docker-compose.yml"
+    scp -P "$PORT" internal_frontend/.env "$DEPLOY_USER@$HOST:$REMOTE_ENV_PATH/internal_frontend.env"
 
     echo "Deploying on $HOST"
     ssh -p "$PORT" "$DEPLOY_USER@$HOST" "
diff --git a/docker-compose.yml b/docker-compose.yml
index eec2cdb..fbb28e9 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -29,6 +29,8 @@ services:
   internal_frontend:
     image: registry.boomlab.party/rheinsw/rheinsw-mono-repo/internal_frontend
     container_name: internal_frontend
+    env_file:
+      - ./internal_frontend.env
     ports:
       - "5101:3000"
     restart: on-failure
diff --git a/frontend/.gitlab-ci.yml b/frontend/.gitlab-ci.yml
index 44f54b9..c354540 100644
--- a/frontend/.gitlab-ci.yml
+++ b/frontend/.gitlab-ci.yml
@@ -10,11 +10,6 @@ build_frontend:
   script:
     - |
       cd frontend
-      echo "NEXT_PUBLIC_HCAPTCHA_SITE_KEY=$HCAPTCHA_SITE_KEY" > .env
-      echo "NEXT_PUBLIC_RECAPTCHA_SITE_KEY=$RECAPTCHA_SITE_KEY" >> .env
-      echo "HCAPTCHA_SECRET=$HCAPTCHA_SECRET" >> .env
-      echo "Contents of .env file:"
-      cat .env
       npm install
       npx next build
   artifacts:
diff --git a/internal_frontend/.gitlab-ci.yml b/internal_frontend/.gitlab-ci.yml
index 72ae43b..af8e29f 100644
--- a/internal_frontend/.gitlab-ci.yml
+++ b/internal_frontend/.gitlab-ci.yml
@@ -10,10 +10,26 @@ build_internal_frontend:
   script:
     - |
       cd internal_frontend
+      echo "# environment file for internal_frontend" > .env
+      if [ "$CI_COMMIT_REF_NAME" = "production" ]; then
+        echo "NEXTAUTH_URL=$NEXTAUTH_URL_PROD" >> .env
+        echo "NEXTAUTH_SECRET=$NEXTAUTH_SECRET_PROD" >> .env
+        echo "KEYCLOAK_CLIENT_ID=$KEYCLOAK_CLIENT_ID_PROD" >> .env
+        echo "KEYCLOAK_CLIENT_SECRET=$KEYCLOAK_CLIENT_SECRET_PROD" >> .env
+      else
+        echo "NEXTAUTH_URL=$NEXTAUTH_URL_TEST" >> .env
+        echo "NEXTAUTH_SECRET=$NEXTAUTH_SECRET_TEST" >> .env
+        echo "KEYCLOAK_CLIENT_ID=$KEYCLOAK_CLIENT_ID_TEST" >> .env
+        echo "KEYCLOAK_CLIENT_SECRET=$KEYCLOAK_CLIENT_SECRET_TEST" >> .env
+      fi
+      echo "KEYCLOAK_ISSUER=$KEYCLOAK_ISSUER" >> .env
+      echo "Contents of .env file:"
+      cat .env
       npm install
       npx next build
   artifacts:
     paths:
+      - internal_frontend/.env
       - internal_frontend/.next
       - internal_frontend/public
       - internal_frontend/package.json
diff --git a/internal_frontend/app/api/auth/[...nextauth]/route.ts b/internal_frontend/app/api/auth/[...nextauth]/route.ts
new file mode 100644
index 0000000..fe6ebe0
--- /dev/null
+++ b/internal_frontend/app/api/auth/[...nextauth]/route.ts
@@ -0,0 +1,5 @@
+import NextAuth from "next-auth";
+import {authOptions} from "@/lib/auth/authOptions";
+
+const handler = NextAuth(authOptions);
+export {handler as GET, handler as POST};
diff --git a/internal_frontend/app/apps/page.tsx b/internal_frontend/app/apps/page.tsx
new file mode 100644
index 0000000..a332282
--- /dev/null
+++ b/internal_frontend/app/apps/page.tsx
@@ -0,0 +1,7 @@
+export default function Home() {
+    return (
+        <div>
+            apps
+        </div>
+    );
+}
diff --git a/internal_frontend/app/demo/kanzlei/bilanzbuchhalter/page.tsx b/internal_frontend/app/demo/kanzlei/bilanzbuchhalter/page.tsx
new file mode 100644
index 0000000..c47a85d
--- /dev/null
+++ b/internal_frontend/app/demo/kanzlei/bilanzbuchhalter/page.tsx
@@ -0,0 +1,7 @@
+export default function Home() {
+    return (
+        <div>
+            Bilanzbuchhalter
+        </div>
+    );
+}
diff --git a/internal_frontend/app/demo/kanzlei/page.tsx b/internal_frontend/app/demo/kanzlei/page.tsx
new file mode 100644
index 0000000..7d015cf
--- /dev/null
+++ b/internal_frontend/app/demo/kanzlei/page.tsx
@@ -0,0 +1,7 @@
+export default function Home() {
+    return (
+        <div>
+            Kanzlei
+        </div>
+    );
+}
diff --git a/internal_frontend/app/demo/kanzlei/rechtsanwalt/page.tsx b/internal_frontend/app/demo/kanzlei/rechtsanwalt/page.tsx
new file mode 100644
index 0000000..cfda556
--- /dev/null
+++ b/internal_frontend/app/demo/kanzlei/rechtsanwalt/page.tsx
@@ -0,0 +1,7 @@
+export default function Home() {
+    return (
+        <div>
+            Rechtsanwalt
+        </div>
+    );
+}
diff --git a/internal_frontend/app/demo/kanzlei/steuer/page.tsx b/internal_frontend/app/demo/kanzlei/steuer/page.tsx
new file mode 100644
index 0000000..4ebdb39
--- /dev/null
+++ b/internal_frontend/app/demo/kanzlei/steuer/page.tsx
@@ -0,0 +1,7 @@
+export default function Home() {
+    return (
+        <div>
+            Steuer
+        </div>
+    );
+}
diff --git a/internal_frontend/app/demo/settings/page.tsx b/internal_frontend/app/demo/settings/page.tsx
new file mode 100644
index 0000000..3e25776
--- /dev/null
+++ b/internal_frontend/app/demo/settings/page.tsx
@@ -0,0 +1,10 @@
+import {SidebarGroupLabel} from "@/components/ui/sidebar";
+
+export default function Home() {
+    return (
+        <div>
+            <SidebarGroupLabel>Documents</SidebarGroupLabel>
+            Settings
+        </div>
+    );
+}
diff --git a/internal_frontend/app/globals.css b/internal_frontend/app/globals.css
index a2dc41e..4fced5d 100644
--- a/internal_frontend/app/globals.css
+++ b/internal_frontend/app/globals.css
@@ -1,26 +1,122 @@
 @import "tailwindcss";
+@import "tw-animate-css";
 
-:root {
-  --background: #ffffff;
-  --foreground: #171717;
-}
+@custom-variant dark (&:is(.dark *));
 
 @theme inline {
   --color-background: var(--background);
   --color-foreground: var(--foreground);
   --font-sans: var(--font-geist-sans);
   --font-mono: var(--font-geist-mono);
+  --color-sidebar-ring: var(--sidebar-ring);
+  --color-sidebar-border: var(--sidebar-border);
+  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+  --color-sidebar-accent: var(--sidebar-accent);
+  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+  --color-sidebar-primary: var(--sidebar-primary);
+  --color-sidebar-foreground: var(--sidebar-foreground);
+  --color-sidebar: var(--sidebar);
+  --color-chart-5: var(--chart-5);
+  --color-chart-4: var(--chart-4);
+  --color-chart-3: var(--chart-3);
+  --color-chart-2: var(--chart-2);
+  --color-chart-1: var(--chart-1);
+  --color-ring: var(--ring);
+  --color-input: var(--input);
+  --color-border: var(--border);
+  --color-destructive: var(--destructive);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-accent: var(--accent);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-muted: var(--muted);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-secondary: var(--secondary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-primary: var(--primary);
+  --color-popover-foreground: var(--popover-foreground);
+  --color-popover: var(--popover);
+  --color-card-foreground: var(--card-foreground);
+  --color-card: var(--card);
+  --radius-sm: calc(var(--radius) - 4px);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) + 4px);
 }
 
-@media (prefers-color-scheme: dark) {
-  :root {
-    --background: #0a0a0a;
-    --foreground: #ededed;
+:root {
+  --radius: 0.625rem;
+  --background: oklch(1 0 0);
+  --foreground: oklch(0.13 0.028 261.692);
+  --card: oklch(1 0 0);
+  --card-foreground: oklch(0.13 0.028 261.692);
+  --popover: oklch(1 0 0);
+  --popover-foreground: oklch(0.13 0.028 261.692);
+  --primary: oklch(0.21 0.034 264.665);
+  --primary-foreground: oklch(0.985 0.002 247.839);
+  --secondary: oklch(0.967 0.003 264.542);
+  --secondary-foreground: oklch(0.21 0.034 264.665);
+  --muted: oklch(0.967 0.003 264.542);
+  --muted-foreground: oklch(0.551 0.027 264.364);
+  --accent: oklch(0.967 0.003 264.542);
+  --accent-foreground: oklch(0.21 0.034 264.665);
+  --destructive: oklch(0.577 0.245 27.325);
+  --border: oklch(0.928 0.006 264.531);
+  --input: oklch(0.928 0.006 264.531);
+  --ring: oklch(0.707 0.022 261.325);
+  --chart-1: oklch(0.646 0.222 41.116);
+  --chart-2: oklch(0.6 0.118 184.704);
+  --chart-3: oklch(0.398 0.07 227.392);
+  --chart-4: oklch(0.828 0.189 84.429);
+  --chart-5: oklch(0.769 0.188 70.08);
+  --sidebar: oklch(0.985 0.002 247.839);
+  --sidebar-foreground: oklch(0.13 0.028 261.692);
+  --sidebar-primary: oklch(0.21 0.034 264.665);
+  --sidebar-primary-foreground: oklch(0.985 0.002 247.839);
+  --sidebar-accent: oklch(0.967 0.003 264.542);
+  --sidebar-accent-foreground: oklch(0.21 0.034 264.665);
+  --sidebar-border: oklch(0.928 0.006 264.531);
+  --sidebar-ring: oklch(0.707 0.022 261.325);
+}
+
+.dark {
+  --background: oklch(0.13 0.028 261.692);
+  --foreground: oklch(0.985 0.002 247.839);
+  --card: oklch(0.21 0.034 264.665);
+  --card-foreground: oklch(0.985 0.002 247.839);
+  --popover: oklch(0.21 0.034 264.665);
+  --popover-foreground: oklch(0.985 0.002 247.839);
+  --primary: oklch(0.928 0.006 264.531);
+  --primary-foreground: oklch(0.21 0.034 264.665);
+  --secondary: oklch(0.278 0.033 256.848);
+  --secondary-foreground: oklch(0.985 0.002 247.839);
+  --muted: oklch(0.278 0.033 256.848);
+  --muted-foreground: oklch(0.707 0.022 261.325);
+  --accent: oklch(0.278 0.033 256.848);
+  --accent-foreground: oklch(0.985 0.002 247.839);
+  --destructive: oklch(0.704 0.191 22.216);
+  --border: oklch(1 0 0 / 10%);
+  --input: oklch(1 0 0 / 15%);
+  --ring: oklch(0.551 0.027 264.364);
+  --chart-1: oklch(0.488 0.243 264.376);
+  --chart-2: oklch(0.696 0.17 162.48);
+  --chart-3: oklch(0.769 0.188 70.08);
+  --chart-4: oklch(0.627 0.265 303.9);
+  --chart-5: oklch(0.645 0.246 16.439);
+  --sidebar: oklch(0.21 0.034 264.665);
+  --sidebar-foreground: oklch(0.985 0.002 247.839);
+  --sidebar-primary: oklch(0.488 0.243 264.376);
+  --sidebar-primary-foreground: oklch(0.985 0.002 247.839);
+  --sidebar-accent: oklch(0.278 0.033 256.848);
+  --sidebar-accent-foreground: oklch(0.985 0.002 247.839);
+  --sidebar-border: oklch(1 0 0 / 10%);
+  --sidebar-ring: oklch(0.551 0.027 264.364);
+}
+
+@layer base {
+  * {
+    @apply border-border outline-ring/50;
+  }
+  body {
+    @apply bg-background text-foreground;
   }
 }
-
-body {
-  background: var(--background);
-  color: var(--foreground);
-  font-family: Arial, Helvetica, sans-serif;
-}
diff --git a/internal_frontend/app/layout.tsx b/internal_frontend/app/layout.tsx
index f7fa87e..0063488 100644
--- a/internal_frontend/app/layout.tsx
+++ b/internal_frontend/app/layout.tsx
@@ -1,34 +1,68 @@
-import type { Metadata } from "next";
-import { Geist, Geist_Mono } from "next/font/google";
+import type {Metadata} from "next";
 import "./globals.css";
-
-const geistSans = Geist({
-  variable: "--font-geist-sans",
-  subsets: ["latin"],
-});
-
-const geistMono = Geist_Mono({
-  variable: "--font-geist-mono",
-  subsets: ["latin"],
-});
+import {ThemeProvider} from "@/components/theme-provider";
+import {SidebarInset, SidebarProvider, SidebarTrigger} from "@/components/ui/sidebar";
+import {AppSidebar} from "@/components/app-sidebar";
+import React from "react";
+import {Separator} from "@/components/ui/separator";
+import {DynamicBreadcrumb} from "@/components/dynamic-breadcrumb";
+import {getServerSession} from "next-auth";
+import LoginScreen from "@/components/login-screen";
+import {authOptions} from "@/lib/auth/authOptions";
 
 export const metadata: Metadata = {
-  title: "Create Next App",
-  description: "Generated by create next app",
+    title: "Internal | Rhein Software",
+    description: "Internal Tools for Rhein Software Development",
 };
 
-export default function RootLayout({
-  children,
-}: Readonly<{
-  children: React.ReactNode;
+export default async function RootLayout({
+                                             children,
+                                         }: Readonly<{
+    children: React.ReactNode;
 }>) {
-  return (
-    <html lang="en">
-      <body
-        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
-      >
-        {children}
-      </body>
-    </html>
-  );
+    const session = await getServerSession(authOptions);
+
+    return (
+        <html lang="de" suppressHydrationWarning>
+        <body>
+        <ThemeProvider
+            attribute="class"
+            defaultTheme="system"
+            enableSystem
+            disableTransitionOnChange
+        >
+            {session?.accessToken ? (
+                <SidebarProvider
+                    style={
+                        {
+                            "--sidebar-width": "calc(var(--spacing) * 72)",
+                            "--header-height": "calc(var(--spacing) * 12)",
+                        } as React.CSSProperties
+                    }
+                >
+                    <AppSidebar/>
+                    <main>
+                        <SidebarInset>
+                            <header
+                                className="flex h-16 shrink-0 items-center gap-2 transition-[width,height] ease-linear group-has-data-[collapsible=icon]/sidebar-wrapper:h-12">
+                                <div className="flex items-center gap-2 px-4">
+                                    <SidebarTrigger className="-ml-1"/>
+                                    <Separator
+                                        orientation="vertical"
+                                        className="mr-2 data-[orientation=vertical]:h-4"
+                                    />
+                                    <DynamicBreadcrumb/>
+                                </div>
+                            </header>
+                        </SidebarInset>
+                        {children}
+                    </main>
+                </SidebarProvider>
+            ) : (
+                <LoginScreen/>
+            )}
+        </ThemeProvider>
+        </body>
+        </html>
+    );
 }
diff --git a/internal_frontend/components.json b/internal_frontend/components.json
new file mode 100644
index 0000000..8de3dce
--- /dev/null
+++ b/internal_frontend/components.json
@@ -0,0 +1,21 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": true,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "app/globals.css",
+    "baseColor": "gray",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "iconLibrary": "lucide"
+}
\ No newline at end of file
diff --git a/internal_frontend/components/app-sidebar.tsx b/internal_frontend/components/app-sidebar.tsx
new file mode 100644
index 0000000..279084a
--- /dev/null
+++ b/internal_frontend/components/app-sidebar.tsx
@@ -0,0 +1,173 @@
+import {
+    AppWindowIcon,
+    ChevronUp,
+    ChevronRight,
+    Home,
+    Scale,
+    User2,
+    Settings
+} from "lucide-react";
+
+import {
+    Sidebar,
+    SidebarContent,
+    SidebarFooter,
+    SidebarGroup,
+    SidebarGroupContent,
+    SidebarGroupLabel,
+    SidebarHeader,
+    SidebarMenu,
+    SidebarMenuButton,
+    SidebarMenuItem,
+    SidebarMenuSub,
+    SidebarMenuSubItem,
+    SidebarMenuSubButton,
+} from "@/components/ui/sidebar";
+
+import {
+    DropdownMenu,
+    DropdownMenuContent,
+    DropdownMenuItem,
+    DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+
+import {
+    Collapsible,
+    CollapsibleTrigger,
+    CollapsibleContent,
+} from "@/components/ui/collapsible";
+
+const rheinItems = [
+    {
+        title: "Dashboard",
+        url: "/",
+        icon: Home,
+    },
+    {
+        title: "Apps",
+        url: "/apps",
+        icon: AppWindowIcon,
+    },
+];
+
+export function AppSidebar() {
+    return (
+        <Sidebar>
+            <SidebarHeader/>
+            <SidebarContent>
+                {/* Rhein section */}
+                <SidebarGroup>
+                    <SidebarGroupLabel>Rhein Software Development</SidebarGroupLabel>
+                    <SidebarGroupContent>
+                        <SidebarMenu className="flex flex-col gap-y-1">
+                            {rheinItems.map((item) => (
+                                <SidebarMenuItem key={item.title}>
+                                    <SidebarMenuButton
+                                        asChild
+                                        className="hover:bg-accent hover:text-accent-foreground"
+                                    >
+                                        <a href={item.url}>
+                                            <item.icon/>
+                                            <span>{item.title}</span>
+                                        </a>
+                                    </SidebarMenuButton>
+                                </SidebarMenuItem>
+                            ))}
+                        </SidebarMenu>
+                    </SidebarGroupContent>
+                </SidebarGroup>
+
+                {/* Demos section */}
+                <SidebarGroup>
+                    <SidebarGroupLabel>Demos</SidebarGroupLabel>
+                    <SidebarGroupContent>
+                        <SidebarMenu className="flex flex-col gap-y-1">
+                            <SidebarMenu className="flex flex-col gap-y-1">
+                                <SidebarMenuItem key="demo-settings">
+                                    <SidebarMenuButton
+                                        asChild
+                                        className="hover:bg-accent hover:text-accent-foreground"
+                                    >
+
+                                        <a href="/demo/settings">
+                                            <Settings/>
+                                            <span>Demo Settings</span>
+                                        </a>
+                                    </SidebarMenuButton>
+                                </SidebarMenuItem>
+                            </SidebarMenu>
+                        </SidebarMenu>
+                        <SidebarMenu className="flex flex-col gap-y-1">
+                            <Collapsible className="group/collapsible">
+                                <SidebarMenuItem className="flex items-center">
+                                    <CollapsibleTrigger asChild>
+                                        <SidebarMenuButton
+                                            className="flex items-center w-full hover:bg-accent hover:text-accent-foreground">
+                                            <Scale/>
+                                            <span className="flex-1">Kanzlei</span>
+                                            <ChevronRight
+                                                className="transition-transform group-data-[state=open]/collapsible:rotate-90"
+                                                size={16}
+                                            />
+                                        </SidebarMenuButton>
+                                    </CollapsibleTrigger>
+                                </SidebarMenuItem>
+
+                                <CollapsibleContent>
+                                    <SidebarMenuSub className="ml-4 border-l border-border pl-4 flex flex-col gap-y-1">
+                                        <SidebarMenuSubItem>
+                                            <SidebarMenuSubButton href="/demo/kanzlei/steuer">
+                                                Steuer
+                                            </SidebarMenuSubButton>
+                                        </SidebarMenuSubItem>
+                                        <SidebarMenuSubItem>
+                                            <SidebarMenuSubButton href="/demo/kanzlei/rechtsanwalt">
+                                                Rechtsanwalt
+                                            </SidebarMenuSubButton>
+                                        </SidebarMenuSubItem>
+                                        <SidebarMenuSubItem>
+                                            <SidebarMenuSubButton href="/demo/kanzlei/bilanzbuchhalter">
+                                                Bilanzbuchhalter
+                                            </SidebarMenuSubButton>
+                                        </SidebarMenuSubItem>
+                                    </SidebarMenuSub>
+                                </CollapsibleContent>
+                            </Collapsible>
+                        </SidebarMenu>
+                    </SidebarGroupContent>
+                </SidebarGroup>
+            </SidebarContent>
+
+            {/* Footer with user dropdown */}
+            <SidebarFooter>
+                <SidebarMenu>
+                    <SidebarMenuItem>
+                        <DropdownMenu>
+                            <DropdownMenuTrigger asChild>
+                                <SidebarMenuButton className="hover:bg-accent hover:text-accent-foreground">
+                                    <User2/>
+                                    Username
+                                    <ChevronUp className="ml-auto"/>
+                                </SidebarMenuButton>
+                            </DropdownMenuTrigger>
+                            <DropdownMenuContent
+                                side="top"
+                                className="w-[--radix-popper-anchor-width]"
+                            >
+                                <DropdownMenuItem>
+                                    <span>Account</span>
+                                </DropdownMenuItem>
+                                <DropdownMenuItem>
+                                    <span>Billing</span>
+                                </DropdownMenuItem>
+                                <DropdownMenuItem>
+                                    <span>Sign out</span>
+                                </DropdownMenuItem>
+                            </DropdownMenuContent>
+                        </DropdownMenu>
+                    </SidebarMenuItem>
+                </SidebarMenu>
+            </SidebarFooter>
+        </Sidebar>
+    );
+}
diff --git a/internal_frontend/components/dynamic-breadcrumb.tsx b/internal_frontend/components/dynamic-breadcrumb.tsx
new file mode 100644
index 0000000..623bb49
--- /dev/null
+++ b/internal_frontend/components/dynamic-breadcrumb.tsx
@@ -0,0 +1,42 @@
+// components/dynamic-breadcrumb.tsx
+'use client';
+
+import {usePathname} from 'next/navigation';
+import {
+    Breadcrumb,
+    BreadcrumbItem,
+    BreadcrumbLink,
+    BreadcrumbList,
+    BreadcrumbPage,
+    BreadcrumbSeparator,
+} from "@/components/ui/breadcrumb";
+import React from 'react';
+import {getBreadcrumbs} from "@/utils/BreadcrumbUtils";
+
+export function DynamicBreadcrumb() {
+    const pathname = usePathname();
+    const breadcrumbs = getBreadcrumbs(pathname);
+
+    return (
+        <Breadcrumb>
+            <BreadcrumbList>
+                {breadcrumbs.map((breadcrumb, index) => (
+                    <React.Fragment key={breadcrumb.href}>
+                        <BreadcrumbItem className="hidden md:block">
+                            {breadcrumb.isCurrentPage ? (
+                                <BreadcrumbPage>{breadcrumb.label}</BreadcrumbPage>
+                            ) : (
+                                <BreadcrumbLink href={breadcrumb.href}>
+                                    {breadcrumb.label}
+                                </BreadcrumbLink>
+                            )}
+                        </BreadcrumbItem>
+                        {index < breadcrumbs.length - 1 && (
+                            <BreadcrumbSeparator className="hidden md:block"/>
+                        )}
+                    </React.Fragment>
+                ))}
+            </BreadcrumbList>
+        </Breadcrumb>
+    );
+}
\ No newline at end of file
diff --git a/internal_frontend/components/login-screen.tsx b/internal_frontend/components/login-screen.tsx
new file mode 100644
index 0000000..8467ae4
--- /dev/null
+++ b/internal_frontend/components/login-screen.tsx
@@ -0,0 +1,22 @@
+'use client';
+
+import {useEffect} from "react";
+import {signIn} from "next-auth/react";
+import {Loader2} from "lucide-react"; // optional loading spinner
+import {cn} from "@/lib/utils"; // optional: your className utility
+
+export default function LoginScreen() {
+    useEffect(() => {
+        // Immediately redirect to Keycloak
+        signIn("keycloak");
+    }, []);
+
+    return (
+        <div className="flex min-h-screen items-center justify-center bg-muted">
+            <div className="flex flex-col items-center gap-2 text-center">
+                <Loader2 className={cn("h-6 w-6 animate-spin text-muted-foreground")}/>
+                <p className="text-sm text-muted-foreground">Leite zur Anmeldung weiter ...</p>
+            </div>
+        </div>
+    );
+}
diff --git a/internal_frontend/components/theme-provider.tsx b/internal_frontend/components/theme-provider.tsx
new file mode 100644
index 0000000..307725e
--- /dev/null
+++ b/internal_frontend/components/theme-provider.tsx
@@ -0,0 +1,11 @@
+"use client"
+
+import * as React from "react"
+import {ThemeProvider as NextThemesProvider} from "next-themes"
+
+export function ThemeProvider({
+                                  children,
+                                  ...props
+                              }: Readonly<React.ComponentProps<typeof NextThemesProvider>>) {
+    return <NextThemesProvider {...props}>{children}</NextThemesProvider>
+}
\ No newline at end of file
diff --git a/internal_frontend/components/ui/breadcrumb.tsx b/internal_frontend/components/ui/breadcrumb.tsx
new file mode 100644
index 0000000..eb88f32
--- /dev/null
+++ b/internal_frontend/components/ui/breadcrumb.tsx
@@ -0,0 +1,109 @@
+import * as React from "react"
+import { Slot } from "@radix-ui/react-slot"
+import { ChevronRight, MoreHorizontal } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+function Breadcrumb({ ...props }: React.ComponentProps<"nav">) {
+  return <nav aria-label="breadcrumb" data-slot="breadcrumb" {...props} />
+}
+
+function BreadcrumbList({ className, ...props }: React.ComponentProps<"ol">) {
+  return (
+    <ol
+      data-slot="breadcrumb-list"
+      className={cn(
+        "text-muted-foreground flex flex-wrap items-center gap-1.5 text-sm break-words sm:gap-2.5",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbItem({ className, ...props }: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="breadcrumb-item"
+      className={cn("inline-flex items-center gap-1.5", className)}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbLink({
+  asChild,
+  className,
+  ...props
+}: React.ComponentProps<"a"> & {
+  asChild?: boolean
+}) {
+  const Comp = asChild ? Slot : "a"
+
+  return (
+    <Comp
+      data-slot="breadcrumb-link"
+      className={cn("hover:text-foreground transition-colors", className)}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbPage({ className, ...props }: React.ComponentProps<"span">) {
+  return (
+    <span
+      data-slot="breadcrumb-page"
+      role="link"
+      aria-disabled="true"
+      aria-current="page"
+      className={cn("text-foreground font-normal", className)}
+      {...props}
+    />
+  )
+}
+
+function BreadcrumbSeparator({
+  children,
+  className,
+  ...props
+}: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="breadcrumb-separator"
+      role="presentation"
+      aria-hidden="true"
+      className={cn("[&>svg]:size-3.5", className)}
+      {...props}
+    >
+      {children ?? <ChevronRight />}
+    </li>
+  )
+}
+
+function BreadcrumbEllipsis({
+  className,
+  ...props
+}: React.ComponentProps<"span">) {
+  return (
+    <span
+      data-slot="breadcrumb-ellipsis"
+      role="presentation"
+      aria-hidden="true"
+      className={cn("flex size-9 items-center justify-center", className)}
+      {...props}
+    >
+      <MoreHorizontal className="size-4" />
+      <span className="sr-only">More</span>
+    </span>
+  )
+}
+
+export {
+  Breadcrumb,
+  BreadcrumbList,
+  BreadcrumbItem,
+  BreadcrumbLink,
+  BreadcrumbPage,
+  BreadcrumbSeparator,
+  BreadcrumbEllipsis,
+}
diff --git a/internal_frontend/components/ui/button.tsx b/internal_frontend/components/ui/button.tsx
new file mode 100644
index 0000000..a2df8dc
--- /dev/null
+++ b/internal_frontend/components/ui/button.tsx
@@ -0,0 +1,59 @@
+import * as React from "react"
+import { Slot } from "@radix-ui/react-slot"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+  {
+    variants: {
+      variant: {
+        default:
+          "bg-primary text-primary-foreground shadow-xs hover:bg-primary/90",
+        destructive:
+          "bg-destructive text-white shadow-xs hover:bg-destructive/90 focus-visible:ring-destructive/20 dark:focus-visible:ring-destructive/40 dark:bg-destructive/60",
+        outline:
+          "border bg-background shadow-xs hover:bg-accent hover:text-accent-foreground dark:bg-input/30 dark:border-input dark:hover:bg-input/50",
+        secondary:
+          "bg-secondary text-secondary-foreground shadow-xs hover:bg-secondary/80",
+        ghost:
+          "hover:bg-accent hover:text-accent-foreground dark:hover:bg-accent/50",
+        link: "text-primary underline-offset-4 hover:underline",
+      },
+      size: {
+        default: "h-9 px-4 py-2 has-[>svg]:px-3",
+        sm: "h-8 rounded-md gap-1.5 px-3 has-[>svg]:px-2.5",
+        lg: "h-10 rounded-md px-6 has-[>svg]:px-4",
+        icon: "size-9",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+function Button({
+  className,
+  variant,
+  size,
+  asChild = false,
+  ...props
+}: React.ComponentProps<"button"> &
+  VariantProps<typeof buttonVariants> & {
+    asChild?: boolean
+  }) {
+  const Comp = asChild ? Slot : "button"
+
+  return (
+    <Comp
+      data-slot="button"
+      className={cn(buttonVariants({ variant, size, className }))}
+      {...props}
+    />
+  )
+}
+
+export { Button, buttonVariants }
diff --git a/internal_frontend/components/ui/card.tsx b/internal_frontend/components/ui/card.tsx
new file mode 100644
index 0000000..d05bbc6
--- /dev/null
+++ b/internal_frontend/components/ui/card.tsx
@@ -0,0 +1,92 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Card({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card"
+      className={cn(
+        "bg-card text-card-foreground flex flex-col gap-6 rounded-xl border py-6 shadow-sm",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-header"
+      className={cn(
+        "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-1.5 px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardTitle({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-title"
+      className={cn("leading-none font-semibold", className)}
+      {...props}
+    />
+  )
+}
+
+function CardDescription({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-description"
+      className={cn("text-muted-foreground text-sm", className)}
+      {...props}
+    />
+  )
+}
+
+function CardAction({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-action"
+      className={cn(
+        "col-start-2 row-span-2 row-start-1 self-start justify-self-end",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardContent({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-content"
+      className={cn("px-6", className)}
+      {...props}
+    />
+  )
+}
+
+function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-footer"
+      className={cn("flex items-center px-6 [.border-t]:pt-6", className)}
+      {...props}
+    />
+  )
+}
+
+export {
+  Card,
+  CardHeader,
+  CardFooter,
+  CardTitle,
+  CardAction,
+  CardDescription,
+  CardContent,
+}
diff --git a/internal_frontend/components/ui/collapsible.tsx b/internal_frontend/components/ui/collapsible.tsx
new file mode 100644
index 0000000..ae9fad0
--- /dev/null
+++ b/internal_frontend/components/ui/collapsible.tsx
@@ -0,0 +1,33 @@
+"use client"
+
+import * as CollapsiblePrimitive from "@radix-ui/react-collapsible"
+
+function Collapsible({
+  ...props
+}: React.ComponentProps<typeof CollapsiblePrimitive.Root>) {
+  return <CollapsiblePrimitive.Root data-slot="collapsible" {...props} />
+}
+
+function CollapsibleTrigger({
+  ...props
+}: React.ComponentProps<typeof CollapsiblePrimitive.CollapsibleTrigger>) {
+  return (
+    <CollapsiblePrimitive.CollapsibleTrigger
+      data-slot="collapsible-trigger"
+      {...props}
+    />
+  )
+}
+
+function CollapsibleContent({
+  ...props
+}: React.ComponentProps<typeof CollapsiblePrimitive.CollapsibleContent>) {
+  return (
+    <CollapsiblePrimitive.CollapsibleContent
+      data-slot="collapsible-content"
+      {...props}
+    />
+  )
+}
+
+export { Collapsible, CollapsibleTrigger, CollapsibleContent }
diff --git a/internal_frontend/components/ui/dropdown-menu.tsx b/internal_frontend/components/ui/dropdown-menu.tsx
new file mode 100644
index 0000000..ec51e9c
--- /dev/null
+++ b/internal_frontend/components/ui/dropdown-menu.tsx
@@ -0,0 +1,257 @@
+"use client"
+
+import * as React from "react"
+import * as DropdownMenuPrimitive from "@radix-ui/react-dropdown-menu"
+import { CheckIcon, ChevronRightIcon, CircleIcon } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+function DropdownMenu({
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Root>) {
+  return <DropdownMenuPrimitive.Root data-slot="dropdown-menu" {...props} />
+}
+
+function DropdownMenuPortal({
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Portal>) {
+  return (
+    <DropdownMenuPrimitive.Portal data-slot="dropdown-menu-portal" {...props} />
+  )
+}
+
+function DropdownMenuTrigger({
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Trigger>) {
+  return (
+    <DropdownMenuPrimitive.Trigger
+      data-slot="dropdown-menu-trigger"
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuContent({
+  className,
+  sideOffset = 4,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Content>) {
+  return (
+    <DropdownMenuPrimitive.Portal>
+      <DropdownMenuPrimitive.Content
+        data-slot="dropdown-menu-content"
+        sideOffset={sideOffset}
+        className={cn(
+          "bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 z-50 max-h-(--radix-dropdown-menu-content-available-height) min-w-[8rem] origin-(--radix-dropdown-menu-content-transform-origin) overflow-x-hidden overflow-y-auto rounded-md border p-1 shadow-md",
+          className
+        )}
+        {...props}
+      />
+    </DropdownMenuPrimitive.Portal>
+  )
+}
+
+function DropdownMenuGroup({
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Group>) {
+  return (
+    <DropdownMenuPrimitive.Group data-slot="dropdown-menu-group" {...props} />
+  )
+}
+
+function DropdownMenuItem({
+  className,
+  inset,
+  variant = "default",
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Item> & {
+  inset?: boolean
+  variant?: "default" | "destructive"
+}) {
+  return (
+    <DropdownMenuPrimitive.Item
+      data-slot="dropdown-menu-item"
+      data-inset={inset}
+      data-variant={variant}
+      className={cn(
+        "focus:bg-accent focus:text-accent-foreground data-[variant=destructive]:text-destructive data-[variant=destructive]:focus:bg-destructive/10 dark:data-[variant=destructive]:focus:bg-destructive/20 data-[variant=destructive]:focus:text-destructive data-[variant=destructive]:*:[svg]:!text-destructive [&_svg:not([class*='text-'])]:text-muted-foreground relative flex cursor-default items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-hidden select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 data-[inset]:pl-8 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuCheckboxItem({
+  className,
+  children,
+  checked,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.CheckboxItem>) {
+  return (
+    <DropdownMenuPrimitive.CheckboxItem
+      data-slot="dropdown-menu-checkbox-item"
+      className={cn(
+        "focus:bg-accent focus:text-accent-foreground relative flex cursor-default items-center gap-2 rounded-sm py-1.5 pr-2 pl-8 text-sm outline-hidden select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className
+      )}
+      checked={checked}
+      {...props}
+    >
+      <span className="pointer-events-none absolute left-2 flex size-3.5 items-center justify-center">
+        <DropdownMenuPrimitive.ItemIndicator>
+          <CheckIcon className="size-4" />
+        </DropdownMenuPrimitive.ItemIndicator>
+      </span>
+      {children}
+    </DropdownMenuPrimitive.CheckboxItem>
+  )
+}
+
+function DropdownMenuRadioGroup({
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.RadioGroup>) {
+  return (
+    <DropdownMenuPrimitive.RadioGroup
+      data-slot="dropdown-menu-radio-group"
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuRadioItem({
+  className,
+  children,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.RadioItem>) {
+  return (
+    <DropdownMenuPrimitive.RadioItem
+      data-slot="dropdown-menu-radio-item"
+      className={cn(
+        "focus:bg-accent focus:text-accent-foreground relative flex cursor-default items-center gap-2 rounded-sm py-1.5 pr-2 pl-8 text-sm outline-hidden select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className
+      )}
+      {...props}
+    >
+      <span className="pointer-events-none absolute left-2 flex size-3.5 items-center justify-center">
+        <DropdownMenuPrimitive.ItemIndicator>
+          <CircleIcon className="size-2 fill-current" />
+        </DropdownMenuPrimitive.ItemIndicator>
+      </span>
+      {children}
+    </DropdownMenuPrimitive.RadioItem>
+  )
+}
+
+function DropdownMenuLabel({
+  className,
+  inset,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Label> & {
+  inset?: boolean
+}) {
+  return (
+    <DropdownMenuPrimitive.Label
+      data-slot="dropdown-menu-label"
+      data-inset={inset}
+      className={cn(
+        "px-2 py-1.5 text-sm font-medium data-[inset]:pl-8",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuSeparator({
+  className,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Separator>) {
+  return (
+    <DropdownMenuPrimitive.Separator
+      data-slot="dropdown-menu-separator"
+      className={cn("bg-border -mx-1 my-1 h-px", className)}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuShortcut({
+  className,
+  ...props
+}: React.ComponentProps<"span">) {
+  return (
+    <span
+      data-slot="dropdown-menu-shortcut"
+      className={cn(
+        "text-muted-foreground ml-auto text-xs tracking-widest",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuSub({
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.Sub>) {
+  return <DropdownMenuPrimitive.Sub data-slot="dropdown-menu-sub" {...props} />
+}
+
+function DropdownMenuSubTrigger({
+  className,
+  inset,
+  children,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.SubTrigger> & {
+  inset?: boolean
+}) {
+  return (
+    <DropdownMenuPrimitive.SubTrigger
+      data-slot="dropdown-menu-sub-trigger"
+      data-inset={inset}
+      className={cn(
+        "focus:bg-accent focus:text-accent-foreground data-[state=open]:bg-accent data-[state=open]:text-accent-foreground flex cursor-default items-center rounded-sm px-2 py-1.5 text-sm outline-hidden select-none data-[inset]:pl-8",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      <ChevronRightIcon className="ml-auto size-4" />
+    </DropdownMenuPrimitive.SubTrigger>
+  )
+}
+
+function DropdownMenuSubContent({
+  className,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuPrimitive.SubContent>) {
+  return (
+    <DropdownMenuPrimitive.SubContent
+      data-slot="dropdown-menu-sub-content"
+      className={cn(
+        "bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 z-50 min-w-[8rem] origin-(--radix-dropdown-menu-content-transform-origin) overflow-hidden rounded-md border p-1 shadow-lg",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  DropdownMenu,
+  DropdownMenuPortal,
+  DropdownMenuTrigger,
+  DropdownMenuContent,
+  DropdownMenuGroup,
+  DropdownMenuLabel,
+  DropdownMenuItem,
+  DropdownMenuCheckboxItem,
+  DropdownMenuRadioGroup,
+  DropdownMenuRadioItem,
+  DropdownMenuSeparator,
+  DropdownMenuShortcut,
+  DropdownMenuSub,
+  DropdownMenuSubTrigger,
+  DropdownMenuSubContent,
+}
diff --git a/internal_frontend/components/ui/input-otp.tsx b/internal_frontend/components/ui/input-otp.tsx
new file mode 100644
index 0000000..614f70e
--- /dev/null
+++ b/internal_frontend/components/ui/input-otp.tsx
@@ -0,0 +1,77 @@
+"use client"
+
+import * as React from "react"
+import { OTPInput, OTPInputContext } from "input-otp"
+import { MinusIcon } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+function InputOTP({
+  className,
+  containerClassName,
+  ...props
+}: React.ComponentProps<typeof OTPInput> & {
+  containerClassName?: string
+}) {
+  return (
+    <OTPInput
+      data-slot="input-otp"
+      containerClassName={cn(
+        "flex items-center gap-2 has-disabled:opacity-50",
+        containerClassName
+      )}
+      className={cn("disabled:cursor-not-allowed", className)}
+      {...props}
+    />
+  )
+}
+
+function InputOTPGroup({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="input-otp-group"
+      className={cn("flex items-center", className)}
+      {...props}
+    />
+  )
+}
+
+function InputOTPSlot({
+  index,
+  className,
+  ...props
+}: React.ComponentProps<"div"> & {
+  index: number
+}) {
+  const inputOTPContext = React.useContext(OTPInputContext)
+  const { char, hasFakeCaret, isActive } = inputOTPContext?.slots[index] ?? {}
+
+  return (
+    <div
+      data-slot="input-otp-slot"
+      data-active={isActive}
+      className={cn(
+        "data-[active=true]:border-ring data-[active=true]:ring-ring/50 data-[active=true]:aria-invalid:ring-destructive/20 dark:data-[active=true]:aria-invalid:ring-destructive/40 aria-invalid:border-destructive data-[active=true]:aria-invalid:border-destructive dark:bg-input/30 border-input relative flex h-9 w-9 items-center justify-center border-y border-r text-sm shadow-xs transition-all outline-none first:rounded-l-md first:border-l last:rounded-r-md data-[active=true]:z-10 data-[active=true]:ring-[3px]",
+        className
+      )}
+      {...props}
+    >
+      {char}
+      {hasFakeCaret && (
+        <div className="pointer-events-none absolute inset-0 flex items-center justify-center">
+          <div className="animate-caret-blink bg-foreground h-4 w-px duration-1000" />
+        </div>
+      )}
+    </div>
+  )
+}
+
+function InputOTPSeparator({ ...props }: React.ComponentProps<"div">) {
+  return (
+    <div data-slot="input-otp-separator" role="separator" {...props}>
+      <MinusIcon />
+    </div>
+  )
+}
+
+export { InputOTP, InputOTPGroup, InputOTPSlot, InputOTPSeparator }
diff --git a/internal_frontend/components/ui/input.tsx b/internal_frontend/components/ui/input.tsx
new file mode 100644
index 0000000..03295ca
--- /dev/null
+++ b/internal_frontend/components/ui/input.tsx
@@ -0,0 +1,21 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Input({ className, type, ...props }: React.ComponentProps<"input">) {
+  return (
+    <input
+      type={type}
+      data-slot="input"
+      className={cn(
+        "file:text-foreground placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 border-input flex h-9 w-full min-w-0 rounded-md border bg-transparent px-3 py-1 text-base shadow-xs transition-[color,box-shadow] outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        "focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px]",
+        "aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Input }
diff --git a/internal_frontend/components/ui/separator.tsx b/internal_frontend/components/ui/separator.tsx
new file mode 100644
index 0000000..275381c
--- /dev/null
+++ b/internal_frontend/components/ui/separator.tsx
@@ -0,0 +1,28 @@
+"use client"
+
+import * as React from "react"
+import * as SeparatorPrimitive from "@radix-ui/react-separator"
+
+import { cn } from "@/lib/utils"
+
+function Separator({
+  className,
+  orientation = "horizontal",
+  decorative = true,
+  ...props
+}: React.ComponentProps<typeof SeparatorPrimitive.Root>) {
+  return (
+    <SeparatorPrimitive.Root
+      data-slot="separator"
+      decorative={decorative}
+      orientation={orientation}
+      className={cn(
+        "bg-border shrink-0 data-[orientation=horizontal]:h-px data-[orientation=horizontal]:w-full data-[orientation=vertical]:h-full data-[orientation=vertical]:w-px",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Separator }
diff --git a/internal_frontend/components/ui/sheet.tsx b/internal_frontend/components/ui/sheet.tsx
new file mode 100644
index 0000000..84649ad
--- /dev/null
+++ b/internal_frontend/components/ui/sheet.tsx
@@ -0,0 +1,139 @@
+"use client"
+
+import * as React from "react"
+import * as SheetPrimitive from "@radix-ui/react-dialog"
+import { XIcon } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+function Sheet({ ...props }: React.ComponentProps<typeof SheetPrimitive.Root>) {
+  return <SheetPrimitive.Root data-slot="sheet" {...props} />
+}
+
+function SheetTrigger({
+  ...props
+}: React.ComponentProps<typeof SheetPrimitive.Trigger>) {
+  return <SheetPrimitive.Trigger data-slot="sheet-trigger" {...props} />
+}
+
+function SheetClose({
+  ...props
+}: React.ComponentProps<typeof SheetPrimitive.Close>) {
+  return <SheetPrimitive.Close data-slot="sheet-close" {...props} />
+}
+
+function SheetPortal({
+  ...props
+}: React.ComponentProps<typeof SheetPrimitive.Portal>) {
+  return <SheetPrimitive.Portal data-slot="sheet-portal" {...props} />
+}
+
+function SheetOverlay({
+  className,
+  ...props
+}: React.ComponentProps<typeof SheetPrimitive.Overlay>) {
+  return (
+    <SheetPrimitive.Overlay
+      data-slot="sheet-overlay"
+      className={cn(
+        "data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 fixed inset-0 z-50 bg-black/50",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SheetContent({
+  className,
+  children,
+  side = "right",
+  ...props
+}: React.ComponentProps<typeof SheetPrimitive.Content> & {
+  side?: "top" | "right" | "bottom" | "left"
+}) {
+  return (
+    <SheetPortal>
+      <SheetOverlay />
+      <SheetPrimitive.Content
+        data-slot="sheet-content"
+        className={cn(
+          "bg-background data-[state=open]:animate-in data-[state=closed]:animate-out fixed z-50 flex flex-col gap-4 shadow-lg transition ease-in-out data-[state=closed]:duration-300 data-[state=open]:duration-500",
+          side === "right" &&
+            "data-[state=closed]:slide-out-to-right data-[state=open]:slide-in-from-right inset-y-0 right-0 h-full w-3/4 border-l sm:max-w-sm",
+          side === "left" &&
+            "data-[state=closed]:slide-out-to-left data-[state=open]:slide-in-from-left inset-y-0 left-0 h-full w-3/4 border-r sm:max-w-sm",
+          side === "top" &&
+            "data-[state=closed]:slide-out-to-top data-[state=open]:slide-in-from-top inset-x-0 top-0 h-auto border-b",
+          side === "bottom" &&
+            "data-[state=closed]:slide-out-to-bottom data-[state=open]:slide-in-from-bottom inset-x-0 bottom-0 h-auto border-t",
+          className
+        )}
+        {...props}
+      >
+        {children}
+        <SheetPrimitive.Close className="ring-offset-background focus:ring-ring data-[state=open]:bg-secondary absolute top-4 right-4 rounded-xs opacity-70 transition-opacity hover:opacity-100 focus:ring-2 focus:ring-offset-2 focus:outline-hidden disabled:pointer-events-none">
+          <XIcon className="size-4" />
+          <span className="sr-only">Close</span>
+        </SheetPrimitive.Close>
+      </SheetPrimitive.Content>
+    </SheetPortal>
+  )
+}
+
+function SheetHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sheet-header"
+      className={cn("flex flex-col gap-1.5 p-4", className)}
+      {...props}
+    />
+  )
+}
+
+function SheetFooter({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sheet-footer"
+      className={cn("mt-auto flex flex-col gap-2 p-4", className)}
+      {...props}
+    />
+  )
+}
+
+function SheetTitle({
+  className,
+  ...props
+}: React.ComponentProps<typeof SheetPrimitive.Title>) {
+  return (
+    <SheetPrimitive.Title
+      data-slot="sheet-title"
+      className={cn("text-foreground font-semibold", className)}
+      {...props}
+    />
+  )
+}
+
+function SheetDescription({
+  className,
+  ...props
+}: React.ComponentProps<typeof SheetPrimitive.Description>) {
+  return (
+    <SheetPrimitive.Description
+      data-slot="sheet-description"
+      className={cn("text-muted-foreground text-sm", className)}
+      {...props}
+    />
+  )
+}
+
+export {
+  Sheet,
+  SheetTrigger,
+  SheetClose,
+  SheetContent,
+  SheetHeader,
+  SheetFooter,
+  SheetTitle,
+  SheetDescription,
+}
diff --git a/internal_frontend/components/ui/sidebar.tsx b/internal_frontend/components/ui/sidebar.tsx
new file mode 100644
index 0000000..1ee5a45
--- /dev/null
+++ b/internal_frontend/components/ui/sidebar.tsx
@@ -0,0 +1,726 @@
+"use client"
+
+import * as React from "react"
+import { Slot } from "@radix-ui/react-slot"
+import { cva, VariantProps } from "class-variance-authority"
+import { PanelLeftIcon } from "lucide-react"
+
+import { useIsMobile } from "@/hooks/use-mobile"
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+import { Input } from "@/components/ui/input"
+import { Separator } from "@/components/ui/separator"
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetHeader,
+  SheetTitle,
+} from "@/components/ui/sheet"
+import { Skeleton } from "@/components/ui/skeleton"
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from "@/components/ui/tooltip"
+
+const SIDEBAR_COOKIE_NAME = "sidebar_state"
+const SIDEBAR_COOKIE_MAX_AGE = 60 * 60 * 24 * 7
+const SIDEBAR_WIDTH = "16rem"
+const SIDEBAR_WIDTH_MOBILE = "18rem"
+const SIDEBAR_WIDTH_ICON = "3rem"
+const SIDEBAR_KEYBOARD_SHORTCUT = "b"
+
+type SidebarContextProps = {
+  state: "expanded" | "collapsed"
+  open: boolean
+  setOpen: (open: boolean) => void
+  openMobile: boolean
+  setOpenMobile: (open: boolean) => void
+  isMobile: boolean
+  toggleSidebar: () => void
+}
+
+const SidebarContext = React.createContext<SidebarContextProps | null>(null)
+
+function useSidebar() {
+  const context = React.useContext(SidebarContext)
+  if (!context) {
+    throw new Error("useSidebar must be used within a SidebarProvider.")
+  }
+
+  return context
+}
+
+function SidebarProvider({
+  defaultOpen = true,
+  open: openProp,
+  onOpenChange: setOpenProp,
+  className,
+  style,
+  children,
+  ...props
+}: React.ComponentProps<"div"> & {
+  defaultOpen?: boolean
+  open?: boolean
+  onOpenChange?: (open: boolean) => void
+}) {
+  const isMobile = useIsMobile()
+  const [openMobile, setOpenMobile] = React.useState(false)
+
+  // This is the internal state of the sidebar.
+  // We use openProp and setOpenProp for control from outside the component.
+  const [_open, _setOpen] = React.useState(defaultOpen)
+  const open = openProp ?? _open
+  const setOpen = React.useCallback(
+    (value: boolean | ((value: boolean) => boolean)) => {
+      const openState = typeof value === "function" ? value(open) : value
+      if (setOpenProp) {
+        setOpenProp(openState)
+      } else {
+        _setOpen(openState)
+      }
+
+      // This sets the cookie to keep the sidebar state.
+      document.cookie = `${SIDEBAR_COOKIE_NAME}=${openState}; path=/; max-age=${SIDEBAR_COOKIE_MAX_AGE}`
+    },
+    [setOpenProp, open]
+  )
+
+  // Helper to toggle the sidebar.
+  const toggleSidebar = React.useCallback(() => {
+    return isMobile ? setOpenMobile((open) => !open) : setOpen((open) => !open)
+  }, [isMobile, setOpen, setOpenMobile])
+
+  // Adds a keyboard shortcut to toggle the sidebar.
+  React.useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (
+        event.key === SIDEBAR_KEYBOARD_SHORTCUT &&
+        (event.metaKey || event.ctrlKey)
+      ) {
+        event.preventDefault()
+        toggleSidebar()
+      }
+    }
+
+    window.addEventListener("keydown", handleKeyDown)
+    return () => window.removeEventListener("keydown", handleKeyDown)
+  }, [toggleSidebar])
+
+  // We add a state so that we can do data-state="expanded" or "collapsed".
+  // This makes it easier to style the sidebar with Tailwind classes.
+  const state = open ? "expanded" : "collapsed"
+
+  const contextValue = React.useMemo<SidebarContextProps>(
+    () => ({
+      state,
+      open,
+      setOpen,
+      isMobile,
+      openMobile,
+      setOpenMobile,
+      toggleSidebar,
+    }),
+    [state, open, setOpen, isMobile, openMobile, setOpenMobile, toggleSidebar]
+  )
+
+  return (
+    <SidebarContext.Provider value={contextValue}>
+      <TooltipProvider delayDuration={0}>
+        <div
+          data-slot="sidebar-wrapper"
+          style={
+            {
+              "--sidebar-width": SIDEBAR_WIDTH,
+              "--sidebar-width-icon": SIDEBAR_WIDTH_ICON,
+              ...style,
+            } as React.CSSProperties
+          }
+          className={cn(
+            "group/sidebar-wrapper has-data-[variant=inset]:bg-sidebar flex min-h-svh w-full",
+            className
+          )}
+          {...props}
+        >
+          {children}
+        </div>
+      </TooltipProvider>
+    </SidebarContext.Provider>
+  )
+}
+
+function Sidebar({
+  side = "left",
+  variant = "sidebar",
+  collapsible = "offcanvas",
+  className,
+  children,
+  ...props
+}: React.ComponentProps<"div"> & {
+  side?: "left" | "right"
+  variant?: "sidebar" | "floating" | "inset"
+  collapsible?: "offcanvas" | "icon" | "none"
+}) {
+  const { isMobile, state, openMobile, setOpenMobile } = useSidebar()
+
+  if (collapsible === "none") {
+    return (
+      <div
+        data-slot="sidebar"
+        className={cn(
+          "bg-sidebar text-sidebar-foreground flex h-full w-(--sidebar-width) flex-col",
+          className
+        )}
+        {...props}
+      >
+        {children}
+      </div>
+    )
+  }
+
+  if (isMobile) {
+    return (
+      <Sheet open={openMobile} onOpenChange={setOpenMobile} {...props}>
+        <SheetContent
+          data-sidebar="sidebar"
+          data-slot="sidebar"
+          data-mobile="true"
+          className="bg-sidebar text-sidebar-foreground w-(--sidebar-width) p-0 [&>button]:hidden"
+          style={
+            {
+              "--sidebar-width": SIDEBAR_WIDTH_MOBILE,
+            } as React.CSSProperties
+          }
+          side={side}
+        >
+          <SheetHeader className="sr-only">
+            <SheetTitle>Sidebar</SheetTitle>
+            <SheetDescription>Displays the mobile sidebar.</SheetDescription>
+          </SheetHeader>
+          <div className="flex h-full w-full flex-col">{children}</div>
+        </SheetContent>
+      </Sheet>
+    )
+  }
+
+  return (
+    <div
+      className="group peer text-sidebar-foreground hidden md:block"
+      data-state={state}
+      data-collapsible={state === "collapsed" ? collapsible : ""}
+      data-variant={variant}
+      data-side={side}
+      data-slot="sidebar"
+    >
+      {/* This is what handles the sidebar gap on desktop */}
+      <div
+        data-slot="sidebar-gap"
+        className={cn(
+          "relative w-(--sidebar-width) bg-transparent transition-[width] duration-200 ease-linear",
+          "group-data-[collapsible=offcanvas]:w-0",
+          "group-data-[side=right]:rotate-180",
+          variant === "floating" || variant === "inset"
+            ? "group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4)))]"
+            : "group-data-[collapsible=icon]:w-(--sidebar-width-icon)"
+        )}
+      />
+      <div
+        data-slot="sidebar-container"
+        className={cn(
+          "fixed inset-y-0 z-10 hidden h-svh w-(--sidebar-width) transition-[left,right,width] duration-200 ease-linear md:flex",
+          side === "left"
+            ? "left-0 group-data-[collapsible=offcanvas]:left-[calc(var(--sidebar-width)*-1)]"
+            : "right-0 group-data-[collapsible=offcanvas]:right-[calc(var(--sidebar-width)*-1)]",
+          // Adjust the padding for floating and inset variants.
+          variant === "floating" || variant === "inset"
+            ? "p-2 group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4))+2px)]"
+            : "group-data-[collapsible=icon]:w-(--sidebar-width-icon) group-data-[side=left]:border-r group-data-[side=right]:border-l",
+          className
+        )}
+        {...props}
+      >
+        <div
+          data-sidebar="sidebar"
+          data-slot="sidebar-inner"
+          className="bg-sidebar group-data-[variant=floating]:border-sidebar-border flex h-full w-full flex-col group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:border group-data-[variant=floating]:shadow-sm"
+        >
+          {children}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+function SidebarTrigger({
+  className,
+  onClick,
+  ...props
+}: React.ComponentProps<typeof Button>) {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <Button
+      data-sidebar="trigger"
+      data-slot="sidebar-trigger"
+      variant="ghost"
+      size="icon"
+      className={cn("size-7", className)}
+      onClick={(event) => {
+        onClick?.(event)
+        toggleSidebar()
+      }}
+      {...props}
+    >
+      <PanelLeftIcon />
+      <span className="sr-only">Toggle Sidebar</span>
+    </Button>
+  )
+}
+
+function SidebarRail({ className, ...props }: React.ComponentProps<"button">) {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <button
+      data-sidebar="rail"
+      data-slot="sidebar-rail"
+      aria-label="Toggle Sidebar"
+      tabIndex={-1}
+      onClick={toggleSidebar}
+      title="Toggle Sidebar"
+      className={cn(
+        "hover:after:bg-sidebar-border absolute inset-y-0 z-20 hidden w-4 -translate-x-1/2 transition-all ease-linear group-data-[side=left]:-right-4 group-data-[side=right]:left-0 after:absolute after:inset-y-0 after:left-1/2 after:w-[2px] sm:flex",
+        "in-data-[side=left]:cursor-w-resize in-data-[side=right]:cursor-e-resize",
+        "[[data-side=left][data-state=collapsed]_&]:cursor-e-resize [[data-side=right][data-state=collapsed]_&]:cursor-w-resize",
+        "hover:group-data-[collapsible=offcanvas]:bg-sidebar group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:after:left-full",
+        "[[data-side=left][data-collapsible=offcanvas]_&]:-right-2",
+        "[[data-side=right][data-collapsible=offcanvas]_&]:-left-2",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarInset({ className, ...props }: React.ComponentProps<"main">) {
+  return (
+    <main
+      data-slot="sidebar-inset"
+      className={cn(
+        "bg-background relative flex w-full flex-1 flex-col",
+        "md:peer-data-[variant=inset]:m-2 md:peer-data-[variant=inset]:ml-0 md:peer-data-[variant=inset]:rounded-xl md:peer-data-[variant=inset]:shadow-sm md:peer-data-[variant=inset]:peer-data-[state=collapsed]:ml-2",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarInput({
+  className,
+  ...props
+}: React.ComponentProps<typeof Input>) {
+  return (
+    <Input
+      data-slot="sidebar-input"
+      data-sidebar="input"
+      className={cn("bg-background h-8 w-full shadow-none", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-header"
+      data-sidebar="header"
+      className={cn("flex flex-col gap-2 p-2", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarFooter({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-footer"
+      data-sidebar="footer"
+      className={cn("flex flex-col gap-2 p-2", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarSeparator({
+  className,
+  ...props
+}: React.ComponentProps<typeof Separator>) {
+  return (
+    <Separator
+      data-slot="sidebar-separator"
+      data-sidebar="separator"
+      className={cn("bg-sidebar-border mx-2 w-auto", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarContent({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-content"
+      data-sidebar="content"
+      className={cn(
+        "flex min-h-0 flex-1 flex-col gap-2 overflow-auto group-data-[collapsible=icon]:overflow-hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroup({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-group"
+      data-sidebar="group"
+      className={cn("relative flex w-full min-w-0 flex-col p-2", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroupLabel({
+  className,
+  asChild = false,
+  ...props
+}: React.ComponentProps<"div"> & { asChild?: boolean }) {
+  const Comp = asChild ? Slot : "div"
+
+  return (
+    <Comp
+      data-slot="sidebar-group-label"
+      data-sidebar="group-label"
+      className={cn(
+        "text-sidebar-foreground/70 ring-sidebar-ring flex h-8 shrink-0 items-center rounded-md px-2 text-xs font-medium outline-hidden transition-[margin,opacity] duration-200 ease-linear focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
+        "group-data-[collapsible=icon]:-mt-8 group-data-[collapsible=icon]:opacity-0",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroupAction({
+  className,
+  asChild = false,
+  ...props
+}: React.ComponentProps<"button"> & { asChild?: boolean }) {
+  const Comp = asChild ? Slot : "button"
+
+  return (
+    <Comp
+      data-slot="sidebar-group-action"
+      data-sidebar="group-action"
+      className={cn(
+        "text-sidebar-foreground ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground absolute top-3.5 right-3 flex aspect-square w-5 items-center justify-center rounded-md p-0 outline-hidden transition-transform focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
+        // Increases the hit area of the button on mobile.
+        "after:absolute after:-inset-2 md:after:hidden",
+        "group-data-[collapsible=icon]:hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroupContent({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-group-content"
+      data-sidebar="group-content"
+      className={cn("w-full text-sm", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenu({ className, ...props }: React.ComponentProps<"ul">) {
+  return (
+    <ul
+      data-slot="sidebar-menu"
+      data-sidebar="menu"
+      className={cn("flex w-full min-w-0 flex-col gap-1", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuItem({ className, ...props }: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="sidebar-menu-item"
+      data-sidebar="menu-item"
+      className={cn("group/menu-item relative", className)}
+      {...props}
+    />
+  )
+}
+
+const sidebarMenuButtonVariants = cva(
+  "peer/menu-button flex w-full items-center gap-2 overflow-hidden rounded-md p-2 text-left text-sm outline-hidden ring-sidebar-ring transition-[width,height,padding] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 group-has-data-[sidebar=menu-action]/menu-item:pr-8 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-[active=true]:bg-sidebar-accent data-[active=true]:font-medium data-[active=true]:text-sidebar-accent-foreground data-[state=open]:hover:bg-sidebar-accent data-[state=open]:hover:text-sidebar-accent-foreground group-data-[collapsible=icon]:size-8! group-data-[collapsible=icon]:p-2! [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0",
+  {
+    variants: {
+      variant: {
+        default: "hover:bg-sidebar-accent hover:text-sidebar-accent-foreground",
+        outline:
+          "bg-background shadow-[0_0_0_1px_hsl(var(--sidebar-border))] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground hover:shadow-[0_0_0_1px_hsl(var(--sidebar-accent))]",
+      },
+      size: {
+        default: "h-8 text-sm",
+        sm: "h-7 text-xs",
+        lg: "h-12 text-sm group-data-[collapsible=icon]:p-0!",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+function SidebarMenuButton({
+  asChild = false,
+  isActive = false,
+  variant = "default",
+  size = "default",
+  tooltip,
+  className,
+  ...props
+}: React.ComponentProps<"button"> & {
+  asChild?: boolean
+  isActive?: boolean
+  tooltip?: string | React.ComponentProps<typeof TooltipContent>
+} & VariantProps<typeof sidebarMenuButtonVariants>) {
+  const Comp = asChild ? Slot : "button"
+  const { isMobile, state } = useSidebar()
+
+  const button = (
+    <Comp
+      data-slot="sidebar-menu-button"
+      data-sidebar="menu-button"
+      data-size={size}
+      data-active={isActive}
+      className={cn(sidebarMenuButtonVariants({ variant, size }), className)}
+      {...props}
+    />
+  )
+
+  if (!tooltip) {
+    return button
+  }
+
+  if (typeof tooltip === "string") {
+    tooltip = {
+      children: tooltip,
+    }
+  }
+
+  return (
+    <Tooltip>
+      <TooltipTrigger asChild>{button}</TooltipTrigger>
+      <TooltipContent
+        side="right"
+        align="center"
+        hidden={state !== "collapsed" || isMobile}
+        {...tooltip}
+      />
+    </Tooltip>
+  )
+}
+
+function SidebarMenuAction({
+  className,
+  asChild = false,
+  showOnHover = false,
+  ...props
+}: React.ComponentProps<"button"> & {
+  asChild?: boolean
+  showOnHover?: boolean
+}) {
+  const Comp = asChild ? Slot : "button"
+
+  return (
+    <Comp
+      data-slot="sidebar-menu-action"
+      data-sidebar="menu-action"
+      className={cn(
+        "text-sidebar-foreground ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground peer-hover/menu-button:text-sidebar-accent-foreground absolute top-1.5 right-1 flex aspect-square w-5 items-center justify-center rounded-md p-0 outline-hidden transition-transform focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
+        // Increases the hit area of the button on mobile.
+        "after:absolute after:-inset-2 md:after:hidden",
+        "peer-data-[size=sm]/menu-button:top-1",
+        "peer-data-[size=default]/menu-button:top-1.5",
+        "peer-data-[size=lg]/menu-button:top-2.5",
+        "group-data-[collapsible=icon]:hidden",
+        showOnHover &&
+          "peer-data-[active=true]/menu-button:text-sidebar-accent-foreground group-focus-within/menu-item:opacity-100 group-hover/menu-item:opacity-100 data-[state=open]:opacity-100 md:opacity-0",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuBadge({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="sidebar-menu-badge"
+      data-sidebar="menu-badge"
+      className={cn(
+        "text-sidebar-foreground pointer-events-none absolute right-1 flex h-5 min-w-5 items-center justify-center rounded-md px-1 text-xs font-medium tabular-nums select-none",
+        "peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[active=true]/menu-button:text-sidebar-accent-foreground",
+        "peer-data-[size=sm]/menu-button:top-1",
+        "peer-data-[size=default]/menu-button:top-1.5",
+        "peer-data-[size=lg]/menu-button:top-2.5",
+        "group-data-[collapsible=icon]:hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSkeleton({
+  className,
+  showIcon = false,
+  ...props
+}: React.ComponentProps<"div"> & {
+  showIcon?: boolean
+}) {
+  // Random width between 50 to 90%.
+  const width = React.useMemo(() => {
+    return `${Math.floor(Math.random() * 40) + 50}%`
+  }, [])
+
+  return (
+    <div
+      data-slot="sidebar-menu-skeleton"
+      data-sidebar="menu-skeleton"
+      className={cn("flex h-8 items-center gap-2 rounded-md px-2", className)}
+      {...props}
+    >
+      {showIcon && (
+        <Skeleton
+          className="size-4 rounded-md"
+          data-sidebar="menu-skeleton-icon"
+        />
+      )}
+      <Skeleton
+        className="h-4 max-w-(--skeleton-width) flex-1"
+        data-sidebar="menu-skeleton-text"
+        style={
+          {
+            "--skeleton-width": width,
+          } as React.CSSProperties
+        }
+      />
+    </div>
+  )
+}
+
+function SidebarMenuSub({ className, ...props }: React.ComponentProps<"ul">) {
+  return (
+    <ul
+      data-slot="sidebar-menu-sub"
+      data-sidebar="menu-sub"
+      className={cn(
+        "border-sidebar-border mx-3.5 flex min-w-0 translate-x-px flex-col gap-1 border-l px-2.5 py-0.5",
+        "group-data-[collapsible=icon]:hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSubItem({
+  className,
+  ...props
+}: React.ComponentProps<"li">) {
+  return (
+    <li
+      data-slot="sidebar-menu-sub-item"
+      data-sidebar="menu-sub-item"
+      className={cn("group/menu-sub-item relative", className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSubButton({
+  asChild = false,
+  size = "md",
+  isActive = false,
+  className,
+  ...props
+}: React.ComponentProps<"a"> & {
+  asChild?: boolean
+  size?: "sm" | "md"
+  isActive?: boolean
+}) {
+  const Comp = asChild ? Slot : "a"
+
+  return (
+    <Comp
+      data-slot="sidebar-menu-sub-button"
+      data-sidebar="menu-sub-button"
+      data-size={size}
+      data-active={isActive}
+      className={cn(
+        "text-sidebar-foreground ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground active:bg-sidebar-accent active:text-sidebar-accent-foreground [&>svg]:text-sidebar-accent-foreground flex h-7 min-w-0 -translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 outline-hidden focus-visible:ring-2 disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0",
+        "data-[active=true]:bg-sidebar-accent data-[active=true]:text-sidebar-accent-foreground",
+        size === "sm" && "text-xs",
+        size === "md" && "text-sm",
+        "group-data-[collapsible=icon]:hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  Sidebar,
+  SidebarContent,
+  SidebarFooter,
+  SidebarGroup,
+  SidebarGroupAction,
+  SidebarGroupContent,
+  SidebarGroupLabel,
+  SidebarHeader,
+  SidebarInput,
+  SidebarInset,
+  SidebarMenu,
+  SidebarMenuAction,
+  SidebarMenuBadge,
+  SidebarMenuButton,
+  SidebarMenuItem,
+  SidebarMenuSkeleton,
+  SidebarMenuSub,
+  SidebarMenuSubButton,
+  SidebarMenuSubItem,
+  SidebarProvider,
+  SidebarRail,
+  SidebarSeparator,
+  SidebarTrigger,
+  useSidebar,
+}
diff --git a/internal_frontend/components/ui/skeleton.tsx b/internal_frontend/components/ui/skeleton.tsx
new file mode 100644
index 0000000..32ea0ef
--- /dev/null
+++ b/internal_frontend/components/ui/skeleton.tsx
@@ -0,0 +1,13 @@
+import { cn } from "@/lib/utils"
+
+function Skeleton({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="skeleton"
+      className={cn("bg-accent animate-pulse rounded-md", className)}
+      {...props}
+    />
+  )
+}
+
+export { Skeleton }
diff --git a/internal_frontend/components/ui/tooltip.tsx b/internal_frontend/components/ui/tooltip.tsx
new file mode 100644
index 0000000..4ee26b3
--- /dev/null
+++ b/internal_frontend/components/ui/tooltip.tsx
@@ -0,0 +1,61 @@
+"use client"
+
+import * as React from "react"
+import * as TooltipPrimitive from "@radix-ui/react-tooltip"
+
+import { cn } from "@/lib/utils"
+
+function TooltipProvider({
+  delayDuration = 0,
+  ...props
+}: React.ComponentProps<typeof TooltipPrimitive.Provider>) {
+  return (
+    <TooltipPrimitive.Provider
+      data-slot="tooltip-provider"
+      delayDuration={delayDuration}
+      {...props}
+    />
+  )
+}
+
+function Tooltip({
+  ...props
+}: React.ComponentProps<typeof TooltipPrimitive.Root>) {
+  return (
+    <TooltipProvider>
+      <TooltipPrimitive.Root data-slot="tooltip" {...props} />
+    </TooltipProvider>
+  )
+}
+
+function TooltipTrigger({
+  ...props
+}: React.ComponentProps<typeof TooltipPrimitive.Trigger>) {
+  return <TooltipPrimitive.Trigger data-slot="tooltip-trigger" {...props} />
+}
+
+function TooltipContent({
+  className,
+  sideOffset = 0,
+  children,
+  ...props
+}: React.ComponentProps<typeof TooltipPrimitive.Content>) {
+  return (
+    <TooltipPrimitive.Portal>
+      <TooltipPrimitive.Content
+        data-slot="tooltip-content"
+        sideOffset={sideOffset}
+        className={cn(
+          "bg-primary text-primary-foreground animate-in fade-in-0 zoom-in-95 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 z-50 w-fit origin-(--radix-tooltip-content-transform-origin) rounded-md px-3 py-1.5 text-xs text-balance",
+          className
+        )}
+        {...props}
+      >
+        {children}
+        <TooltipPrimitive.Arrow className="bg-primary fill-primary z-50 size-2.5 translate-y-[calc(-50%_-_2px)] rotate-45 rounded-[2px]" />
+      </TooltipPrimitive.Content>
+    </TooltipPrimitive.Portal>
+  )
+}
+
+export { Tooltip, TooltipTrigger, TooltipContent, TooltipProvider }
diff --git a/internal_frontend/hooks/use-mobile.ts b/internal_frontend/hooks/use-mobile.ts
new file mode 100644
index 0000000..2b0fe1d
--- /dev/null
+++ b/internal_frontend/hooks/use-mobile.ts
@@ -0,0 +1,19 @@
+import * as React from "react"
+
+const MOBILE_BREAKPOINT = 768
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
+
+  React.useEffect(() => {
+    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+    const onChange = () => {
+      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    }
+    mql.addEventListener("change", onChange)
+    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    return () => mql.removeEventListener("change", onChange)
+  }, [])
+
+  return !!isMobile
+}
diff --git a/internal_frontend/lib/auth/authOptions.ts b/internal_frontend/lib/auth/authOptions.ts
new file mode 100644
index 0000000..a8bb1eb
--- /dev/null
+++ b/internal_frontend/lib/auth/authOptions.ts
@@ -0,0 +1,86 @@
+import KeycloakProvider from "next-auth/providers/keycloak";
+import type {NextAuthOptions} from "next-auth";
+
+interface TypedJWT {
+    access_token?: string;
+    refresh_token?: string;
+
+    [key: string]: unknown;
+}
+
+const {
+    KEYCLOAK_CLIENT_ID,
+    KEYCLOAK_CLIENT_SECRET,
+    KEYCLOAK_ISSUER,
+    NEXTAUTH_SECRET,
+} = process.env;
+
+if (!KEYCLOAK_CLIENT_ID) throw new Error("Missing KEYCLOAK_CLIENT_ID");
+if (!KEYCLOAK_CLIENT_SECRET) throw new Error("Missing KEYCLOAK_CLIENT_SECRET");
+if (!KEYCLOAK_ISSUER) throw new Error("Missing KEYCLOAK_ISSUER");
+if (!NEXTAUTH_SECRET) throw new Error("Missing NEXTAUTH_SECRET");
+
+console.log("[auth] Using Keycloak provider:");
+console.log("  - Client ID:", KEYCLOAK_CLIENT_ID);
+console.log("  - Issuer:", KEYCLOAK_ISSUER);
+
+async function isTokenValid(token: string): Promise<boolean> {
+    try {
+        const res = await fetch(`${KEYCLOAK_ISSUER}/protocol/openid-connect/userinfo`, {
+            headers: {
+                Authorization: `Bearer ${token}`,
+            },
+        });
+
+        return res.ok;
+    } catch (error) {
+        console.error("[auth] Failed to validate access token:", error);
+        return false;
+    }
+}
+
+export const authOptions: NextAuthOptions = {
+    providers: [
+        KeycloakProvider({
+            clientId: KEYCLOAK_CLIENT_ID,
+            clientSecret: KEYCLOAK_CLIENT_SECRET,
+            issuer: KEYCLOAK_ISSUER,
+        }),
+    ],
+    secret: NEXTAUTH_SECRET,
+    session: {
+        strategy: "jwt",
+    },
+    callbacks: {
+        async jwt({token, account}) {
+            if (account) {
+                token.access_token = account.access_token;
+                token.refresh_token = account.refresh_token;
+                console.log("[auth] JWT callback: new login from Keycloak");
+                return token;
+            }
+
+            const {access_token} = token as TypedJWT;
+            if (access_token) {
+                const valid = await isTokenValid(access_token);
+                if (!valid) {
+                    console.warn("[auth] Access token invalid — clearing session");
+                    return {};
+                }
+            }
+
+            console.log("[auth] JWT callback: reusing existing token");
+            return token;
+        },
+
+        async session({session, token}) {
+            const {access_token, refresh_token} = token as TypedJWT;
+            console.log("[auth] Session callback: enriching session with tokens");
+            return {
+                ...session,
+                accessToken: access_token,
+                refreshToken: refresh_token,
+            };
+        },
+    },
+};
\ No newline at end of file
diff --git a/internal_frontend/lib/breadcrumb-map.ts b/internal_frontend/lib/breadcrumb-map.ts
new file mode 100644
index 0000000..4a06b70
--- /dev/null
+++ b/internal_frontend/lib/breadcrumb-map.ts
@@ -0,0 +1,8 @@
+// lib/breadcrumb-map.ts
+export const breadcrumbMap: Record<string, string> = {
+    'dashboard': 'Dashboard',
+    'settings': 'Settings',
+    'demo': 'Demo',
+    'users': 'User Management',
+    // Add more mappings as needed
+};
\ No newline at end of file
diff --git a/internal_frontend/lib/utils.ts b/internal_frontend/lib/utils.ts
new file mode 100644
index 0000000..bd0c391
--- /dev/null
+++ b/internal_frontend/lib/utils.ts
@@ -0,0 +1,6 @@
+import { clsx, type ClassValue } from "clsx"
+import { twMerge } from "tailwind-merge"
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}
diff --git a/internal_frontend/package-lock.json b/internal_frontend/package-lock.json
index 86b97f7..14af4cd 100644
--- a/internal_frontend/package-lock.json
+++ b/internal_frontend/package-lock.json
@@ -8,9 +8,23 @@
       "name": "internal_frontend",
       "version": "0.1.0",
       "dependencies": {
+        "@radix-ui/react-collapsible": "^1.1.11",
+        "@radix-ui/react-dialog": "^1.1.14",
+        "@radix-ui/react-dropdown-menu": "^2.1.15",
+        "@radix-ui/react-separator": "^1.1.7",
+        "@radix-ui/react-slot": "^1.2.3",
+        "@radix-ui/react-tooltip": "^1.2.7",
+        "class-variance-authority": "^0.7.1",
+        "clsx": "^2.1.1",
+        "framer-motion": "^12.22.0",
+        "input-otp": "^1.4.2",
+        "lucide-react": "^0.525.0",
         "next": "15.3.4",
+        "next-auth": "^4.24.11",
+        "next-themes": "^0.4.6",
         "react": "^19.0.0",
-        "react-dom": "^19.0.0"
+        "react-dom": "^19.0.0",
+        "tailwind-merge": "^3.3.1"
       },
       "devDependencies": {
         "@eslint/eslintrc": "^3",
@@ -21,6 +35,7 @@
         "eslint": "^9",
         "eslint-config-next": "15.3.4",
         "tailwindcss": "^4",
+        "tw-animate-css": "^1.3.4",
         "typescript": "^5"
       }
     },
@@ -51,6 +66,15 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/@babel/runtime": {
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@@ -3645,6 +4479,16 @@
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+      "license": "MIT",
+      "peerDependencies": {
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@@ -4110,6 +4954,15 @@
         "jiti": "lib/jiti-cli.mjs"
       }
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+      "resolved": "https://registry.npmjs.org/jose/-/jose-4.15.9.tgz",
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+      "license": "MIT",
+      "funding": {
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+      }
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@@ -4499,6 +5352,33 @@
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+      "license": "ISC",
+      "dependencies": {
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+      },
+      "engines": {
+        "node": ">=10"
+      }
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+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+      "license": "ISC"
+    },
+    "node_modules/lucide-react": {
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+      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-0.525.0.tgz",
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+      "license": "ISC",
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+    },
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@@ -4605,6 +5485,21 @@
         "url": "https://github.com/sponsors/isaacs"
       }
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+    "node_modules/motion-dom": {
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+      "resolved": "https://registry.npmjs.org/motion-dom/-/motion-dom-12.22.0.tgz",
+      "integrity": "sha512-ooH7+/BPw9gOsL9VtPhEJHE2m4ltnhMlcGMhEqA0YGNhKof7jdaszvsyThXI6LVIKshJUZ9/CP6HNqQhJfV7kw==",
+      "license": "MIT",
+      "dependencies": {
+        "motion-utils": "^12.19.0"
+      }
+    },
+    "node_modules/motion-utils": {
+      "version": "12.19.0",
+      "resolved": "https://registry.npmjs.org/motion-utils/-/motion-utils-12.19.0.tgz",
+      "integrity": "sha512-BuFTHINYmV07pdWs6lj6aI63vr2N4dg0vR+td0rtrdpWOhBzIkEklZyLcvKBoEtwSqx8Jg06vUB5RS0xDiUybw==",
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@@ -4707,6 +5602,48 @@
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+    "node_modules/next-auth": {
+      "version": "4.24.11",
+      "resolved": "https://registry.npmjs.org/next-auth/-/next-auth-4.24.11.tgz",
+      "integrity": "sha512-pCFXzIDQX7xmHFs4KVH4luCjaCbuPRtZ9oBUjUhOk84mZ9WVPf94n87TxYI4rSRf9HmfHEF8Yep3JrYDVOo3Cw==",
+      "license": "ISC",
+      "dependencies": {
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+        "@panva/hkdf": "^1.0.2",
+        "cookie": "^0.7.0",
+        "jose": "^4.15.5",
+        "oauth": "^0.9.15",
+        "openid-client": "^5.4.0",
+        "preact": "^10.6.3",
+        "preact-render-to-string": "^5.1.19",
+        "uuid": "^8.3.2"
+      },
+      "peerDependencies": {
+        "@auth/core": "0.34.2",
+        "next": "^12.2.5 || ^13 || ^14 || ^15",
+        "nodemailer": "^6.6.5",
+        "react": "^17.0.2 || ^18 || ^19",
+        "react-dom": "^17.0.2 || ^18 || ^19"
+      },
+      "peerDependenciesMeta": {
+        "@auth/core": {
+          "optional": true
+        },
+        "nodemailer": {
+          "optional": true
+        }
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+    },
+    "node_modules/next-themes": {
+      "version": "0.4.6",
+      "resolved": "https://registry.npmjs.org/next-themes/-/next-themes-0.4.6.tgz",
+      "integrity": "sha512-pZvgD5L0IEvX5/9GWyHMf3m8BKiVQwsCMHfoFosXtXBMnaS0ZnIJ9ST4b4NqLVKDEm8QBxoNNGNaBv2JNF6XNA==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc",
+        "react-dom": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc"
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@@ -4735,6 +5672,12 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/oauth": {
+      "version": "0.9.15",
+      "resolved": "https://registry.npmjs.org/oauth/-/oauth-0.9.15.tgz",
+      "integrity": "sha512-a5ERWK1kh38ExDEfoO6qUHJb32rd7aYmPHuyCu3Fta/cnICvYmgd2uhuKXvPD+PXB+gCEYYEaQdIRAjCOwAKNA==",
+      "license": "MIT"
+    },
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@@ -4745,6 +5688,15 @@
         "node": ">=0.10.0"
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+    "node_modules/object-hash": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/object-hash/-/object-hash-2.2.0.tgz",
+      "integrity": "sha512-gScRMn0bS5fH+IuwyIFgnh9zBdo4DV+6GhygmWM9HyNJSgS0hScp1f5vjtm7oIIOiT9trXrShAkLFSc2IqKNgw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/object-inspect": {
       "version": "1.13.4",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.4.tgz",
@@ -4858,6 +5810,30 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/oidc-token-hash": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/oidc-token-hash/-/oidc-token-hash-5.1.0.tgz",
+      "integrity": "sha512-y0W+X7Ppo7oZX6eovsRkuzcSM40Bicg2JEJkDJ4irIt1wsYAP5MLSNv+QAogO8xivMffw/9OvV3um1pxXgt1uA==",
+      "license": "MIT",
+      "engines": {
+        "node": "^10.13.0 || >=12.0.0"
+      }
+    },
+    "node_modules/openid-client": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/openid-client/-/openid-client-5.7.1.tgz",
+      "integrity": "sha512-jDBPgSVfTnkIh71Hg9pRvtJc6wTwqjRkN88+gCFtYWrlP4Yx2Dsrow8uPi3qLr/aeymPF3o2+dS+wOpglK04ew==",
+      "license": "MIT",
+      "dependencies": {
+        "jose": "^4.15.9",
+        "lru-cache": "^6.0.0",
+        "object-hash": "^2.2.0",
+        "oidc-token-hash": "^5.0.3"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.9.4.tgz",
@@ -5024,6 +6000,28 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/preact": {
+      "version": "10.26.9",
+      "resolved": "https://registry.npmjs.org/preact/-/preact-10.26.9.tgz",
+      "integrity": "sha512-SSjF9vcnF27mJK1XyFMNJzFd5u3pQiATFqoaDy03XuN00u4ziveVVEGt5RKJrDR8MHE/wJo9Nnad56RLzS2RMA==",
+      "license": "MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/preact"
+      }
+    },
+    "node_modules/preact-render-to-string": {
+      "version": "5.2.6",
+      "resolved": "https://registry.npmjs.org/preact-render-to-string/-/preact-render-to-string-5.2.6.tgz",
+      "integrity": "sha512-JyhErpYOvBV1hEPwIxc/fHWXPfnEGdRKxc8gFdAZ7XV4tlzyzG847XAyEZqoDnynP88akM4eaHcSOzNcLWFguw==",
+      "license": "MIT",
+      "dependencies": {
+        "pretty-format": "^3.8.0"
+      },
+      "peerDependencies": {
+        "preact": ">=10"
+      }
+    },
     "node_modules/prelude-ls": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",
@@ -5034,6 +6032,12 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/pretty-format": {
+      "version": "3.8.0",
+      "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-3.8.0.tgz",
+      "integrity": "sha512-WuxUnVtlWL1OfZFQFuqvnvs6MiAGk9UNsBostyBOB0Is9wb5uRESevA6rnl/rkksXaGX3GzZhPup5d6Vp1nFew==",
+      "license": "MIT"
+    },
     "node_modules/prop-types": {
       "version": "15.8.1",
       "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz",
@@ -5105,6 +6109,75 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/react-remove-scroll": {
+      "version": "2.7.1",
+      "resolved": "https://registry.npmjs.org/react-remove-scroll/-/react-remove-scroll-2.7.1.tgz",
+      "integrity": "sha512-HpMh8+oahmIdOuS5aFKKY6Pyog+FNaZV/XyJOq7b4YFwsFHe5yYfdbIalI4k3vU2nSDql7YskmUseHsRrJqIPA==",
+      "license": "MIT",
+      "dependencies": {
+        "react-remove-scroll-bar": "^2.3.7",
+        "react-style-singleton": "^2.2.3",
+        "tslib": "^2.1.0",
+        "use-callback-ref": "^1.3.3",
+        "use-sidecar": "^1.1.3"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/react-remove-scroll-bar": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/react-remove-scroll-bar/-/react-remove-scroll-bar-2.3.8.tgz",
+      "integrity": "sha512-9r+yi9+mgU33AKcj6IbT9oRCO78WriSj6t/cF8DWBZJ9aOGPOTEDvdUDz1FwKim7QXWwmHqtdHnRJfhAxEG46Q==",
+      "license": "MIT",
+      "dependencies": {
+        "react-style-singleton": "^2.2.2",
+        "tslib": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/react-style-singleton": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/react-style-singleton/-/react-style-singleton-2.2.3.tgz",
+      "integrity": "sha512-b6jSvxvVnyptAiLjbkWLE/lOnR4lfTtDAl+eUC7RZy+QQWc6wRzIV2CE6xBuMmDxc2qIihtDCZD5NPOFl7fRBQ==",
+      "license": "MIT",
+      "dependencies": {
+        "get-nonce": "^1.0.0",
+        "tslib": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/reflect.getprototypeof": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/reflect.getprototypeof/-/reflect.getprototypeof-1.0.10.tgz",
@@ -5722,6 +6795,16 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/tailwind-merge": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/tailwind-merge/-/tailwind-merge-3.3.1.tgz",
+      "integrity": "sha512-gBXpgUm/3rp1lMZZrM/w7D8GKqshif0zAymAhbCyIt8KMe+0v9DQ7cdYLR4FHH/cKpdTXb+A/tKKU3eolfsI+g==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/dcastil"
+      }
+    },
     "node_modules/tailwindcss": {
       "version": "4.1.11",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.1.11.tgz",
@@ -5847,6 +6930,16 @@
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       "license": "0BSD"
     },
+    "node_modules/tw-animate-css": {
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/tw-animate-css/-/tw-animate-css-1.3.4.tgz",
+      "integrity": "sha512-dd1Ht6/YQHcNbq0znIT6dG8uhO7Ce+VIIhZUhjsryXsMPJQz3bZg7Q2eNzLwipb25bRZslGb2myio5mScd1TFg==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/Wombosvideo"
+      }
+    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -6023,6 +7116,58 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/use-callback-ref": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/use-callback-ref/-/use-callback-ref-1.3.3.tgz",
+      "integrity": "sha512-jQL3lRnocaFtu3V00JToYz/4QkNWswxijDaCVNZRiRTO3HQDLsdu1ZtmIUvV4yPp+rvWm5j0y0TG/S61cuijTg==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/use-sidecar": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/use-sidecar/-/use-sidecar-1.1.3.tgz",
+      "integrity": "sha512-Fedw0aZvkhynoPYlA5WXrMCAMm+nSWdZt6lzJQ7Ok8S6Q+VsHmHpRWndVRJ8Be0ZbkfPc5LRYH+5XrzXcEeLRQ==",
+      "license": "MIT",
+      "dependencies": {
+        "detect-node-es": "^1.1.0",
+        "tslib": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "peerDependencies": {
+        "@types/react": "*",
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/uuid": {
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==",
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
diff --git a/internal_frontend/package.json b/internal_frontend/package.json
index 866b649..be8a24d 100644
--- a/internal_frontend/package.json
+++ b/internal_frontend/package.json
@@ -9,19 +9,34 @@
     "lint": "next lint"
   },
   "dependencies": {
+    "@radix-ui/react-collapsible": "^1.1.11",
+    "@radix-ui/react-dialog": "^1.1.14",
+    "@radix-ui/react-dropdown-menu": "^2.1.15",
+    "@radix-ui/react-separator": "^1.1.7",
+    "@radix-ui/react-slot": "^1.2.3",
+    "@radix-ui/react-tooltip": "^1.2.7",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "framer-motion": "^12.22.0",
+    "input-otp": "^1.4.2",
+    "lucide-react": "^0.525.0",
+    "next": "15.3.4",
+    "next-auth": "^4.24.11",
+    "next-themes": "^0.4.6",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "next": "15.3.4"
+    "tailwind-merge": "^3.3.1"
   },
   "devDependencies": {
-    "typescript": "^5",
+    "@eslint/eslintrc": "^3",
+    "@tailwindcss/postcss": "^4",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "@tailwindcss/postcss": "^4",
-    "tailwindcss": "^4",
     "eslint": "^9",
     "eslint-config-next": "15.3.4",
-    "@eslint/eslintrc": "^3"
+    "tailwindcss": "^4",
+    "tw-animate-css": "^1.3.4",
+    "typescript": "^5"
   }
 }
diff --git a/internal_frontend/tsconfig.json b/internal_frontend/tsconfig.json
index d8b9323..dd19d06 100644
--- a/internal_frontend/tsconfig.json
+++ b/internal_frontend/tsconfig.json
@@ -1,7 +1,11 @@
 {
   "compilerOptions": {
     "target": "ES2017",
-    "lib": ["dom", "dom.iterable", "esnext"],
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
     "allowJs": true,
     "skipLibCheck": true,
     "strict": true,
@@ -19,9 +23,19 @@
       }
     ],
     "paths": {
-      "@/*": ["./*"]
+      "@/*": [
+        "./*"
+      ]
     }
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
-  "exclude": ["node_modules"]
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    "types"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
 }
diff --git a/internal_frontend/types/auth.d.ts b/internal_frontend/types/auth.d.ts
new file mode 100644
index 0000000..5e1c88a
--- /dev/null
+++ b/internal_frontend/types/auth.d.ts
@@ -0,0 +1,16 @@
+import NextAuth from "next-auth";
+import {JWT} from "next-auth/jwt";
+
+declare module "next-auth/jwt" {
+    interface JWT {
+        access_token?: string;
+        refresh_token?: string;
+    }
+}
+
+declare module "next-auth" {
+    interface Session {
+        accessToken?: string;
+        refreshToken?: string;
+    }
+}
diff --git a/internal_frontend/utils/BreadcrumbUtils.ts b/internal_frontend/utils/BreadcrumbUtils.ts
new file mode 100644
index 0000000..c10de82
--- /dev/null
+++ b/internal_frontend/utils/BreadcrumbUtils.ts
@@ -0,0 +1,28 @@
+// utils/getBreadcrumbs.ts
+import {breadcrumbMap} from '@/lib/breadcrumb-map';
+
+export type Breadcrumb = {
+    label: string;
+    href: string;
+    isCurrentPage?: boolean;
+};
+
+export function getBreadcrumbs(path: string): Breadcrumb[] {
+    const pathSegments = path.split('/').filter(Boolean);
+
+    return pathSegments.map((segment, index) => {
+        const href = `/${pathSegments.slice(0, index + 1).join('/')}`;
+        // Use the mapping if it exists, otherwise format the segment
+        const label = breadcrumbMap[segment.toLowerCase()] ||
+            segment
+                .split('-')
+                .map(word => word.charAt(0).toUpperCase() + word.slice(1))
+                .join(' ');
+
+        return {
+            label,
+            href,
+            isCurrentPage: index === pathSegments.length - 1
+        };
+    });
+}
\ No newline at end of file