feat: implement lesson creation directly on the schedule calendar via a new API endpoint and database updates.

.gitignore

@@ -0,0 +1,43 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+/src/generated/prisma

README.md

@@ -1,2 +1,36 @@
-# dance_school
+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
 
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.

eslint.config.mjs

@@ -0,0 +1,18 @@
+import { defineConfig, globalIgnores } from "eslint/config";
+import nextVitals from "eslint-config-next/core-web-vitals";
+import nextTs from "eslint-config-next/typescript";
+
+const eslintConfig = defineConfig([
+  ...nextVitals,
+  ...nextTs,
+  // Override default ignores of eslint-config-next.
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    ".next/**",
+    "out/**",
+    "build/**",
+    "next-env.d.ts",
+  ]),
+]);
+
+export default eslintConfig;

next.config.ts

@@ -0,0 +1,7 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  /* config options here */
+};
+
+export default nextConfig;

package.json

@@ -0,0 +1,31 @@
+{
+  "name": "temp_app",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "eslint"
+  },
+  "dependencies": {
+    "@prisma/client": "^5.22.0",
+    "bcryptjs": "^3.0.3",
+    "jose": "^6.1.3",
+    "next": "16.1.1",
+    "prisma": "^5.22.0",
+    "react": "19.2.3",
+    "react-dom": "19.2.3"
+  },
+  "devDependencies": {
+    "@types/bcryptjs": "^2.4.6",
+    "@types/node": "^20",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "dotenv": "^17.2.3",
+    "eslint": "^9",
+    "eslint-config-next": "16.1.1",
+    "tsx": "^4.21.0",
+    "typescript": "^5"
+  }
+}

prisma/schema.prisma

@@ -0,0 +1,96 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  id        String   @id @default(uuid())
+  username  String   @unique
+  password  String
+  createdAt DateTime @default(now())
+}
+
+model Branch {
+  id          String       @id @default(uuid())
+  name        String
+  address     String?
+  phone       String?
+  hallCount   Int?         @default(1)
+  createdAt   DateTime     @default(now())
+  updatedAt   DateTime     @updatedAt
+  classes     DanceClass[]
+  lessons     Lesson[]
+  students    Student[]
+  instructors Instructor[] @relation("BranchToInstructor")
+}
+
+model Instructor {
+  id        String       @id @default(uuid())
+  name      String
+  bio       String?
+  phone     String?
+  createdAt DateTime     @default(now())
+  updatedAt DateTime     @updatedAt
+  classes   DanceClass[]
+  lessons   Lesson[]
+  branches  Branch[]     @relation("BranchToInstructor")
+}
+
+model DanceClass {
+  id           String      @id @default(uuid())
+  name         String
+  description  String?
+  branchId     String
+  instructorId String?
+  createdAt    DateTime    @default(now())
+  updatedAt    DateTime    @updatedAt
+  instructor   Instructor? @relation(fields: [instructorId], references: [id])
+  branch       Branch      @relation(fields: [branchId], references: [id])
+  fees         Fee[]
+  lessons      Lesson[]
+}
+
+model Lesson {
+  id           String      @id @default(uuid())
+  name         String?
+  startTime    DateTime
+  endTime      DateTime
+  type         String
+  hallNumber   Int         @default(1)
+  branchId     String
+  instructorId String
+  classId      String?
+  createdAt    DateTime    @default(now())
+  updatedAt    DateTime    @updatedAt
+  class        DanceClass? @relation(fields: [classId], references: [id])
+  instructor   Instructor  @relation(fields: [instructorId], references: [id])
+  branch       Branch      @relation(fields: [branchId], references: [id])
+}
+
+model Fee {
+  id        String      @id @default(uuid())
+  name      String
+  amount    Float
+  currency  String      @default("TRY")
+  type      String
+  classId   String?
+  createdAt DateTime    @default(now())
+  updatedAt DateTime    @updatedAt
+  class     DanceClass? @relation(fields: [classId], references: [id])
+}
+
+model Student {
+  id        String   @id @default(uuid())
+  name      String
+  email     String?
+  phone     String
+  birthDate DateTime
+  branchId  String?
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  branch    Branch?  @relation(fields: [branchId], references: [id])
+}

public/file.svg

@@ -0,0 +1 @@
+<svg fill="none" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="M14.5 13.5V5.41a1 1 0 0 0-.3-.7L9.8.29A1 1 0 0 0 9.08 0H1.5v13.5A2.5 2.5 0 0 0 4 16h8a2.5 2.5 0 0 0 2.5-2.5m-1.5 0v-7H8v-5H3v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1M9.5 5V2.12L12.38 5zM5.13 5h-.62v1.25h2.12V5zm-.62 3h7.12v1.25H4.5zm.62 3h-.62v1.25h7.12V11z" clip-rule="evenodd" fill="#666" fill-rule="evenodd"/></svg>

public/globe.svg

@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><g clip-path="url(#a)"><path fill-rule="evenodd" clip-rule="evenodd" d="M10.27 14.1a6.5 6.5 0 0 0 3.67-3.45q-1.24.21-2.7.34-.31 1.83-.97 3.1M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16m.48-1.52a7 7 0 0 1-.96 0H7.5a4 4 0 0 1-.84-1.32q-.38-.89-.63-2.08a40 40 0 0 0 3.92 0q-.25 1.2-.63 2.08a4 4 0 0 1-.84 1.31zm2.94-4.76q1.66-.15 2.95-.43a7 7 0 0 0 0-2.58q-1.3-.27-2.95-.43a18 18 0 0 1 0 3.44m-1.27-3.54a17 17 0 0 1 0 3.64 39 39 0 0 1-4.3 0 17 17 0 0 1 0-3.64 39 39 0 0 1 4.3 0m1.1-1.17q1.45.13 2.69.34a6.5 6.5 0 0 0-3.67-3.44q.65 1.26.98 3.1M8.48 1.5l.01.02q.41.37.84 1.31.38.89.63 2.08a40 40 0 0 0-3.92 0q.25-1.2.63-2.08a4 4 0 0 1 .85-1.32 7 7 0 0 1 .96 0m-2.75.4a6.5 6.5 0 0 0-3.67 3.44 29 29 0 0 1 2.7-.34q.31-1.83.97-3.1M4.58 6.28q-1.66.16-2.95.43a7 7 0 0 0 0 2.58q1.3.27 2.95.43a18 18 0 0 1 0-3.44m.17 4.71q-1.45-.12-2.69-.34a6.5 6.5 0 0 0 3.67 3.44q-.65-1.27-.98-3.1" fill="#666"/></g><defs><clipPath id="a"><path fill="#fff" d="M0 0h16v16H0z"/></clipPath></defs></svg>

public/next.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 394 80"><path fill="#000" d="M262 0h68.5v12.7h-27.2v66.6h-13.6V12.7H262V0ZM149 0v12.7H94v20.4h44.3v12.6H94v21h55v12.6H80.5V0h68.7zm34.3 0h-17.8l63.8 79.4h17.9l-32-39.7 32-39.6h-17.9l-23 28.6-23-28.6zm18.3 56.7-9-11-27.1 33.7h17.8l18.3-22.7z"/><path fill="#000" d="M81 79.3 17 0H0v79.3h13.6V17l50.2 62.3H81Zm252.6-.4c-1 0-1.8-.4-2.5-1s-1.1-1.6-1.1-2.6.3-1.8 1-2.5 1.6-1 2.6-1 1.8.3 2.5 1a3.4 3.4 0 0 1 .6 4.3 3.7 3.7 0 0 1-3 1.8zm23.2-33.5h6v23.3c0 2.1-.4 4-1.3 5.5a9.1 9.1 0 0 1-3.8 3.5c-1.6.8-3.5 1.3-5.7 1.3-2 0-3.7-.4-5.3-1s-2.8-1.8-3.7-3.2c-.9-1.3-1.4-3-1.4-5h6c.1.8.3 1.6.7 2.2s1 1.2 1.6 1.5c.7.4 1.5.5 2.4.5 1 0 1.8-.2 2.4-.6a4 4 0 0 0 1.6-1.8c.3-.8.5-1.8.5-3V45.5zm30.9 9.1a4.4 4.4 0 0 0-2-3.3 7.5 7.5 0 0 0-4.3-1.1c-1.3 0-2.4.2-3.3.5-.9.4-1.6 1-2 1.6a3.5 3.5 0 0 0-.3 4c.3.5.7.9 1.3 1.2l1.8 1 2 .5 3.2.8c1.3.3 2.5.7 3.7 1.2a13 13 0 0 1 3.2 1.8 8.1 8.1 0 0 1 3 6.5c0 2-.5 3.7-1.5 5.1a10 10 0 0 1-4.4 3.5c-1.8.8-4.1 1.2-6.8 1.2-2.6 0-4.9-.4-6.8-1.2-2-.8-3.4-2-4.5-3.5a10 10 0 0 1-1.7-5.6h6a5 5 0 0 0 3.5 4.6c1 .4 2.2.6 3.4.6 1.3 0 2.5-.2 3.5-.6 1-.4 1.8-1 2.4-1.7a4 4 0 0 0 .8-2.4c0-.9-.2-1.6-.7-2.2a11 11 0 0 0-2.1-1.4l-3.2-1-3.8-1c-2.8-.7-5-1.7-6.6-3.2a7.2 7.2 0 0 1-2.4-5.7 8 8 0 0 1 1.7-5 10 10 0 0 1 4.3-3.5c2-.8 4-1.2 6.4-1.2 2.3 0 4.4.4 6.2 1.2 1.8.8 3.2 2 4.3 3.4 1 1.4 1.5 3 1.5 5h-5.8z"/></svg>

public/vercel.svg

@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1155 1000"><path d="m577.3 0 577.4 1000H0z" fill="#fff"/></svg>

public/window.svg

@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><path fill-rule="evenodd" clip-rule="evenodd" d="M1.5 2.5h13v10a1 1 0 0 1-1 1h-11a1 1 0 0 1-1-1zM0 1h16v11.5a2.5 2.5 0 0 1-2.5 2.5h-11A2.5 2.5 0 0 1 0 12.5zm3.75 4.5a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5M7 4.75a.75.75 0 1 1-1.5 0 .75.75 0 0 1 1.5 0m1.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5" fill="#666"/></svg>

scripts/seed.ts

@@ -0,0 +1,29 @@
+import 'dotenv/config';
+import { PrismaClient } from '@prisma/client';
+import bcrypt from 'bcryptjs';
+
+// Manually read .env if needed, but dotenv/config should handle it
+const prisma = new PrismaClient();
+
+async function main() {
+    const password = await bcrypt.hash('admin123', 10);
+    const user = await prisma.user.upsert({
+        where: { username: 'admin' },
+        update: {},
+        create: {
+            username: 'admin',
+            password,
+        },
+    });
+    console.log('Admin user created:', user);
+}
+
+main()
+    .then(async () => {
+        await prisma.$disconnect();
+    })
+    .catch(async (e) => {
+        console.error(e);
+        await prisma.$disconnect();
+        process.exit(1);
+    });

src/app/admin/admin.module.css

@@ -0,0 +1,67 @@
+.layout {
+    display: flex;
+    min-height: 100vh;
+}
+
+.sidebar {
+    width: 250px;
+    background-color: #1a1a1a;
+    color: white;
+    padding: 2rem;
+    display: flex;
+    flex-direction: column;
+}
+
+.brand {
+    font-size: 1.5rem;
+    font-weight: bold;
+    margin-bottom: 2rem;
+    color: #fff;
+    text-decoration: none;
+}
+
+.nav {
+    display: flex;
+    flex-direction: column;
+    gap: 1rem;
+    flex: 1;
+}
+
+.navLink {
+    color: #aaa;
+    text-decoration: none;
+    font-size: 1.1rem;
+    padding: 0.5rem 0;
+    transition: color 0.2s;
+}
+
+.navLink:hover {
+    color: white;
+}
+
+.active {
+    color: white;
+    font-weight: bold;
+}
+
+.main {
+    flex: 1;
+    background-color: #f9f9f9;
+    padding: 2rem;
+    overflow-y: auto;
+}
+
+.logoutBtn {
+    margin-top: auto;
+    background: none;
+    border: 1px solid #333;
+    color: #999;
+    padding: 0.5rem;
+    cursor: pointer;
+    border-radius: 4px;
+}
+
+.logoutBtn:hover {
+    color: white;
+    border-color: white;
+}

src/app/admin/branches/AddBranchForm.tsx

@@ -0,0 +1,47 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from './branches.module.css';
+
+export function AddBranchForm() {
+    const [name, setName] = useState('');
+    const [address, setAddress] = useState('');
+    const [phone, setPhone] = useState('');
+    const [hallCount, setHallCount] = useState('1');
+    const router = useRouter();
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault();
+        await fetch('/api/branches', {
+            method: 'POST',
+            body: JSON.stringify({ name, address, phone, hallCount: parseInt(hallCount) }),
+        });
+        setName('');
+        setAddress('');
+        setPhone('');
+        setHallCount('1');
+        router.refresh();
+    };
+
+    return (
+        <form onSubmit={handleSubmit} className={styles.form}>
+            <div className={styles.inputGroup}>
+                <label>Şube Adı</label>
+                <input value={name} onChange={e => setName(e.target.value)} className={styles.input} required />
+            </div>
+            <div className={styles.inputGroup}>
+                <label>Telefon</label>
+                <input value={phone} onChange={e => setPhone(e.target.value)} className={styles.input} />
+            </div>
+            <div className={styles.inputGroup}>
+                <label>Adres</label>
+                <input value={address} onChange={e => setAddress(e.target.value)} className={styles.input} />
+            </div>
+            <div className={styles.inputGroup}>
+                <label>Salon Sayısı</label>
+                <input type="number" min="1" value={hallCount} onChange={e => setHallCount(e.target.value)} className={styles.input} />
+            </div>
+            <button type="submit" className={styles.btn}>Ekle</button>
+        </form>
+    );
+}

src/app/admin/branches/BranchList.tsx

@@ -0,0 +1,106 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from './branches.module.css';
+
+export function BranchList({ branches }: { branches: any[] }) {
+    const router = useRouter();
+    const [editingId, setEditingId] = useState<string | null>(null);
+    const [editForm, setEditForm] = useState<any>(null);
+
+    const handleDelete = async (id: string) => {
+        if (!confirm('Silmek istediğinize emin misiniz?')) return;
+        await fetch(`/api/branches/${id}`, { method: 'DELETE' });
+        router.refresh();
+    };
+
+    const startEdit = (branch: any) => {
+        setEditingId(branch.id);
+        setEditForm({
+            name: branch.name,
+            phone: branch.phone || '',
+            address: branch.address || '',
+            hallCount: branch.hallCount?.toString() || '1'
+        });
+    };
+
+    const handleUpdate = async (e: React.FormEvent) => {
+        e.preventDefault();
+        const res = await fetch(`/api/branches/${editingId}`, {
+            method: 'PUT',
+            body: JSON.stringify(editForm),
+            headers: { 'Content-Type': 'application/json' }
+        });
+
+        if (res.ok) {
+            setEditingId(null);
+            router.refresh();
+        } else {
+            alert('Güncelleme başarısız oldu.');
+        }
+    };
+
+    return (
+        <div className={styles.list}>
+            {branches.map(b => (
+                <div key={b.id} className={styles.card}>
+                    {editingId === b.id ? (
+                        <form onSubmit={handleUpdate} style={{ width: '100%', display: 'flex', gap: '1rem', flexWrap: 'wrap', alignItems: 'flex-end' }}>
+                            <div className={styles.inputGroup}>
+                                <label>Şube Adı</label>
+                                <input
+                                    value={editForm.name}
+                                    onChange={e => setEditForm({ ...editForm, name: e.target.value })}
+                                    className={styles.input}
+                                    required
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Telefon</label>
+                                <input
+                                    value={editForm.phone}
+                                    onChange={e => setEditForm({ ...editForm, phone: e.target.value })}
+                                    className={styles.input}
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Adres</label>
+                                <input
+                                    value={editForm.address}
+                                    onChange={e => setEditForm({ ...editForm, address: e.target.value })}
+                                    className={styles.input}
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Salon Sayısı</label>
+                                <input
+                                    type="number"
+                                    min="1"
+                                    value={editForm.hallCount}
+                                    onChange={e => setEditForm({ ...editForm, hallCount: e.target.value })}
+                                    className={styles.input}
+                                />
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button type="submit" className={styles.btn} style={{ background: '#2e7d32' }}>Kaydet</button>
+                                <button type="button" onClick={() => setEditingId(null)} className={styles.btn}>İptal</button>
+                            </div>
+                        </form>
+                    ) : (
+                        <>
+                            <div>
+                                <h3>{b.name}</h3>
+                                <p>{b.phone ? `Tel: ${b.phone}` : 'Telefon yok'} | {b.address || 'Adres yok'}</p>
+                                <small>Salon Sayısı: {b.hallCount || 1}</small>
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button onClick={() => startEdit(b)} className={styles.btn} style={{ background: '#ffa000' }}>Düzenle</button>
+                                <button onClick={() => handleDelete(b.id)} className={`${styles.btn} ${styles.btnDelete}`}>Sil</button>
+                            </div>
+                        </>
+                    )}
+                </div>
+            ))}
+        </div>
+    );
+}

src/app/admin/branches/branches.module.css

@@ -0,0 +1,62 @@
+.container {
+    padding: 1rem;
+}
+
+.header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 2rem;
+}
+
+.form {
+    background: white;
+    padding: 1.5rem;
+    border-radius: 8px;
+    margin-bottom: 2rem;
+    display: flex;
+    gap: 1rem;
+    align-items: flex-end;
+    flex-wrap: wrap;
+}
+
+.inputGroup {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+.input {
+    padding: 0.5rem;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    min-width: 200px;
+}
+
+.btn {
+    padding: 0.6rem 1.2rem;
+    background: #333;
+    color: white;
+    border: none;
+    border-radius: 4px;
+    cursor: pointer;
+}
+
+.btnDelete {
+    background: #d32f2f;
+}
+
+.list {
+    display: grid;
+    gap: 1rem;
+}
+
+.card {
+    background: white;
+    padding: 1.5rem;
+    border-radius: 8px;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
+}

src/app/admin/branches/page.tsx

@@ -0,0 +1,17 @@
+import { prisma } from '@/infrastructure/db/prisma';
+import { AddBranchForm } from './AddBranchForm';
+import { BranchList } from './BranchList';
+import styles from './branches.module.css';
+
+export default async function Page() {
+    const branches = await prisma.branch.findMany({ orderBy: { createdAt: 'desc' } });
+    return (
+        <div className={styles.container}>
+            <div className={styles.header}>
+                <h1>Şubeler</h1>
+            </div>
+            <AddBranchForm />
+            <BranchList branches={branches} />
+        </div>
+    );
+}

src/app/admin/classes/AddClassForm.tsx

@@ -0,0 +1,49 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from '../branches/branches.module.css';
+
+export function AddClassForm({ branches, instructors }: { branches: any[], instructors: any[] }) {
+    const [name, setName] = useState('');
+    const [branchId, setBranchId] = useState('');
+    const [instructorId, setInstructorId] = useState(''); // Optional
+    const router = useRouter();
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault();
+        if (!branchId) return alert('Şube seçiniz');
+
+        await fetch('/api/classes', {
+            method: 'POST',
+            body: JSON.stringify({ name, branchId, instructorId: instructorId || null }),
+        });
+        setName('');
+        setBranchId('');
+        setInstructorId('');
+        router.refresh();
+    };
+
+    return (
+        <form onSubmit={handleSubmit} className={styles.form}>
+            <div className={styles.inputGroup}>
+                <label>Sınıf Adı</label>
+                <input value={name} onChange={e => setName(e.target.value)} className={styles.input} required />
+            </div>
+            <div className={styles.inputGroup}>
+                <label>Şube</label>
+                <select value={branchId} onChange={e => setBranchId(e.target.value)} className={styles.input} required>
+                    <option value="">Seçiniz</option>
+                    {branches.map(b => <option key={b.id} value={b.id}>{b.name}</option>)}
+                </select>
+            </div>
+            <div className={styles.inputGroup}>
+                <label>Varsayılan Hoca (Opsiyonel)</label>
+                <select value={instructorId} onChange={e => setInstructorId(e.target.value)} className={styles.input}>
+                    <option value="">Seçiniz</option>
+                    {instructors.map(i => <option key={i.id} value={i.id}>{i.name}</option>)}
+                </select>
+            </div>
+            <button type="submit" className={styles.btn}>Ekle</button>
+        </form>
+    );
+}

src/app/admin/classes/ClassList.tsx

@@ -0,0 +1,124 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from '../branches/branches.module.css';
+
+export function ClassList({
+    classes,
+    branches,
+    instructors
+}: {
+    classes: any[],
+    branches: any[],
+    instructors: any[]
+}) {
+    const router = useRouter();
+    const [editingId, setEditingId] = useState<string | null>(null);
+    const [editForm, setEditForm] = useState<any>(null);
+
+    const handleDelete = async (id: string) => {
+        if (!confirm('Silmek istediğinize emin misiniz?')) return;
+        await fetch(`/api/classes/${id}`, { method: 'DELETE' });
+        router.refresh();
+    };
+
+    const startEdit = (c: any) => {
+        setEditingId(c.id);
+        setEditForm({
+            name: c.name,
+            description: c.description || '',
+            branchId: c.branchId,
+            instructorId: c.instructorId || ''
+        });
+    };
+
+    const handleUpdate = async (e: React.FormEvent) => {
+        e.preventDefault();
+        const res = await fetch(`/api/classes/${editingId}`, {
+            method: 'PATCH',
+            body: JSON.stringify(editForm),
+            headers: { 'Content-Type': 'application/json' }
+        });
+
+        if (res.ok) {
+            setEditingId(null);
+            router.refresh();
+        } else {
+            alert('Güncelleme başarısız oldu.');
+        }
+    };
+
+    return (
+        <div className={styles.list}>
+            {classes.map(c => (
+                <div key={c.id} className={styles.card}>
+                    {editingId === c.id ? (
+                        <form onSubmit={handleUpdate} style={{ width: '100%', display: 'flex', gap: '1rem', flexWrap: 'wrap', alignItems: 'flex-end' }}>
+                            <div className={styles.inputGroup}>
+                                <label>Sınıf Adı</label>
+                                <input
+                                    value={editForm.name}
+                                    onChange={e => setEditForm({ ...editForm, name: e.target.value })}
+                                    className={styles.input}
+                                    required
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Açıklama</label>
+                                <input
+                                    value={editForm.description}
+                                    onChange={e => setEditForm({ ...editForm, description: e.target.value })}
+                                    className={styles.input}
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Şube</label>
+                                <select
+                                    value={editForm.branchId}
+                                    onChange={e => setEditForm({ ...editForm, branchId: e.target.value })}
+                                    className={styles.input}
+                                    required
+                                >
+                                    <option value="">Şube Seçiniz</option>
+                                    {branches.map(b => (
+                                        <option key={b.id} value={b.id}>{b.name}</option>
+                                    ))}
+                                </select>
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Eğitmen</label>
+                                <select
+                                    value={editForm.instructorId}
+                                    onChange={e => setEditForm({ ...editForm, instructorId: e.target.value })}
+                                    className={styles.input}
+                                >
+                                    <option value="">Eğitmen Seçiniz</option>
+                                    {instructors.map(i => (
+                                        <option key={i.id} value={i.id}>{i.name}</option>
+                                    ))}
+                                </select>
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button type="submit" className={styles.btn} style={{ background: '#2e7d32' }}>Kaydet</button>
+                                <button type="button" onClick={() => setEditingId(null)} className={styles.btn}>İptal</button>
+                            </div>
+                        </form>
+                    ) : (
+                        <>
+                            <div>
+                                <h3>{c.name}</h3>
+                                <p>Şube: {c.branch?.name}</p>
+                                {c.instructor && <p>Hoca: {c.instructor.name}</p>}
+                                <small>{c.description}</small>
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button onClick={() => startEdit(c)} className={styles.btn} style={{ background: '#ffa000' }}>Düzenle</button>
+                                <button onClick={() => handleDelete(c.id)} className={`${styles.btn} ${styles.btnDelete}`}>Sil</button>
+                            </div>
+                        </>
+                    )}
+                </div>
+            ))}
+        </div>
+    );
+}

src/app/admin/classes/page.tsx

@@ -0,0 +1,22 @@
+import { prisma } from '@/infrastructure/db/prisma';
+import { AddClassForm } from './AddClassForm';
+import { ClassList } from './ClassList';
+import styles from '../branches/branches.module.css';
+
+export default async function Page() {
+    const [classes, branches, instructors] = await Promise.all([
+        prisma.danceClass.findMany({ include: { branch: true, instructor: true }, orderBy: { createdAt: 'desc' } }),
+        prisma.branch.findMany({ select: { id: true, name: true } }),
+        prisma.instructor.findMany({ select: { id: true, name: true } })
+    ]);
+
+    return (
+        <div className={styles.container}>
+            <div className={styles.header}>
+                <h1>Sınıflar</h1>
+            </div>
+            <AddClassForm branches={branches} instructors={instructors} />
+            <ClassList classes={classes} branches={branches} instructors={instructors} />
+        </div>
+    );
+}

src/app/admin/dashboard/dashboard.module.css

@@ -0,0 +1,3 @@
+.container {
+    padding: 2rem;
+}

src/app/admin/dashboard/page.tsx

@@ -0,0 +1,10 @@
+import styles from './dashboard.module.css';
+
+export default function Dashboard() {
+    return (
+        <div className={styles.container}>
+            <h1>Dashboard</h1>
+            <p>Welcome to the Admin Panel</p>
+        </div>
+    );
+}

src/app/admin/instructors/AddInstructorForm.tsx

@@ -0,0 +1,35 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from '../branches/branches.module.css'; // Reuse styles
+
+export function AddInstructorForm() {
+    const [name, setName] = useState('');
+    const [bio, setBio] = useState('');
+    const router = useRouter();
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault();
+        await fetch('/api/instructors', {
+            method: 'POST',
+            body: JSON.stringify({ name, bio }),
+        });
+        setName('');
+        setBio('');
+        router.refresh();
+    };
+
+    return (
+        <form onSubmit={handleSubmit} className={styles.form}>
+            <div className={styles.inputGroup}>
+                <label>Hoca Adı</label>
+                <input value={name} onChange={e => setName(e.target.value)} className={styles.input} required />
+            </div>
+            <div className={styles.inputGroup}>
+                <label>Biyografi / Uzmanlık</label>
+                <input value={bio} onChange={e => setBio(e.target.value)} className={styles.input} />
+            </div>
+            <button type="submit" className={styles.btn}>Ekle</button>
+        </form>
+    );
+}

src/app/admin/instructors/InstructorList.tsx

@@ -0,0 +1,94 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from '../branches/branches.module.css';
+
+export function InstructorList({ instructors }: { instructors: any[] }) {
+    const router = useRouter();
+    const [editingId, setEditingId] = useState<string | null>(null);
+    const [editForm, setEditForm] = useState<any>(null);
+
+    const handleDelete = async (id: string) => {
+        if (!confirm('Silmek istediğinize emin misiniz?')) return;
+        await fetch(`/api/instructors/${id}`, { method: 'DELETE' });
+        router.refresh();
+    };
+
+    const startEdit = (instructor: any) => {
+        setEditingId(instructor.id);
+        setEditForm({
+            name: instructor.name,
+            phone: instructor.phone || '',
+            bio: instructor.bio || ''
+        });
+    };
+
+    const handleUpdate = async (e: React.FormEvent) => {
+        e.preventDefault();
+        const res = await fetch(`/api/instructors/${editingId}`, {
+            method: 'PATCH',
+            body: JSON.stringify(editForm),
+            headers: { 'Content-Type': 'application/json' }
+        });
+
+        if (res.ok) {
+            setEditingId(null);
+            router.refresh();
+        } else {
+            alert('Güncelleme başarısız oldu.');
+        }
+    };
+
+    return (
+        <div className={styles.list}>
+            {instructors.map(i => (
+                <div key={i.id} className={styles.card}>
+                    {editingId === i.id ? (
+                        <form onSubmit={handleUpdate} style={{ width: '100%', display: 'flex', gap: '1rem', flexWrap: 'wrap', alignItems: 'flex-end' }}>
+                            <div className={styles.inputGroup}>
+                                <label>Hoca Adı</label>
+                                <input
+                                    value={editForm.name}
+                                    onChange={e => setEditForm({ ...editForm, name: e.target.value })}
+                                    className={styles.input}
+                                    required
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Telefon</label>
+                                <input
+                                    value={editForm.phone}
+                                    onChange={e => setEditForm({ ...editForm, phone: e.target.value })}
+                                    className={styles.input}
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Biyo</label>
+                                <input
+                                    value={editForm.bio}
+                                    onChange={e => setEditForm({ ...editForm, bio: e.target.value })}
+                                    className={styles.input}
+                                />
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button type="submit" className={styles.btn} style={{ background: '#2e7d32' }}>Kaydet</button>
+                                <button type="button" onClick={() => setEditingId(null)} className={styles.btn}>İptal</button>
+                            </div>
+                        </form>
+                    ) : (
+                        <>
+                            <div>
+                                <h3>{i.name} {i.phone && <small>({i.phone})</small>}</h3>
+                                <p>{i.bio || 'Biyografi bulunmuyor'}</p>
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button onClick={() => startEdit(i)} className={styles.btn} style={{ background: '#ffa000' }}>Düzenle</button>
+                                <button onClick={() => handleDelete(i.id)} className={`${styles.btn} ${styles.btnDelete}`}>Sil</button>
+                            </div>
+                        </>
+                    )}
+                </div>
+            ))}
+        </div>
+    );
+}

src/app/admin/instructors/page.tsx

@@ -0,0 +1,17 @@
+import { prisma } from '@/infrastructure/db/prisma';
+import { AddInstructorForm } from './AddInstructorForm';
+import { InstructorList } from './InstructorList';
+import styles from '../branches/branches.module.css';
+
+export default async function Page() {
+    const instructors = await prisma.instructor.findMany({ orderBy: { createdAt: 'desc' } });
+    return (
+        <div className={styles.container}>
+            <div className={styles.header}>
+                <h1>Hocalar</h1>
+            </div>
+            <AddInstructorForm />
+            <InstructorList instructors={instructors} />
+        </div>
+    );
+}

src/app/admin/layout.tsx

@@ -0,0 +1,15 @@
+import { Sidebar } from '@/presentation/components/Sidebar';
+import styles from './admin.module.css';
+
+export default function AdminLayout({
+    children,
+}: {
+    children: React.ReactNode;
+}) {
+    return (
+        <div className={styles.layout}>
+            <Sidebar />
+            <main className={styles.main}>{children}</main>
+        </div>
+    );
+}

src/app/admin/register/RegisterForm.tsx

@@ -0,0 +1,69 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from '../branches/branches.module.css';
+
+export function RegisterForm({ branches }: { branches: any[] }) {
+    const [formData, setFormData] = useState({
+        name: '',
+        email: '',
+        phone: '',
+        birthDate: '',
+        branchId: ''
+    });
+    const router = useRouter();
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault();
+        const res = await fetch('/api/register', {
+            method: 'POST',
+            body: JSON.stringify(formData),
+            headers: { 'Content-Type': 'application/json' }
+        });
+
+        if (res.ok) {
+            setFormData({ name: '', email: '', phone: '', birthDate: '', branchId: '' });
+            router.refresh();
+        }
+    };
+
+    const handleChange = (e: React.ChangeEvent<HTMLInputElement | HTMLSelectElement>) => {
+        setFormData({ ...formData, [e.target.name]: e.target.value });
+    };
+
+    return (
+        <form onSubmit={handleSubmit} className={styles.form}>
+            <div className={styles.inputGroup}>
+                <label>Ad Soyad</label>
+                <input name="name" value={formData.name} onChange={handleChange} className={styles.input} required placeholder="Adınız" />
+            </div>
+
+            <div className={styles.inputGroup}>
+                <label>Email</label>
+                <input name="email" type="email" value={formData.email} onChange={handleChange} className={styles.input} placeholder="ornek@email.com" />
+            </div>
+
+            <div className={styles.inputGroup}>
+                <label>Telefon</label>
+                <input name="phone" type="tel" value={formData.phone} onChange={handleChange} className={styles.input} required placeholder="5XX XXX XX XX" />
+            </div>
+
+            <div className={styles.inputGroup}>
+                <label>Doğum Tarihi</label>
+                <input name="birthDate" type="date" value={formData.birthDate} onChange={handleChange} className={styles.input} required />
+            </div>
+
+            <div className={styles.inputGroup}>
+                <label>Şube</label>
+                <select name="branchId" value={formData.branchId} onChange={handleChange} className={styles.input}>
+                    <option value="">Seçiniz</option>
+                    {branches.map(b => (
+                        <option key={b.id} value={b.id}>{b.name}</option>
+                    ))}
+                </select>
+            </div>
+
+            <button type="submit" className={styles.btn}>Kaydet</button>
+        </form>
+    );
+}

src/app/admin/register/StudentList.tsx

@@ -0,0 +1,134 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from '../branches/branches.module.css';
+
+export function StudentList({ students, branches }: { students: any[], branches: any[] }) {
+    const router = useRouter();
+    const [showSensitive, setShowSensitive] = useState(false);
+    const [editingId, setEditingId] = useState<string | null>(null);
+    const [editForm, setEditForm] = useState<any>(null);
+
+    const handleDelete = async (id: string) => {
+        if (!confirm('Kaydı silmek istediğinize emin misiniz?')) return;
+        const res = await fetch(`/api/students/${id}`, { method: 'DELETE' });
+        if (res.ok) {
+            router.refresh();
+        } else {
+            alert('Silme işlemi başarısız oldu.');
+        }
+    };
+
+    const startEdit = (student: any) => {
+        setEditingId(student.id);
+        setEditForm({
+            name: student.name,
+            email: student.email || '',
+            phone: student.phone,
+            branchId: student.branchId || '',
+            birthDate: student.birthDate ? new Date(student.birthDate).toISOString().split('T')[0] : ''
+        });
+    };
+
+    const handleUpdate = async (e: React.FormEvent) => {
+        e.preventDefault();
+        const res = await fetch(`/api/students/${editingId}`, {
+            method: 'PATCH',
+            body: JSON.stringify(editForm),
+            headers: { 'Content-Type': 'application/json' }
+        });
+
+        if (res.ok) {
+            setEditingId(null);
+            router.refresh();
+        } else {
+            alert('Güncelleme başarısız oldu.');
+        }
+    };
+
+    const maskInfo = (text: string) => {
+        if (!text) return 'Yok';
+        if (showSensitive) return text;
+        return text.replace(/.(?=.{4})/g, '*');
+    };
+
+    return (
+        <div className={styles.list}>
+            <div style={{ marginBottom: '1rem', display: 'flex', justifyContent: 'flex-end' }}>
+                <button
+                    onClick={() => setShowSensitive(!showSensitive)}
+                    className={styles.btn}
+                    style={{ background: showSensitive ? '#666' : '#0056b3' }}
+                >
+                    {showSensitive ? 'Bilgileri Gizle' : 'Bilgileri Göster'}
+                </button>
+            </div>
+            {students.map(s => (
+                <div key={s.id} className={styles.card}>
+                    {editingId === s.id ? (
+                        <form onSubmit={handleUpdate} style={{ width: '100%', display: 'flex', gap: '1rem', flexWrap: 'wrap', alignItems: 'flex-end' }}>
+                            <div className={styles.inputGroup}>
+                                <label>Ad Soyad</label>
+                                <input
+                                    value={editForm.name}
+                                    onChange={e => setEditForm({ ...editForm, name: e.target.value })}
+                                    className={styles.input}
+                                    required
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Telefon</label>
+                                <input
+                                    value={editForm.phone}
+                                    onChange={e => setEditForm({ ...editForm, phone: e.target.value })}
+                                    className={styles.input}
+                                    required
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Email</label>
+                                <input
+                                    value={editForm.email}
+                                    onChange={e => setEditForm({ ...editForm, email: e.target.value })}
+                                    className={styles.input}
+                                />
+                            </div>
+                            <div className={styles.inputGroup}>
+                                <label>Şube</label>
+                                <select
+                                    value={editForm.branchId}
+                                    onChange={e => setEditForm({ ...editForm, branchId: e.target.value })}
+                                    className={styles.input}
+                                >
+                                    <option value="">Seçiniz</option>
+                                    {branches.map(b => (
+                                        <option key={b.id} value={b.id}>{b.name}</option>
+                                    ))}
+                                </select>
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button type="submit" className={styles.btn} style={{ background: '#2e7d32' }}>Kaydet</button>
+                                <button type="button" onClick={() => setEditingId(null)} className={styles.btn}>İptal</button>
+                            </div>
+                        </form>
+                    ) : (
+                        <>
+                            <div>
+                                <h3>{s.name}</h3>
+                                <p>
+                                    <strong>Tel:</strong> {maskInfo(s.phone)} |
+                                    <strong> Email:</strong> {maskInfo(s.email)}
+                                </p>
+                                <small>{s.branch?.name || 'Şube seçilmemiş'}</small>
+                            </div>
+                            <div style={{ display: 'flex', gap: '0.5rem' }}>
+                                <button onClick={() => startEdit(s)} className={styles.btn} style={{ background: '#ffa000' }}>Düzenle</button>
+                                <button onClick={() => handleDelete(s.id)} className={`${styles.btn} ${styles.btnDelete}`}>Sil</button>
+                            </div>
+                        </>
+                    )}
+                </div>
+            ))}
+        </div>
+    );
+}

src/app/admin/register/page.tsx

@@ -0,0 +1,27 @@
+import { prisma } from '@/infrastructure/db/prisma';
+import { RegisterForm } from './RegisterForm';
+import { StudentList } from './StudentList';
+import styles from '../branches/branches.module.css';
+
+export default async function Page() {
+    const [branches, students] = await Promise.all([
+        prisma.branch.findMany({ select: { id: true, name: true } }),
+        prisma.student.findMany({
+            include: { branch: true },
+            orderBy: { createdAt: 'desc' }
+        })
+    ]);
+
+    return (
+        <div className={styles.container}>
+            <div className={styles.header}>
+                <h1>Öğrenci Kayıt İşlemleri</h1>
+            </div>
+            <RegisterForm branches={branches} />
+            <div className={styles.header} style={{ marginTop: '2rem' }}>
+                <h2>Kayıtlı Öğrenciler</h2>
+            </div>
+            <StudentList students={students} branches={branches} />
+        </div>
+    );
+}

src/app/api/branches/[id]/route.ts

@@ -0,0 +1,42 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function DELETE(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        await prisma.branch.delete({
+            where: { id },
+        });
+        return NextResponse.json({ success: true });
+    } catch (error) {
+        return NextResponse.json({ error: 'Failed' }, { status: 500 });
+    }
+}
+
+export async function PUT(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        const json = await request.json();
+
+        // Explicitly selecting fields to update to avoid spreading unwanted fields (like id)
+        const branch = await prisma.branch.update({
+            where: { id },
+            data: {
+                name: json.name,
+                address: json.address,
+                phone: json.phone,
+                hallCount: (json.hallCount !== undefined && json.hallCount !== '') ? parseInt(json.hallCount.toString()) : undefined
+            },
+        });
+        return NextResponse.json(branch);
+    } catch (error: any) {
+        console.error('Branch update error:', error);
+        return NextResponse.json({ error: 'Failed to update branch', details: error.message }, { status: 500 });
+    }
+}

src/app/api/branches/route.ts

@@ -0,0 +1,27 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function GET() {
+    const branches = await prisma.branch.findMany({
+        orderBy: { createdAt: 'desc' }
+    });
+    return NextResponse.json(branches);
+}
+
+export async function POST(request: Request) {
+    try {
+        const json = await request.json();
+        // Validate?
+        const branch = await prisma.branch.create({
+            data: {
+                name: json.name,
+                address: json.address,
+                phone: json.phone,
+                hallCount: json.hallCount ? parseInt(json.hallCount) : undefined
+            }
+        });
+        return NextResponse.json(branch);
+    } catch (error: any) {
+        return NextResponse.json({ error: 'Failed to create branch', details: error.message }, { status: 500 });
+    }
+}

src/app/api/classes/[id]/route.ts

@@ -0,0 +1,39 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function PATCH(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        const json = await request.json();
+        const danceClass = await prisma.danceClass.update({
+            where: { id },
+            data: {
+                name: json.name,
+                description: json.description,
+                branchId: json.branchId,
+                instructorId: json.instructorId
+            },
+        });
+        return NextResponse.json({ success: true, danceClass });
+    } catch (error) {
+        return NextResponse.json({ error: 'Failed to update class' }, { status: 500 });
+    }
+}
+
+export async function DELETE(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        await prisma.danceClass.delete({
+            where: { id },
+        });
+        return NextResponse.json({ success: true });
+    } catch (error) {
+        return NextResponse.json({ error: 'Failed' }, { status: 500 });
+    }
+}

src/app/api/classes/route.ts

@@ -0,0 +1,27 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function GET() {
+    const classes = await prisma.danceClass.findMany({
+        include: { branch: true, instructor: true },
+        orderBy: { createdAt: 'desc' }
+    });
+    return NextResponse.json(classes);
+}
+
+export async function POST(request: Request) {
+    try {
+        const json = await request.json();
+        const cls = await prisma.danceClass.create({
+            data: {
+                name: json.name,
+                branchId: json.branchId, // required
+                instructorId: json.instructorId || undefined, // optional?
+            },
+        });
+        return NextResponse.json(cls);
+    } catch (error) {
+        console.error(error);
+        return NextResponse.json({ error: 'Failed' }, { status: 500 });
+    }
+}

src/app/api/instructors/[id]/route.ts

@@ -0,0 +1,38 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function PATCH(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        const json = await request.json();
+        const instructor = await prisma.instructor.update({
+            where: { id },
+            data: {
+                name: json.name,
+                bio: json.bio,
+                phone: json.phone
+            },
+        });
+        return NextResponse.json({ success: true, instructor });
+    } catch (error) {
+        return NextResponse.json({ error: 'Failed to update instructor' }, { status: 500 });
+    }
+}
+
+export async function DELETE(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        await prisma.instructor.delete({
+            where: { id },
+        });
+        return NextResponse.json({ success: true });
+    } catch (error) {
+        return NextResponse.json({ error: 'Failed' }, { status: 500 });
+    }
+}

src/app/api/instructors/route.ts

@@ -0,0 +1,22 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function GET() {
+    const instructors = await prisma.instructor.findMany({ orderBy: { createdAt: 'desc' } });
+    return NextResponse.json(instructors);
+}
+
+export async function POST(request: Request) {
+    try {
+        const json = await request.json();
+        const instructor = await prisma.instructor.create({
+            data: {
+                name: json.name,
+                bio: json.bio,
+            },
+        });
+        return NextResponse.json(instructor);
+    } catch (error) {
+        return NextResponse.json({ error: 'Failed' }, { status: 500 });
+    }
+}

src/app/api/lessons/route.ts

@@ -0,0 +1,65 @@
+import { prisma } from "@/infrastructure/db/prisma";
+import { NextResponse } from "next/server";
+
+export async function GET() {
+    try {
+        const lessons = await prisma.lesson.findMany({
+            include: {
+                instructor: true,
+                branch: true,
+                class: true,
+            },
+        });
+        return NextResponse.json(lessons);
+    } catch (error) {
+        return NextResponse.json({ error: "Dersler yüklenemedi" }, { status: 500 });
+    }
+}
+
+export async function POST(request: Request) {
+    try {
+        const json = await request.json();
+        const { startTime, endTime, instructorId, branchId, classId, type, hallNumber, occurrenceCount = 1, period = 'NONE' } = json;
+
+        const start = new Date(startTime);
+        const end = new Date(endTime);
+        const lessons = [];
+
+        for (let i = 0; i < occurrenceCount; i++) {
+            const currentStart = new Date(start);
+            const currentEnd = new Date(end);
+
+            if (period === 'DAILY') {
+                currentStart.setDate(start.getDate() + i);
+                currentEnd.setDate(end.getDate() + i);
+            } else if (period === 'WEEKLY') {
+                currentStart.setDate(start.getDate() + (i * 7));
+                currentEnd.setDate(end.getDate() + (i * 7));
+            } else if (period === 'MONTHLY') {
+                currentStart.setMonth(start.getMonth() + i);
+                currentEnd.setMonth(end.getMonth() + i);
+            } else if (period === 'SIX_MONTHLY') {
+                currentStart.setMonth(start.getMonth() + (i * 6));
+                currentEnd.setMonth(end.getMonth() + (i * 6));
+            }
+
+            const lesson = await prisma.lesson.create({
+                data: {
+                    startTime: currentStart,
+                    endTime: currentEnd,
+                    type,
+                    hallNumber: parseInt(hallNumber),
+                    branchId,
+                    instructorId,
+                    classId: classId || null,
+                }
+            });
+            lessons.push(lesson);
+        }
+
+        return NextResponse.json({ message: `${lessons.length} ders başarıyla oluşturuldu`, lessons });
+    } catch (error: any) {
+        console.error('Lesson creation error:', error);
+        return NextResponse.json({ error: "Ders oluşturulamadı", details: error.message }, { status: 500 });
+    }
+}

src/app/api/login/route.ts

@@ -0,0 +1,44 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+import { comparePassword, encrypt } from '@/lib/auth';
+import { cookies } from 'next/headers';
+
+export async function POST(request: Request) {
+    try {
+        const body = await request.json();
+        const { username, password } = body;
+
+        if (!username || !password) {
+            return NextResponse.json({ error: 'Missing fields' }, { status: 400 });
+        }
+
+        const user = await prisma.user.findUnique({ where: { username } });
+
+        if (!user) {
+            return NextResponse.json({ error: 'Invalid credentials' }, { status: 401 });
+        }
+
+        const isValid = await comparePassword(password, user.password);
+        if (!isValid) {
+            return NextResponse.json({ error: 'Invalid credentials' }, { status: 401 });
+        }
+
+        const expires = new Date(Date.now() + 24 * 60 * 60 * 1000); // 1 day
+        const token = await encrypt({ userId: user.id, username: user.username, expires });
+
+        // Set cookie
+        const cookieStore = await cookies();
+        cookieStore.set('admin_session', token, {
+            expires,
+            httpOnly: true,
+            path: '/',
+            secure: process.env.NODE_ENV === 'production',
+            sameSite: 'lax'
+        });
+
+        return NextResponse.json({ success: true });
+    } catch (error) {
+        console.error('Login error:', error);
+        return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
+    }
+}

src/app/api/register/route.ts

@@ -0,0 +1,28 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function POST(request: Request) {
+    try {
+        const json = await request.json();
+
+        // Basic validation
+        if (!json.name || !json.phone || !json.birthDate) {
+            return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
+        }
+
+        const student = await prisma.student.create({
+            data: {
+                name: json.name,
+                email: json.email || null,
+                phone: json.phone,
+                birthDate: new Date(json.birthDate), // Ensure date format
+                branchId: json.branchId || null
+            },
+        });
+
+        return NextResponse.json({ success: true, student });
+    } catch (error) {
+        console.error('Registration error:', error);
+        return NextResponse.json({ error: 'Failed to register' }, { status: 500 });
+    }
+}

src/app/api/students/[id]/route.ts

@@ -0,0 +1,42 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/infrastructure/db/prisma';
+
+export async function PATCH(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        const json = await request.json();
+        const student = await prisma.student.update({
+            where: { id },
+            data: {
+                name: json.name,
+                email: json.email || null,
+                phone: json.phone,
+                birthDate: json.birthDate ? new Date(json.birthDate) : undefined,
+                branchId: json.branchId || null
+            },
+        });
+        return NextResponse.json({ success: true, student });
+    } catch (error: any) {
+        console.error('Update error:', error);
+        return NextResponse.json({ error: 'Failed to update student', details: error.message }, { status: 500 });
+    }
+}
+
+export async function DELETE(
+    request: Request,
+    { params }: { params: Promise<{ id: string }> }
+) {
+    try {
+        const { id } = await params;
+        await prisma.student.delete({
+            where: { id },
+        });
+        return NextResponse.json({ success: true });
+    } catch (error) {
+        console.error('Delete error:', error);
+        return NextResponse.json({ error: 'Failed to delete student' }, { status: 500 });
+    }
+}

src/app/globals.css

@@ -0,0 +1,16 @@
+body {
+  margin: 0;
+  padding: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+  background-color: #f5f5f5;
+  color: #333;
+}
+
+a {
+  text-decoration: none;
+  color: inherit;
+}
+
+* {
+  box-sizing: border-box;
+}

src/app/layout.tsx

@@ -0,0 +1,32 @@
+import type { Metadata } from "next";
+import { Geist, Geist_Mono } from "next/font/google";
+import "./globals.css";
+
+const geistSans = Geist({
+  variable: "--font-geist-sans",
+  subsets: ["latin"],
+});
+
+const geistMono = Geist_Mono({
+  variable: "--font-geist-mono",
+  subsets: ["latin"],
+});
+
+export const metadata: Metadata = {
+  title: "Create Next App",
+  description: "Generated by create next app",
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <body className={`${geistSans.variable} ${geistMono.variable}`}>
+        {children}
+      </body>
+    </html>
+  );
+}

src/app/login/login.module.css

@@ -0,0 +1,63 @@
+.container {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  height: 100vh;
+  background-color: #f5f5f5;
+}
+
+.card {
+  background: white;
+  padding: 2rem;
+  border-radius: 12px;
+  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
+  width: 100%;
+  max-width: 400px;
+}
+
+.title {
+  text-align: center;
+  margin-bottom: 2rem;
+  color: #333;
+}
+
+.formGroup {
+  margin-bottom: 1.5rem;
+}
+
+.label {
+  display: block;
+  margin-bottom: 0.5rem;
+  color: #555;
+  font-weight: 500;
+}
+
+.input {
+  width: 100%;
+  padding: 0.75rem;
+  border: 1px solid #ddd;
+  border-radius: 6px;
+  font-size: 1rem;
+}
+
+.button {
+  width: 100%;
+  padding: 0.75rem;
+  background-color: #0070f3;
+  color: white;
+  border: none;
+  border-radius: 6px;
+  font-size: 1rem;
+  cursor: pointer;
+  transition: background 0.2s;
+}
+
+.button:hover {
+  background-color: #005bb5;
+}
+
+.error {
+  color: red;
+  margin-bottom: 1rem;
+  text-align: center;
+}

src/app/login/page.tsx

@@ -0,0 +1,57 @@
+'use client';
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import styles from './login.module.css';
+
+export default function LoginPage() {
+    const [username, setUsername] = useState('');
+    const [password, setPassword] = useState('');
+    const [error, setError] = useState('');
+    const router = useRouter();
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault();
+        setError('');
+
+        const res = await fetch('/api/login', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ username, password }),
+        });
+
+        if (res.ok) {
+            router.push('/admin/dashboard');
+        } else {
+            const data = await res.json();
+            setError(data.error || 'Login failed');
+        }
+    };
+
+    return (
+        <div className={styles.container}>
+            <form onSubmit={handleSubmit} className={styles.card}>
+                <h1 className={styles.title}>Admin Login</h1>
+                {error && <div className={styles.error}>{error}</div>}
+                <div className={styles.formGroup}>
+                    <label className={styles.label}>Username</label>
+                    <input
+                        className={styles.input}
+                        type="text"
+                        value={username}
+                        onChange={(e) => setUsername(e.target.value)}
+                    />
+                </div>
+                <div className={styles.formGroup}>
+                    <label className={styles.label}>Password</label>
+                    <input
+                        className={styles.input}
+                        type="password"
+                        value={password}
+                        onChange={(e) => setPassword(e.target.value)}
+                    />
+                </div>
+                <button type="submit" className={styles.button}>Login</button>
+            </form>
+        </div>
+    );
+}

src/app/page.module.css

@@ -0,0 +1,90 @@
+.page {
+  --primary: #8ab4f8;
+  --secondary: #202124;
+  --accent: #f28b82;
+  --bg: #000000;
+  --white: #ffffff;
+  --text: #e8eaed;
+  --text-muted: #9aa0a6;
+
+  min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+  background: var(--bg);
+  font-family: var(--font-outfit, 'Outfit', sans-serif);
+  color: var(--text);
+}
+
+.nav {
+  padding: 0.75rem 2rem;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  background: #000000;
+  border-bottom: 1px solid #3c4043;
+  position: sticky;
+  top: 0;
+  z-index: 1000;
+}
+
+.logo {
+  font-size: 1.2rem;
+  font-weight: 700;
+  color: #e8eaed;
+  letter-spacing: -0.5px;
+}
+
+.adminLink {
+  padding: 0.6rem 1.2rem;
+  background: var(--secondary);
+  color: white;
+  border-radius: 8px;
+  text-decoration: none;
+  font-weight: 600;
+  transition: all 0.3s;
+}
+
+.adminLink:hover {
+  background: var(--primary);
+  transform: translateY(-2px);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+}
+
+.main {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+}
+
+.hero {
+  text-align: center;
+  max-width: 800px;
+  margin: 0 auto;
+}
+
+.hero h1 {
+  font-size: 3.5rem;
+  font-weight: 900;
+  margin-bottom: 1rem;
+  color: #111;
+  letter-spacing: -2px;
+}
+
+.hero p {
+  font-size: 1.25rem;
+  color: var(--text-muted);
+}
+
+.footer {
+  display: none;
+}
+
+@media (max-width: 768px) {
+  .nav {
+    padding: 1rem 2rem;
+  }
+
+  .hero h1 {
+    font-size: 2.5rem;
+  }
+}

src/app/page.tsx

@@ -0,0 +1,57 @@
+import { prisma } from "@/infrastructure/db/prisma";
+import { ScheduleCalendar } from "@/components/ScheduleCalendar";
+import Link from "next/link";
+import styles from "./page.module.css";
+
+export default async function Home() {
+  // Calculate start and end of current week
+  const now = new Date();
+  const dayOfWeek = now.getDay(); // 0 is Sunday
+  const diff = now.getDate() - dayOfWeek + (dayOfWeek === 0 ? -6 : 1); // Adjust to Monday
+  const startOfWeek = new Date(now.setDate(diff));
+  startOfWeek.setHours(0, 0, 0, 0);
+
+  const endOfWeek = new Date(startOfWeek);
+  endOfWeek.setDate(endOfWeek.getDate() + 7);
+
+  // Get the first branch to determine hallCount (or you could add a selector)
+  const branch = await prisma.branch.findFirst();
+  const hallCount = branch?.hallCount || 1;
+
+  const lessons = await prisma.lesson.findMany({
+    where: {
+      startTime: {
+        gte: startOfWeek,
+        lt: endOfWeek,
+      },
+    },
+    include: {
+      instructor: true,
+      branch: true,
+      class: true,
+    },
+    orderBy: {
+      startTime: 'asc',
+    },
+  });
+
+  return (
+    <div className={styles.page}>
+      <nav className={styles.nav}>
+        <div className={styles.logo}>{branch?.name || "Dance School"}</div>
+        <Link href="/admin/dashboard" className={styles.adminLink}>
+          Yönetici Paneli
+        </Link>
+      </nav>
+
+      <main className={styles.main}>
+
+        <ScheduleCalendar lessons={lessons} hallCount={hallCount} branchId={branch?.id} />
+      </main>
+
+      <footer className={styles.footer}>
+        <p>&copy; {new Date().getFullYear()} Dance School Yönetim Sistemi. Tüm hakları saklıdır.</p>
+      </footer>
+    </div>
+  );
+}

src/components/ScheduleCalendar.module.css

@@ -0,0 +1,213 @@
+.container {
+    width: 100%;
+    height: 100vh;
+    background-color: #000000;
+    color: #e8eaed;
+    font-family: var(--font-outfit, 'Outfit', -apple-system, sans-serif);
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+}
+
+.title {
+    text-align: center;
+    padding: 0.75rem 0;
+    margin: 0;
+    font-size: 1.25rem;
+    font-weight: 500;
+    border-bottom: 1px solid #3c4043;
+}
+
+.calendarWrapper {
+    flex: 1;
+    overflow: auto;
+    position: relative;
+    display: flex;
+    flex-direction: column;
+}
+
+.stickyHeader {
+    position: sticky;
+    top: 0;
+    z-index: 100;
+    background: #000;
+    border-bottom: 1px solid #3c4043;
+}
+
+.headerRow {
+    display: flex;
+    margin-left: 60px;
+    /* Space for time axis */
+}
+
+.dayHeader {
+    flex: 1;
+    min-width: 120px;
+    text-align: center;
+    padding: 0.5rem 0;
+    border-right: 1px solid #3c4043;
+    font-size: 0.75rem;
+    color: #9aa0a6;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+}
+
+.dayHeader:last-child {
+    border-right: none;
+}
+
+.today .dayHeader {
+    color: #8ab4f8;
+    font-weight: 700;
+}
+
+.hallLabelsRow {
+    display: flex;
+    margin-left: 60px;
+    border-top: 1px solid rgba(60, 64, 67, 0.3);
+}
+
+.hallLabel {
+    flex: 1;
+    min-width: calc(120px / var(--hall-count, 1));
+    text-align: center;
+    font-size: 0.65rem;
+    color: #5f6368;
+    padding: 2px 0;
+    border-right: 1px solid rgba(60, 64, 67, 0.3);
+}
+
+.gridContainer {
+    position: relative;
+    display: flex;
+    min-height: 1440px;
+    /* 24 hours * 60px */
+}
+
+.timeAxis {
+    width: 60px;
+    background: #000;
+    border-right: 1px solid #3c4043;
+    position: sticky;
+    left: 0;
+    z-index: 50;
+    /* Ensure time axis fills the height */
+    height: 1440px;
+}
+
+.timeLabel {
+    height: 60px;
+    display: flex;
+    align-items: flex-start;
+    justify-content: flex-end;
+    padding-right: 8px;
+    font-size: 0.7rem;
+    color: #9aa0a6;
+    /* Center the text vertically at the hour mark */
+    position: relative;
+    top: -8px;
+}
+
+.mainGrid {
+    flex: 1;
+    display: flex;
+    background-image: linear-gradient(#3c4043 1px, transparent 1px);
+    background-size: 100% 60px;
+    position: relative;
+}
+
+.dayColumn {
+    flex: 1;
+    min-width: 120px;
+    border-right: 1px solid #3c4043;
+    display: flex;
+    position: relative;
+}
+
+.dayColumn:last-child {
+    border-right: none;
+}
+
+.hallColumn {
+    flex: 1;
+    position: relative;
+    border-right: 1px solid rgba(60, 64, 67, 0.2);
+}
+
+.hallColumn:last-child {
+    border-right: none;
+}
+
+.nowLine {
+    position: absolute;
+    left: 0;
+    right: 0;
+    height: 2px;
+    background: #ea4335;
+    z-index: 10;
+    pointer-events: none;
+}
+
+.nowLine::before {
+    content: '';
+    position: absolute;
+    left: -4px;
+    top: -4px;
+    width: 10px;
+    height: 10px;
+    background: #ea4335;
+    border-radius: 50%;
+}
+
+.lessonCard {
+    position: absolute;
+    left: 3px;
+    right: 3px;
+    background: rgba(138, 180, 248, 0.2);
+    border: 1px solid #8ab4f8;
+    border-radius: 4px;
+    padding: 4px;
+    font-size: 0.7rem;
+    overflow: hidden;
+    cursor: pointer;
+    z-index: 1;
+    display: flex;
+    flex-direction: column;
+    gap: 1px;
+}
+
+.lessonCard:hover {
+    background: rgba(138, 180, 248, 0.3);
+    z-index: 5;
+}
+
+.lessonCard[data-type="Individual"] {
+    background: rgba(242, 139, 130, 0.2);
+    border-color: #f28b82;
+}
+
+.lessonTime {
+    color: #8ab4f8;
+    font-weight: 500;
+    font-size: 0.65rem;
+}
+
+.lessonCard[data-type="Individual"] .lessonTime {
+    color: #f28b82;
+}
+
+.lessonTitle {
+    font-weight: 600;
+    color: #fff;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+    overflow: hidden;
+}
+
+.lessonMeta {
+    color: #9aa0a6;
+    font-size: 0.6rem;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+    overflow: hidden;
+}

src/components/ScheduleCalendar.tsx

@@ -0,0 +1,380 @@
+'use client';
+import { useMemo, useEffect, useRef, useState } from 'react';
+import { useRouter } from 'next/navigation';
+
+interface Lesson {
+    id: string;
+    name?: string | null;
+    startTime: Date | string;
+    endTime: Date | string;
+    type: string;
+    class?: { name: string } | null;
+    instructor: { name: string };
+    branch: { name: string; hallCount?: number | null };
+    hallNumber?: number | null;
+}
+
+export function ScheduleCalendar({ lessons, hallCount = 1, branchId }: { lessons: Lesson[], hallCount?: number, branchId?: string }) {
+    const router = useRouter();
+    const days = ['Pazartesi', 'Salı', 'Çarşamba', 'Perşembe', 'Cuma', 'Cumartesi', 'Pazar'];
+    const hours = Array.from({ length: 24 }, (_, i) => i);
+
+    const scrollRef = useRef<HTMLDivElement>(null);
+    const [now, setNow] = useState(new Date());
+
+    // Modal State
+    const [isModalOpen, setIsModalOpen] = useState(false);
+    const [selectedSlot, setSelectedSlot] = useState<{ dayIdx: number, hour: number, hNum: number } | null>(null);
+    const [instructors, setInstructors] = useState<any[]>([]);
+    const [classes, setClasses] = useState<any[]>([]);
+    const [formData, setFormData] = useState({
+        instructorId: '',
+        classId: '',
+        type: 'Group',
+        period: 'NONE',
+        occurrenceCount: 1,
+        duration: 60
+    });
+
+    useEffect(() => {
+        const timer = setInterval(() => setNow(new Date()), 60000);
+        if (scrollRef.current) {
+            const currentHour = now.getHours();
+            const scrollHour = Math.max(0, currentHour - 2);
+            scrollRef.current.scrollTop = scrollHour * 60;
+        }
+        return () => clearInterval(timer);
+    }, []);
+
+    const fetchFormData = async () => {
+        const [instRes, classRes] = await Promise.all([
+            fetch('/api/instructors'),
+            fetch('/api/classes')
+        ]);
+        const instData = await instRes.json();
+        const classData = await classRes.json();
+        setInstructors(instData);
+        setClasses(classData);
+    };
+
+    const handleSlotClick = (dayIdx: number, hour: number, hNum: number) => {
+        if (!branchId) return;
+        setSelectedSlot({ dayIdx, hour, hNum });
+        setIsModalOpen(true);
+        fetchFormData();
+    };
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault();
+        if (!selectedSlot || !branchId) return;
+
+        // Calculate actual date for the selected slot in the current week
+        const now = new Date();
+        const dayOfWeek = now.getDay();
+        const diff = now.getDate() - dayOfWeek + (dayOfWeek === 0 ? -6 : 1);
+        const startOfWeek = new Date(now.setDate(diff));
+
+        const startTime = new Date(startOfWeek);
+        startTime.setDate(startOfWeek.getDate() + selectedSlot.dayIdx);
+        startTime.setHours(selectedSlot.hour, 0, 0, 0);
+
+        const endTime = new Date(startTime);
+        endTime.setMinutes(startTime.getMinutes() + parseInt(formData.duration.toString()));
+
+        try {
+            const res = await fetch('/api/lessons', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({
+                    ...formData,
+                    branchId,
+                    hallNumber: selectedSlot.hNum,
+                    startTime,
+                    endTime
+                })
+            });
+
+            if (res.ok) {
+                setIsModalOpen(false);
+                router.refresh();
+            } else {
+                const errData = await res.json();
+                alert(`Ders oluşturulamadı: ${errData.details || errData.error || 'Bilinmeyen hata'}`);
+            }
+        } catch (error) {
+            console.error(error);
+        }
+    };
+
+    const nowTop = (now.getHours() * 60) + now.getMinutes();
+
+    const groupedLessons = useMemo(() => {
+        const groups: Record<number, Record<number, any[]>> = {};
+        lessons.forEach(lesson => {
+            const start = new Date(lesson.startTime);
+            const end = new Date(lesson.endTime);
+            let dayIndex = start.getDay() - 1;
+            if (dayIndex === -1) dayIndex = 6;
+            const hallNum = lesson.hallNumber || 1;
+            const top = (start.getHours() * 60) + start.getMinutes();
+            const bottom = (end.getHours() * 60) + end.getMinutes();
+            if (!groups[dayIndex]) groups[dayIndex] = {};
+            if (!groups[dayIndex][hallNum]) groups[dayIndex][hallNum] = [];
+            groups[dayIndex][hallNum].push({
+                ...lesson,
+                top,
+                height: Math.max(bottom - top, 20),
+                startTimeStr: start.toLocaleTimeString('tr-TR', { hour: '2-digit', minute: '2-digit' })
+            });
+        });
+        return groups;
+    }, [lessons]);
+
+    const timeWidth = 60;
+    const dayMinWidth = 180;
+
+    return (
+        <div style={{
+            width: '100%',
+            height: '100vh',
+            backgroundColor: '#000',
+            color: '#fff',
+            display: 'flex',
+            flexDirection: 'column',
+            overflow: 'hidden',
+            fontFamily: 'sans-serif'
+        }}>
+            <h1 style={{ textAlign: 'center', padding: '10px', margin: 0, fontSize: '1.2rem', borderBottom: '1px solid #333' }}>
+                Haftalık Ders Programı
+            </h1>
+
+            <div ref={scrollRef} style={{ flex: 1, overflow: 'auto', position: 'relative' }}>
+                <div style={{ position: 'sticky', top: 0, zIndex: 100, backgroundColor: '#000', borderBottom: '1px solid #333' }}>
+                    <div style={{ display: 'flex', marginLeft: timeWidth }}>
+                        {days.map((day, idx) => {
+                            const isToday = ((new Date().getDay() - 1 + 7) % 7) === idx;
+                            return (
+                                <div key={day} style={{
+                                    flex: 1,
+                                    minWidth: dayMinWidth,
+                                    textAlign: 'center',
+                                    padding: '8px 0',
+                                    borderRight: '1px solid #333',
+                                    fontSize: '0.8rem',
+                                    color: isToday ? '#8ab4f8' : '#9aa0a6',
+                                    fontWeight: isToday ? 'bold' : 'normal'
+                                }}>
+                                    {day}
+                                </div>
+                            );
+                        })}
+                    </div>
+                    {hallCount > 1 && (
+                        <div style={{ display: 'flex', marginLeft: timeWidth, borderTop: '1px solid #222' }}>
+                            {days.map((_, dIdx) => (
+                                <div key={dIdx} style={{ flex: 1, minWidth: dayMinWidth, display: 'flex' }}>
+                                    {Array.from({ length: hallCount }).map((_, hIdx) => (
+                                        <div key={hIdx} style={{
+                                            flex: 1,
+                                            textAlign: 'center',
+                                            fontSize: '0.6rem',
+                                            color: '#666',
+                                            borderRight: hIdx === hallCount - 1 ? '1px solid #333' : '1px solid #222',
+                                            padding: '4px 0',
+                                            backgroundColor: '#050505'
+                                        }}>
+                                            S{hIdx + 1}
+                                        </div>
+                                    ))}
+                                </div>
+                            ))}
+                        </div>
+                    )}
+                </div>
+
+                <div style={{ display: 'flex', minHeight: '1440px', position: 'relative' }}>
+                    <div style={{ width: timeWidth, position: 'sticky', left: 0, zIndex: 50, backgroundColor: '#000', borderRight: '1px solid #333' }}>
+                        {hours.map(h => (
+                            <div key={h} style={{ height: '60px', paddingRight: '5px', textAlign: 'right', fontSize: '0.7rem', color: '#666', paddingTop: '2px' }}>
+                                {h === 0 ? '12 AM' : h === 12 ? '12 PM' : h > 12 ? `${h - 12} PM` : `${h} AM`}
+                            </div>
+                        ))}
+                    </div>
+
+                    <div style={{ flex: 1, position: 'relative', display: 'flex', backgroundImage: 'linear-gradient(#222 1px, transparent 1px)', backgroundSize: '100% 60px' }}>
+                        <div style={{ position: 'absolute', top: nowTop, left: 0, right: 0, height: '2px', backgroundColor: 'red', zIndex: 40, pointerEvents: 'none' }}>
+                            <div style={{ position: 'absolute', left: '-5px', top: '-4px', width: '10px', height: '10px', borderRadius: '50%', backgroundColor: 'red' }} />
+                        </div>
+
+                        {days.map((_, dIdx) => (
+                            <div key={dIdx} style={{ flex: 1, minWidth: dayMinWidth, borderRight: '1px solid #333', position: 'relative', display: 'flex' }}>
+                                {Array.from({ length: hallCount }).map((_, hIdx) => {
+                                    const hNum = hIdx + 1;
+                                    return (
+                                        <div key={hIdx} style={{ flex: 1, position: 'relative', borderRight: hallCount > 1 ? '1px solid #111' : 'none' }}>
+                                            {/* Hoverable Slots */}
+                                            {hours.map(h => (
+                                                <div
+                                                    key={h}
+                                                    onClick={() => handleSlotClick(dIdx, h, hNum)}
+                                                    style={{ height: '60px', position: 'relative', cursor: 'pointer' }}
+                                                    className="slot-hover"
+                                                >
+                                                    <div className="plus-btn" style={{
+                                                        position: 'absolute',
+                                                        right: '5px',
+                                                        top: '5px',
+                                                        width: '20px',
+                                                        height: '20px',
+                                                        backgroundColor: 'rgba(255,255,255,0.1)',
+                                                        borderRadius: '50%',
+                                                        display: 'none',
+                                                        alignItems: 'center',
+                                                        justifyContent: 'center',
+                                                        fontSize: '12px'
+                                                    }}>+</div>
+                                                </div>
+                                            ))}
+
+                                            {groupedLessons[dIdx]?.[hNum]?.map(lesson => (
+                                                <div key={lesson.id} style={{
+                                                    position: 'absolute',
+                                                    top: lesson.top,
+                                                    height: lesson.height,
+                                                    left: '2px',
+                                                    right: '2px',
+                                                    backgroundColor: lesson.type === 'Individual' ? 'rgba(242, 139, 130, 0.2)' : 'rgba(138, 180, 248, 0.2)',
+                                                    borderLeft: `3px solid ${lesson.type === 'Individual' ? '#f28b82' : '#8ab4f8'}`,
+                                                    borderRadius: '4px',
+                                                    padding: '4px',
+                                                    fontSize: '0.7rem',
+                                                    overflow: 'hidden',
+                                                    zIndex: 10
+                                                }}>
+                                                    <div style={{ fontWeight: 'bold', fontSize: '0.6rem', opacity: 0.8 }}>{lesson.startTimeStr}</div>
+                                                    <div style={{ fontWeight: 'bold', margin: '2px 0' }}>{lesson.class?.name || lesson.name}</div>
+                                                    <div style={{ opacity: 0.6 }}>{lesson.instructor.name}</div>
+                                                </div>
+                                            ))}
+                                        </div>
+                                    );
+                                })}
+                            </div>
+                        ))}
+                    </div>
+                </div>
+            </div>
+
+            {/* Reservation Modal */}
+            {isModalOpen && (
+                <div style={{
+                    position: 'fixed',
+                    top: 0, left: 0, right: 0, bottom: 0,
+                    backgroundColor: 'rgba(0,0,0,0.8)',
+                    display: 'flex',
+                    alignItems: 'center',
+                    justifyContent: 'center',
+                    zIndex: 200
+                }}>
+                    <form onSubmit={handleSubmit} style={{
+                        backgroundColor: '#1e1e1e',
+                        padding: '2rem',
+                        borderRadius: '8px',
+                        width: '400px',
+                        border: '1px solid #333',
+                        display: 'flex',
+                        flexDirection: 'column',
+                        gap: '1rem'
+                    }}>
+                        <h3>Yeni Ders Rezervasyonu</h3>
+                        <p style={{ fontSize: '0.8rem', color: '#9aa0a6' }}>
+                            {days[selectedSlot!.dayIdx]} - Saat: {selectedSlot!.hour}:00 - Salon: {selectedSlot!.hNum}
+                        </p>
+
+                        <label>Eğitmen</label>
+                        <select
+                            required
+                            value={formData.instructorId}
+                            onChange={(e) => setFormData({ ...formData, instructorId: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="">Seçiniz</option>
+                            {instructors.map(i => <option key={i.id} value={i.id}>{i.name}</option>)}
+                        </select>
+
+                        <label>Sınıf (Opsiyonel)</label>
+                        <select
+                            value={formData.classId}
+                            onChange={(e) => setFormData({ ...formData, classId: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="">Seçiniz</option>
+                            {classes.map(c => <option key={c.id} value={c.id}>{c.name}</option>)}
+                        </select>
+
+                        <label>Ders Türü</label>
+                        <select
+                            value={formData.type}
+                            onChange={(e) => setFormData({ ...formData, type: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="Group">Grup Dersi</option>
+                            <option value="Individual">Özel Ders</option>
+                        </select>
+
+                        <label>Süre (Dakika)</label>
+                        <input
+                            type="number"
+                            value={formData.duration}
+                            onChange={(e) => setFormData({ ...formData, duration: parseInt(e.target.value) })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        />
+
+                        <label>Tekrar</label>
+                        <select
+                            value={formData.period}
+                            onChange={(e) => setFormData({ ...formData, period: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="NONE">Tek Seferlik</option>
+                            <option value="DAILY">Günlük</option>
+                            <option value="WEEKLY">Haftalık</option>
+                            <option value="MONTHLY">Aylık</option>
+                            <option value="SIX_MONTHLY">6 Aylık</option>
+                        </select>
+
+                        {formData.period !== 'NONE' && (
+                            <>
+                                <label>Tekrar Sayısı</label>
+                                <input
+                                    type="number"
+                                    value={formData.occurrenceCount}
+                                    onChange={(e) => setFormData({ ...formData, occurrenceCount: parseInt(e.target.value) })}
+                                    style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                                />
+                            </>
+                        )}
+
+                        <div style={{ display: 'flex', gap: '10px', marginTop: '10px' }}>
+                            <button type="submit" style={{ flex: 1, padding: '10px', backgroundColor: '#8ab4f8', color: '#000', border: 'none', borderRadius: '4px', fontWeight: 'bold', cursor: 'pointer' }}>
+                                Kaydet
+                            </button>
+                            <button type="button" onClick={() => setIsModalOpen(false)} style={{ flex: 1, padding: '10px', backgroundColor: 'transparent', color: '#fff', border: '1px solid #444', borderRadius: '4px', cursor: 'pointer' }}>
+                                İptal
+                            </button>
+                        </div>
+                    </form>
+                </div>
+            )}
+
+            <style jsx>{`
+                .slot-hover:hover .plus-btn {
+                    display: flex !important;
+                }
+                .slot-hover:hover {
+                    background-color: rgba(255,255,255,0.05);
+                }
+            `}</style>
+        </div>
+    );
+}

src/infrastructure/db/prisma.ts

@@ -0,0 +1,14 @@
+import { PrismaClient } from '@prisma/client';
+
+const globalForPrisma = global as unknown as { prisma: PrismaClient };
+
+const prismaInstance = globalForPrisma.prisma || new PrismaClient();
+
+if (process.env.NODE_ENV !== 'production') {
+    globalForPrisma.prisma = prismaInstance;
+    // Log models to verify generation
+    const models = Object.keys(prismaInstance).filter(k => !k.startsWith('_') && !k.startsWith('$'));
+    console.log('Prisma models available:', models);
+}
+
+export const prisma = prismaInstance;

src/lib/auth.ts

@@ -0,0 +1,32 @@
+import { SignJWT, jwtVerify } from 'jose';
+import bcrypt from 'bcryptjs';
+
+const secretKey = process.env.JWT_SECRET || 'super-secret-key-dance-school';
+const key = new TextEncoder().encode(secretKey);
+
+export async function encrypt(payload: any) {
+    return await new SignJWT(payload)
+        .setProtectedHeader({ alg: 'HS256' })
+        .setIssuedAt()
+        .setExpirationTime('24h')
+        .sign(key);
+}
+
+export async function decrypt(input: string): Promise<any> {
+    try {
+        const { payload } = await jwtVerify(input, key, {
+            algorithms: ['HS256'],
+        });
+        return payload;
+    } catch (error) {
+        return null;
+    }
+}
+
+export async function hashPassword(password: string) {
+    return await bcrypt.hash(password, 10);
+}
+
+export async function comparePassword(plain: string, hashed: string) {
+    return await bcrypt.compare(plain, hashed);
+}

src/middleware.ts

@@ -0,0 +1,29 @@
+import { NextResponse } from 'next/server';
+import type { NextRequest } from 'next/server';
+import { decrypt } from '@/lib/auth';
+
+export async function middleware(request: NextRequest) {
+    const path = request.nextUrl.pathname;
+
+    // Check for session cookie
+    const cookie = request.cookies.get('admin_session')?.value;
+    const session = cookie ? await decrypt(cookie) : null;
+
+    // Protect /admin routes
+    if (path.startsWith('/admin')) {
+        if (!session) {
+            return NextResponse.redirect(new URL('/login', request.nextUrl));
+        }
+    }
+
+    // Redirect already logged in users from /login to /admin/dashboard
+    if (path === '/login' && session) {
+        return NextResponse.redirect(new URL('/admin/dashboard', request.nextUrl));
+    }
+
+    return NextResponse.next();
+}
+
+export const config = {
+    matcher: ['/admin/:path*', '/login'],
+};

src/presentation/components/Sidebar.tsx

@@ -0,0 +1,42 @@
+'use client';
+import Link from 'next/link';
+import { usePathname, useRouter } from 'next/navigation';
+import styles from '@/app/admin/admin.module.css';
+
+export function Sidebar() {
+    const pathname = usePathname();
+    const router = useRouter();
+
+    const navItems = [
+        { name: 'Takvime Git 🗓️', href: '/' },
+        { name: 'Dashboard', href: '/admin/dashboard' },
+        { name: 'Şubeler', href: '/admin/branches' },
+        { name: 'Hocalar', href: '/admin/instructors' },
+        { name: 'Sınıflar', href: '/admin/classes' },
+        { name: 'Kayıt', href: '/admin/register' },
+    ];
+
+    const handleLogout = () => {
+        document.cookie = 'admin_session=; Max-Age=0; path=/;';
+        router.push('/login');
+        router.refresh();
+    };
+
+    return (
+        <aside className={styles.sidebar}>
+            <div className={styles.brand}>Dance School</div>
+            <nav className={styles.nav}>
+                {navItems.map((item) => (
+                    <Link
+                        key={item.href}
+                        href={item.href}
+                        className={`${styles.navLink} ${pathname.startsWith(item.href) ? styles.active : ''}`}
+                    >
+                        {item.name}
+                    </Link>
+                ))}
+            </nav>
+            <button onClick={handleLogout} className={styles.logoutBtn}>Çıkış Yap</button>
+        </aside>
+    );
+}

tsconfig.json

@@ -0,0 +1,34 @@
+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "react-jsx",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    ".next/dev/types/**/*.ts",
+    "**/*.mts"
+  ],
+  "exclude": ["node_modules"]
+}