feat: dynamic role-based permission system

- Add permissions & role_permissions tables with migration
- Add PermissionMiddleware for route-level access control
- Add CheckRole middleware for role-based fallback
- Add PermissionController with UI (Settings > Hak Akses Role)
- Add @canPermission Blade directive for view-level checks
- Convert all routes to use dynamic permission middleware
- Add canPermission() method to User model
- All access rights configurable via admin UI

app/Http/Controllers/Admin/PermissionController.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\DB;
+use Illuminate\View\View;
+
+class PermissionController extends Controller
+{
+    public function index(): View
+    {
+        $permissions = DB::table('permissions')
+            ->orderBy('group')
+            ->orderBy('id')
+            ->get()
+            ->groupBy('group');
+
+        $roles = ['admin', 'bk', 'wali_kelas', 'staff'];
+
+        $rolePermissions = [];
+        foreach ($roles as $role) {
+            $rolePermissions[$role] = DB::table('role_permissions')
+                ->where('role', $role)
+                ->pluck('permission_id')
+                ->toArray();
+        }
+
+        return view('settings.permissions', compact('permissions', 'roles', 'rolePermissions'));
+    }
+
+    public function update(Request $request): RedirectResponse
+    {
+        $data = $request->validate([
+            'permissions' => ['nullable', 'array'],
+            'permissions.*' => ['array'],
+        ]);
+
+        // Clear all role_permissions first
+        DB::table('role_permissions')->delete();
+
+        $now = now();
+
+        if (! empty($data['permissions'])) {
+            foreach ($data['permissions'] as $role => $permissionIds) {
+                foreach ($permissionIds as $permissionId) {
+                    DB::table('role_permissions')->insert([
+                        'role' => $role,
+                        'permission_id' => (int) $permissionId,
+                        'created_at' => $now,
+                        'updated_at' => $now,
+                    ]);
+                }
+            }
+        }
+
+        // Always give admin all permissions
+        $allPermissionIds = DB::table('permissions')->pluck('id');
+        foreach ($allPermissionIds as $pid) {
+            DB::table('role_permissions')->insertOrIgnore([
+                'role' => 'admin',
+                'permission_id' => $pid,
+                'created_at' => $now,
+                'updated_at' => $now,
+            ]);
+        }
+
+        // Clear cache
+        foreach (['admin', 'bk', 'wali_kelas', 'staff'] as $role) {
+            Cache::forget('role_permissions:' . $role);
+        }
+
+        return redirect()->route('settings.permissions')
+            ->with('success', 'Hak akses berhasil diperbarui.');
+    }
+}

app/Http/Middleware/CheckRole.php

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+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class CheckRole
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next, string ...$roles): Response
+    {
+        $user = $request->user();
+
+        if (! $user) {
+            abort(403, 'Unauthorized.');
+        }
+
+        foreach ($roles as $role) {
+            if ($user->role === $role) {
+                return $next($request);
+            }
+        }
+
+        abort(403, 'Anda tidak memiliki izin untuk mengakses halaman ini.');
+    }
+}

app/Http/Middleware/PermissionMiddleware.php

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+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Cache;
+use Symfony\Component\HttpFoundation\Response;
+
+class PermissionMiddleware
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next, string ...$permissions): Response
+    {
+        $user = $request->user();
+
+        if (! $user) {
+            abort(403, 'Unauthorized.');
+        }
+
+        // Admin always has all permissions
+        if ($user->role === 'admin') {
+            return $next($request);
+        }
+
+        // Cache role permissions (cleared when role_permissions changes)
+        $rolePermissions = Cache::remember('role_permissions:' . $user->role, 3600, function () use ($user) {
+            return \DB::table('role_permissions')
+                ->join('permissions', 'role_permissions.permission_id', '=', 'permissions.id')
+                ->where('role_permissions.role', $user->role)
+                ->pluck('permissions.key')
+                ->toArray();
+        });
+
+        foreach ($permissions as $permission) {
+            if (in_array($permission, $rolePermissions)) {
+                return $next($request);
+            }
+        }
+
+        abort(403, 'Anda tidak memiliki izin untuk mengakses halaman ini.');
+    }
+}