feat: Add frontend menu management system with permission filtering

src/app/Models/Menu.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class Menu extends Model
+{
+    protected $fillable = [
+        'name',
+        'slug',
+        'location',
+        'is_active',
+    ];
+
+    protected $casts = [
+        'is_active' => 'boolean',
+    ];
+
+    public function items(): HasMany
+    {
+        return $this->hasMany(MenuItem::class)->whereNull('parent_id')->orderBy('order');
+    }
+
+    public function allItems(): HasMany
+    {
+        return $this->hasMany(MenuItem::class)->orderBy('order');
+    }
+
+    public static function findBySlug(string $slug): ?self
+    {
+        return static::where('slug', $slug)->where('is_active', true)->first();
+    }
+
+    public static function findByLocation(string $location): ?self
+    {
+        return static::where('location', $location)->where('is_active', true)->first();
+    }
+}

src/app/Models/MenuItem.php

@@ -0,0 +1,90 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Facades\Auth;
+
+class MenuItem extends Model
+{
+    protected $fillable = [
+        'menu_id',
+        'parent_id',
+        'title',
+        'type',
+        'url',
+        'route',
+        'route_params',
+        'module',
+        'permission',
+        'icon',
+        'target',
+        'order',
+        'is_active',
+    ];
+
+    protected $casts = [
+        'route_params' => 'array',
+        'is_active' => 'boolean',
+        'order' => 'integer',
+    ];
+
+    public function menu(): BelongsTo
+    {
+        return $this->belongsTo(Menu::class);
+    }
+
+    public function parent(): BelongsTo
+    {
+        return $this->belongsTo(MenuItem::class, 'parent_id');
+    }
+
+    public function children(): HasMany
+    {
+        return $this->hasMany(MenuItem::class, 'parent_id')->orderBy('order');
+    }
+
+    public function getUrlAttribute(): ?string
+    {
+        return match ($this->type) {
+            'link' => $this->attributes['url'],
+            'route' => $this->route ? route($this->route, $this->route_params ?? []) : null,
+            'module' => $this->module ? route("{$this->module}.index") : null,
+            default => null,
+        };
+    }
+
+    public function isVisibleToUser(?User $user = null): bool
+    {
+        if (!$this->is_active) {
+            return false;
+        }
+
+        $user = $user ?? Auth::user();
+
+        if (!$user) {
+            return !$this->permission && !$this->module;
+        }
+
+        if ($user->hasRole('admin')) {
+            return true;
+        }
+
+        if ($this->permission) {
+            return $user->can($this->permission);
+        }
+
+        if ($this->module) {
+            return $user->can("{$this->module}.view");
+        }
+
+        return true;
+    }
+
+    public function getVisibleChildren(?User $user = null): \Illuminate\Support\Collection
+    {
+        return $this->children->filter(fn (MenuItem $item) => $item->isVisibleToUser($user));
+    }
+}