feat(cms): implement complete SysSiteCMS content management system

Initial implementation of the HomeSysPanel CMS built with Laravel 13.0.
Includes complete admin panel, content management, user authentication,
modular architecture for products/services/chatbot, and marketing tools.

Key features:
- User authentication with email verification and password reset
- Role-based access control (Admin/User with granular permissions)
- Content management (pages, news, FAQ, downloads, galleries, banners)
- Contact management system with subjects and responses
- Marketing tools (email campaigns, visitor analytics, social sharing)
- Modular architecture (Products, Services, Chatbot modules)
- AI Chatbot integration with OpenRouter.ai and LlamaCpp support
- Visitor tracking with geolocation
- SEO optimization with meta tags and Open Graph
- Responsive design with Bootstrap 5
- Dark mode support
- Maintenance mode
- Feature request system

app/Modules/Chatbot/Models/ChatbotConversation.php

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+<?php
+
+namespace App\Modules\Chatbot\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class ChatbotConversation extends Model
+{
+    protected $table = 'chatbot_conversations';
+
+    protected $fillable = [
+        'session_id',
+        'visitor_name',
+        'visitor_email',
+        'visitor_phone',
+        'visitor_city',
+        'status',
+        'rating',
+        'rating_comment',
+        'ended_at',
+    ];
+
+    protected $casts = [
+        'rating' => 'integer',
+        'ended_at' => 'datetime',
+    ];
+
+    /**
+     * Get the messages for this conversation.
+     */
+    public function messages(): HasMany
+    {
+        return $this->hasMany(ChatbotMessage::class, 'conversation_id');
+    }
+
+    /**
+     * Get or create a conversation by session ID.
+     */
+    public static function getOrCreateBySession(string $sessionId): self
+    {
+        return self::firstOrCreate(
+            ['session_id' => $sessionId],
+            ['session_id' => $sessionId]
+        );
+    }
+
+    /**
+     * Check if the conversation is active.
+     */
+    public function isActive(): bool
+    {
+        return $this->status === 'active';
+    }
+
+    /**
+     * Check if the conversation is ended.
+     */
+    public function isEnded(): bool
+    {
+        return $this->status === 'ended';
+    }
+
+    /**
+     * Get the conversation context as an array of messages for the API.
+     */
+    public function getContextForApi(int $maxMessages = 20): array
+    {
+        $messages = $this->messages()
+            ->orderBy('created_at', 'asc')
+            ->take($maxMessages)
+            ->get(['role', 'content']);
+
+        return $messages->map(fn($m) => [
+            'role' => $m->role,
+            'content' => $m->content,
+        ])->toArray();
+    }
+
+    /**
+     * Get the rating as star display text.
+     */
+    public function getRatingStarsAttribute(): string
+    {
+        if (!$this->rating) {
+            return '—';
+        }
+
+        $stars = str_repeat('★', $this->rating) . str_repeat('☆', 5 - $this->rating);
+        return $stars;
+    }
+}

app/Modules/Chatbot/Models/ChatbotKnowledge.php

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+<?php
+
+namespace App\Modules\Chatbot\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class ChatbotKnowledge extends Model
+{
+    protected $table = 'chatbot_knowledge';
+
+    protected $fillable = [
+        'title',
+        'content',
+        'restrictions',
+        'category',
+        'active',
+    ];
+
+    protected $casts = [
+        'active' => 'boolean',
+    ];
+
+    /**
+     * Available categories for knowledge base entries.
+     */
+    public static function getCategories(): array
+    {
+        return [
+            'company_info' => 'Informações da Empresa',
+            'products' => 'Produtos',
+            'services' => 'Serviços',
+            'faq' => 'Perguntas Frequentes',
+            'general' => 'Geral',
+        ];
+    }
+
+    /**
+     * Scope to get only active entries.
+     */
+    public function scopeActive($query)
+    {
+        return $query->where('active', true);
+    }
+
+    /**
+     * Get all knowledge as a formatted text for the system prompt.
+     */
+    public static function getFormattedKnowledge(): string
+    {
+        $entries = self::active()->orderBy('category')->orderBy('title')->get();
+
+        if ($entries->isEmpty()) {
+            return '';
+        }
+
+        $grouped = $entries->groupBy('category');
+        $categories = self::getCategories();
+        $output = '';
+
+        foreach ($grouped as $category => $items) {
+            $label = $categories[$category] ?? $category;
+            $output .= "\n## {$label}\n";
+            foreach ($items as $item) {
+                $output .= "- **{$item->title}**: {$item->content}\n";
+                if ($item->restrictions) {
+                    $output .= "  - ⚠️ Restrição: {$item->restrictions}\n";
+                }
+            }
+        }
+
+        return $output;
+    }
+}

app/Modules/Chatbot/Models/ChatbotMessage.php

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+<?php
+
+namespace App\Modules\Chatbot\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class ChatbotMessage extends Model
+{
+    protected $table = 'chatbot_messages';
+
+    protected $fillable = [
+        'conversation_id',
+        'role',
+        'content',
+        'tokens_used',
+    ];
+
+    /**
+     * Get the conversation this message belongs to.
+     */
+    public function conversation(): BelongsTo
+    {
+        return $this->belongsTo(ChatbotConversation::class, 'conversation_id');
+    }
+}

app/Modules/Chatbot/Models/ChatbotRule.php

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+<?php
+
+namespace App\Modules\Chatbot\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class ChatbotRule extends Model
+{
+    protected $table = 'chatbot_rules';
+
+    protected $fillable = [
+        'title',
+        'content',
+        'active',
+        'order',
+    ];
+
+    protected $casts = [
+        'active' => 'boolean',
+        'order'  => 'integer',
+    ];
+
+    /**
+     * Scope to get only active rules.
+     */
+    public function scopeActive($query)
+    {
+        return $query->where('active', true);
+    }
+
+    /**
+     * Get all active rules as a formatted text block for the system prompt.
+     *
+     * Returns an empty string when no active rule exists, so the prompt
+     * stays clean and the AI behaves as before.
+     */
+    public static function getFormattedRules(): string
+    {
+        $rules = self::active()->orderBy('order')->orderBy('id')->get();
+
+        if ($rules->isEmpty()) {
+            return '';
+        }
+
+        $output = '';
+        foreach ($rules as $rule) {
+            $output .= "- **{$rule->title}**: {$rule->content}\n";
+        }
+
+        return trim($output);
+    }
+}