feat: Add notification services for Email, Telegram, and WhatsApp

- Implement EmailNotifier for sending batch and test notifications via email.
- Implement TelegramNotifier for sending batch and test notifications via Telegram.
- Implement WahaNotifier for sending batch and test notifications via WhatsApp using WAHA API.
- Create migration for client_categories table and update clients table to include category_id.
- Create migration for notification_settings table to manage notification configurations.
- Add ClientCategorySeeder to populate default client categories.
- Create manifest.json for PWA support.
- Implement service worker (sw.js) for caching static assets and offline support.
- Add edit event view for modifying scheduled events.
- Create search results view for displaying search queries.
- Develop notification settings view for configuring notification channels and triggers.

app/Models/Client.php

@@ -7,6 +7,7 @@ namespace App\Models;
 use App\Enums\ClientStatus;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
@@ -18,13 +19,20 @@ class Client extends Model
         'name', 'email', 'phone', 'company',
         'ig_handle', 'tiktok_handle', 'youtube_handle',
         'address_line1', 'address_line2', 'city', 'state', 'postal_code', 'country',
-        'status', 'notes', 'avatar',
+        'status', 'category_id', 'notes', 'avatar',
     ];
 
     protected $casts = [
         'status' => ClientStatus::class,
     ];
 
+    // ── Relationships ────────────────────────────────────────────
+
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(ClientCategory::class, 'category_id');
+    }
+
     public function events(): HasMany
     {
         return $this->hasMany(Event::class);
@@ -45,6 +53,8 @@ class Client extends Model
         return $this->hasMany(MediaFile::class);
     }
 
+    // ── Accessors ────────────────────────────────────────────────
+
     public function getFullAddressAttribute(): string
     {
         return collect([

app/Models/ClientCategory.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Str;
+
+class ClientCategory extends Model
+{
+    protected $fillable = [
+        'name', 'slug', 'parent_id', 'icon', 'color',
+        'description', 'is_system', 'sort_order',
+    ];
+
+    protected $casts = [
+        'is_system'  => 'boolean',
+        'sort_order' => 'integer',
+    ];
+
+    // ── Relationships ────────────────────────────────────────────
+
+    public function parent(): BelongsTo
+    {
+        return $this->belongsTo(ClientCategory::class, 'parent_id');
+    }
+
+    public function children(): HasMany
+    {
+        return $this->hasMany(ClientCategory::class, 'parent_id')->orderBy('sort_order');
+    }
+
+    public function clients(): HasMany
+    {
+        return $this->hasMany(Client::class, 'category_id');
+    }
+
+    // ── Scopes ───────────────────────────────────────────────────
+
+    public function scopeRoots($query)
+    {
+        return $query->whereNull('parent_id')->orderBy('sort_order');
+    }
+
+    public function scopeTopLevel($query)
+    {
+        return $query->whereNull('parent_id');
+    }
+
+    // ── Accessors ────────────────────────────────────────────────
+
+    public function getFullNameAttribute(): string
+    {
+        return $this->parent
+            ? $this->parent->name . ' › ' . $this->name
+            : $this->name;
+    }
+
+    // ── Events ───────────────────────────────────────────────────
+
+    protected static function boot(): void
+    {
+        parent::boot();
+
+        static::creating(function (ClientCategory $cat): void {
+            if (empty($cat->slug)) {
+                $cat->slug = Str::slug($cat->name);
+            }
+        });
+    }
+}

app/Models/NotificationSetting.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class NotificationSetting extends Model
+{
+    protected $fillable = [
+        'name', 'channel', 'config', 'triggers',
+        'is_enabled', 'notify_before_hours',
+    ];
+
+    protected $casts = [
+        'config'               => 'array',
+        'triggers'             => 'array',
+        'is_enabled'           => 'boolean',
+        'notify_before_hours'  => 'integer',
+    ];
+
+    // ── Channel icons/labels ─────────────────────────────────────
+
+    public static array $channelMeta = [
+        'email'     => ['icon' => '✉️',  'label' => 'Email',     'color' => '#AEC6CF'],
+        'telegram'  => ['icon' => '✈️',  'label' => 'Telegram',  'color' => '#E8D5F5'],
+        'whatsapp'  => ['icon' => '💬',  'label' => 'WhatsApp',  'color' => '#B5EAD7'],
+    ];
+
+    public function getChannelIconAttribute(): string
+    {
+        return static::$channelMeta[$this->channel]['icon'] ?? '🔔';
+    }
+
+    public function getChannelLabelAttribute(): string
+    {
+        return static::$channelMeta[$this->channel]['label'] ?? ucfirst($this->channel);
+    }
+
+    // ── Trigger helpers ──────────────────────────────────────────
+
+    public static array $triggerMeta = [
+        'upcoming_event' => ['icon' => '📅', 'label' => 'Upcoming Events'],
+        'invoice_due'    => ['icon' => '🧾', 'label' => 'Invoice Due Date'],
+        'content_due'    => ['icon' => '🎬', 'label' => 'Content Target Date'],
+    ];
+
+    public function hasTrigger(string $trigger): bool
+    {
+        return in_array($trigger, $this->triggers ?? []);
+    }
+}