Initial Ladill Meet release.

Phases 0–18: core meetings, webinar, breakouts, team chat, live streaming, town hall, billing, and Ladill Mail calendar wiring.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/ChannelMessage.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\BelongsToOwner;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Str;
+
+class ChannelMessage extends Model
+{
+    use BelongsToOwner;
+
+    protected $table = 'meet_channel_messages';
+
+    protected $fillable = [
+        'uuid', 'owner_ref', 'channel_id', 'sender_ref', 'sender_name', 'body', 'parent_id', 'metadata',
+    ];
+
+    protected function casts(): array
+    {
+        return ['metadata' => 'array'];
+    }
+
+    protected static function booted(): void
+    {
+        static::creating(function (ChannelMessage $message) {
+            if (empty($message->uuid)) {
+                $message->uuid = (string) Str::uuid();
+            }
+        });
+    }
+
+    public function channel(): BelongsTo
+    {
+        return $this->belongsTo(Channel::class, 'channel_id');
+    }
+
+    public function parent(): BelongsTo
+    {
+        return $this->belongsTo(ChannelMessage::class, 'parent_id');
+    }
+
+    public function replies(): HasMany
+    {
+        return $this->hasMany(ChannelMessage::class, 'parent_id');
+    }
+}