messages implemented

app/Models/ConversationParticipant.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * @property int         $id
+ * @property int         $conversation_id
+ * @property int         $user_id
+ * @property string      $role           member|admin
+ * @property \Carbon\Carbon|null $last_read_at
+ * @property bool        $is_muted
+ * @property bool        $is_archived
+ * @property bool        $is_pinned
+ * @property \Carbon\Carbon|null $pinned_at
+ * @property \Carbon\Carbon $joined_at
+ * @property \Carbon\Carbon|null $left_at
+ */
+class ConversationParticipant extends Model
+{
+    use HasFactory;
+
+    public $timestamps = false;
+
+    protected $fillable = [
+        'conversation_id',
+        'user_id',
+        'role',
+        'last_read_at',
+        'is_muted',
+        'is_archived',
+        'is_pinned',
+        'pinned_at',
+        'joined_at',
+        'left_at',
+    ];
+
+    protected $casts = [
+        'last_read_at' => 'datetime',
+        'is_muted'     => 'boolean',
+        'is_archived'  => 'boolean',
+        'is_pinned'    => 'boolean',
+        'pinned_at'    => 'datetime',
+        'joined_at'    => 'datetime',
+        'left_at'      => 'datetime',
+    ];
+
+    // ── Relationships ────────────────────────────────────────────────────────
+
+    public function conversation(): BelongsTo
+    {
+        return $this->belongsTo(Conversation::class);
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}