Answer the inbox from the panel, with templates

A reply starts from a template filled in the language the person wrote in,
is sent by the application when it has a mailer that delivers or handed to
the replier's mail program otherwise, and is recorded on the submission.
The same is available through the API.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Models/Application.php

@@ -12,6 +12,7 @@ use Illuminate\Database\Eloquent\Builder;
 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;
 use Illuminate\Support\Facades\Config;
 
@@ -59,6 +60,14 @@ class Application extends Model
     /**
      * @return BelongsTo<User, $this>
      */
+    /**
+     * @return HasMany<ApplicationReply, $this>
+     */
+    public function replies(): HasMany
+    {
+        return $this->hasMany(ApplicationReply::class)->latest('id');
+    }
+
     public function handler(): BelongsTo
     {
         return $this->belongsTo(User::class, 'handled_by');