different names in different dynamics

app/Http/Controllers/DynamicController.php

@@ -54,7 +54,7 @@ class DynamicController extends Controller
 
         $dynamic->load([
             'ledgers.media',
-            'participants',
+            'participants' => fn($query) => $query->withPivot('display_name'),
             'chat.messages.user',
             'chat.messages.media'
         ]);

app/Http/Controllers/LedgerController.php

@@ -64,7 +64,7 @@ class LedgerController extends Controller
 
         $activityService->updateCursor($request->user(), $ledger);
 
-        $dynamic->load('chat', 'participants');
+        $dynamic->load(['chat', 'participants' => fn($query) => $query->withPivot('display_name')]);
 
         $ledger->load([
             'media',

app/Http/Controllers/ParticipantController.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Dynamic;
+use Illuminate\Http\Request;
+
+class ParticipantController extends Controller
+{
+    public function update(Request $request, Dynamic $dynamic)
+    {
+        $request->validate([
+            'display_name' => ['required', 'string', 'max:255'],
+        ]);
+
+        $participant = $dynamic->participants()->where('user_id', $request->user()->id)->firstOrFail();
+
+        $dynamic->participants()->updateExistingPivot($participant->id, [
+            'display_name' => $request->input('display_name'),
+        ]);
+
+        return redirect()->back()->with('success', 'Display name updated successfully!');
+    }
+}

app/Models/Dynamic.php

@@ -21,7 +21,7 @@ class Dynamic extends Model
 
     public function participants(): BelongsToMany
     {
-        return $this->belongsToMany(User::class, 'participants')->withPivot('role');
+        return $this->belongsToMany(User::class, 'participants')->withPivot('role', 'display_name');
     }
 
     public function ledgers(): HasMany

app/Models/Participant.php

@@ -12,5 +12,6 @@ class Participant extends Pivot
         'user_id',
         'dynamic_id',
         'role',
+        'display_name',
     ];
 }

app/Models/User.php

@@ -49,6 +49,13 @@ class User extends Authenticatable implements PasskeyUser
         return $this->hasMany(ReadCursor::class);
     }
 
+    public function displayNameFor(Dynamic $dynamic): string
+    {
+        $participant = $dynamic->participants()->where('user_id', $this->id)->first();
+
+        return $participant?->pivot?->display_name ?? $this->name;
+    }
+
     /**
      * Get the attributes that should be cast.
      *