feat(editor): per-platform media assignment UI

app/Actions/Post/UpdatePost.php

@@ -49,20 +49,20 @@ public static function execute(Workspace $workspace, Post $post, array $data): a
 
                 foreach (data_get($data, 'platforms', []) as $platformData) {
                     $updateData = ['enabled' => true];
+                    $needsExistingRow = data_get($platformData, 'meta') !== null || Arr::has($platformData, 'media_ids');
+                    $postPlatform = $needsExistingRow
+                        ? $post->postPlatforms()->where('id', data_get($platformData, 'id'))->first()
+                        : null;
 
                     if (data_get($platformData, 'content_type') !== null) {
                         $updateData['content_type'] = data_get($platformData, 'content_type');
                     }
 
-                    if (data_get($platformData, 'meta') !== null) {
-                        $postPlatform = $post->postPlatforms()->where('id', data_get($platformData, 'id'))->first();
-
-                        if ($postPlatform) {
-                            $updateData['meta'] = array_filter(
-                                array_merge($postPlatform->meta ?? [], data_get($platformData, 'meta') ?? []),
-                                fn (mixed $value): bool => $value !== null,
-                            );
-                        }
+                    if (data_get($platformData, 'meta') !== null && $postPlatform) {
+                        $updateData['meta'] = array_filter(
+                            array_merge($postPlatform->meta ?? [], data_get($platformData, 'meta') ?? []),
+                            fn (mixed $value): bool => $value !== null,
+                        );
                     }
 
                     $post->postPlatforms()
@@ -74,11 +74,11 @@ public static function execute(Workspace $workspace, Post $post, array $data): a
                     // client that never sends it must not accidentally clear every
                     // platform's scoping), while an explicit empty array clears it
                     // back to "publish every media item on the post" (see
-                    // PostPlatform::scopedMediaItems()).
-                    if (Arr::has($platformData, 'media_ids')) {
-                        $postPlatform = $post->postPlatforms()->where('id', data_get($platformData, 'id'))->first();
-
-                        $postPlatform?->media()->sync(data_get($platformData, 'media_ids', []));
+                    // PostPlatform::scopedMediaItems()). $postPlatform is already
+                    // resolved above via $needsExistingRow when media_ids is present,
+                    // no need to re-fetch it here.
+                    if (Arr::has($platformData, 'media_ids') && $postPlatform) {
+                        $postPlatform->media()->sync(data_get($platformData, 'media_ids', []));
                     }
                 }
             }

app/Http/Controllers/App/PostController.php

@@ -248,7 +248,13 @@ public function edit(Request $request, Post $post): Response|RedirectResponse
             SyncPostPlatforms::execute($post);
         }
 
-        $post->load(['postPlatforms.socialAccount', 'labels']);
+        $post->load(['postPlatforms.socialAccount', 'postPlatforms.media', 'labels']);
+
+        // `media_ids` is only appended here, not globally on the model, so the
+        // Index/Calendar listings (which don't eager-load `media`) don't take
+        // an unwanted lazy-load hit on every post_platform they render.
+        $post->postPlatforms->each(fn (PostPlatform $postPlatform) => $postPlatform->append('media_ids'));
+
         $socialAccounts = $workspace->socialAccounts()->active()->get();
         $labels = $workspace->labels;
         $signatures = $workspace->signatures;

app/Http/Requests/App/Post/UpdatePostRequest.php

@@ -55,6 +55,11 @@ public function rules(): array
                 'string',
                 Rule::in(array_column(ContentType::cases(), 'value')),
             ],
+            // Per-platform media assignment (Edit.vue's media toggle grid). An
+            // id must be one of the media items this same request is saving on
+            // the post, never an arbitrary/unrelated media id (IDOR guard).
+            'platforms.*.media_ids' => ['sometimes', 'array'],
+            'platforms.*.media_ids.*' => ['string', Rule::in($this->postMediaIds())],
             ...PostPlatformMetaRules::rules(),
             'label_ids' => ['sometimes', 'array'],
             'label_ids.*' => ['uuid', Rule::exists('workspace_labels', 'id')->where('workspace_id', $this->user()->currentWorkspace->id)],
@@ -150,6 +155,17 @@ private function addMediaCompatibilityErrors(Validator $validator): void
         }
     }
 
+    /**
+     * The media ids this request is saving on the post itself, the only ids
+     * a `platforms.*.media_ids` entry is allowed to reference.
+     *
+     * @return array<int, string>
+     */
+    private function postMediaIds(): array
+    {
+        return collect($this->input('media', []))->pluck('id')->filter()->all();
+    }
+
     /**
      * @return Collection<int|string, Platform>
      */

app/Models/PostPlatform.php

@@ -104,15 +104,30 @@ public function scopedMediaItems(): Collection
     }
 
     /**
-     * Only platforms still enabled for publishing — disabled ones are
+     * Only platforms still enabled for publishing (disabled ones are
      * excluded from PublishPost, so anything else that mirrors publish
-     * eligibility (previews, validation, proactive checks) must too.
+     * eligibility (previews, validation, proactive checks) must too).
      */
     public function scopeEnabled(Builder $query): Builder
     {
         return $query->where('post_platforms.enabled', true);
     }
 
+    /**
+     * The ids of media items currently scoped to this platform. Empty means
+     * "no scoping, applies to every post media item", see scopedMediaItems().
+     * Only used for the editor's per-platform media assignment UI, so this
+     * relies on `media` already being eager-loaded (or explicitly appended
+     * via `append('media_ids')`, see PostController::edit()) to avoid a lazy
+     * load nobody asked for on every other page that serializes this model.
+     *
+     * @return array<int, string>
+     */
+    public function getMediaIdsAttribute(): array
+    {
+        return $this->media->pluck('id')->all();
+    }
+
     /**
      * Get display name, falling back to snapshot if account was deleted.
      */

lang/ar/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'اسحب الملفات وأفلتها أو انقر للتصفح',
         'add' => 'إضافة',
         'publish_to' => 'النشر إلى',
+        'media_assignment' => [
+            'label' => 'الوسائط لهذه القناة',
+            'included' => 'مضمّن لهذه القناة',
+            'excluded' => 'مستبعد من هذه القناة',
+        ],
         'organize' => 'تنظيم',
         'signatures' => 'التوقيعات',
         'view_on_platform' => 'العرض على المنصة',

lang/de/posts.php

@@ -346,6 +346,11 @@
         'drop_zone_subtitle' => 'Dateien ziehen & ablegen oder zum Durchsuchen klicken',
         'add' => 'Hinzufügen',
         'publish_to' => 'Veröffentlichen auf',
+        'media_assignment' => [
+            'label' => 'Medien für diesen Kanal',
+            'included' => 'Enthalten für diesen Kanal',
+            'excluded' => 'Ausgeschlossen von diesem Kanal',
+        ],
         'organize' => 'Organisieren',
         'signatures' => 'Signaturen',
         'view_on_platform' => 'Auf der Plattform ansehen',

lang/el/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Σύρετε και αποθέστε αρχεία ή κάντε κλικ για αναζήτηση',
         'add' => 'Προσθήκη',
         'publish_to' => 'Δημοσίευση σε',
+        'media_assignment' => [
+            'label' => 'Πολυμέσα για αυτό το κανάλι',
+            'included' => 'Περιλαμβάνεται σε αυτό το κανάλι',
+            'excluded' => 'Εξαιρείται από αυτό το κανάλι',
+        ],
         'organize' => 'Οργάνωση',
         'signatures' => 'Υπογραφές',
         'view_on_platform' => 'Προβολή στην πλατφόρμα',

lang/en/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Drag & drop files or click to browse',
         'add' => 'Add',
         'publish_to' => 'Publish to',
+        'media_assignment' => [
+            'label' => 'Media for this channel',
+            'included' => 'Included for this channel',
+            'excluded' => 'Excluded from this channel',
+        ],
         'organize' => 'Organize',
         'signatures' => 'Signatures',
         'view_on_platform' => 'View on platform',

lang/es/posts.php

@@ -338,6 +338,11 @@
         'drop_zone_subtitle' => 'Arrastra archivos o haz clic para seleccionar',
         'add' => 'Añadir',
         'publish_to' => 'Publicar en',
+        'media_assignment' => [
+            'label' => 'Contenido para este canal',
+            'included' => 'Incluido en este canal',
+            'excluded' => 'Excluido de este canal',
+        ],
         'organize' => 'Organizar',
         'no_labels' => 'Todavía no hay etiquetas creadas',
         'pick_time' => 'Elegir hora',

lang/fr/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Glissez-déposez des fichiers ou cliquez pour parcourir',
         'add' => 'Ajouter',
         'publish_to' => 'Publier sur',
+        'media_assignment' => [
+            'label' => 'Contenu pour ce canal',
+            'included' => 'Inclus pour ce canal',
+            'excluded' => 'Exclu de ce canal',
+        ],
         'organize' => 'Organiser',
         'signatures' => 'Signatures',
         'view_on_platform' => 'Voir sur la plateforme',

lang/it/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Trascina e rilascia i file oppure clicca per sfogliare',
         'add' => 'Aggiungi',
         'publish_to' => 'Pubblica su',
+        'media_assignment' => [
+            'label' => 'Contenuti per questo canale',
+            'included' => 'Incluso per questo canale',
+            'excluded' => 'Escluso da questo canale',
+        ],
         'organize' => 'Organizza',
         'signatures' => 'Firme',
         'view_on_platform' => 'Visualizza sulla piattaforma',

lang/ja/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'ファイルをドラッグ＆ドロップするか、クリックして参照',
         'add' => '追加',
         'publish_to' => '公開先',
+        'media_assignment' => [
+            'label' => 'このチャンネルのメディア',
+            'included' => 'このチャンネルに含まれています',
+            'excluded' => 'このチャンネルから除外されています',
+        ],
         'organize' => '整理',
         'signatures' => '署名',
         'view_on_platform' => 'プラットフォームで表示',

lang/ko/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => '파일을 끌어다 놓거나 클릭하여 찾아보기',
         'add' => '추가',
         'publish_to' => '게시 대상',
+        'media_assignment' => [
+            'label' => '이 채널의 미디어',
+            'included' => '이 채널에 포함됨',
+            'excluded' => '이 채널에서 제외됨',
+        ],
         'organize' => '정리',
         'signatures' => '서명',
         'view_on_platform' => '플랫폼에서 보기',

lang/nl/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Sleep bestanden hierheen of klik om te bladeren',
         'add' => 'Toevoegen',
         'publish_to' => 'Publiceren naar',
+        'media_assignment' => [
+            'label' => 'Media voor dit kanaal',
+            'included' => 'Inbegrepen voor dit kanaal',
+            'excluded' => 'Uitgesloten van dit kanaal',
+        ],
         'organize' => 'Organiseren',
         'signatures' => 'Handtekeningen',
         'view_on_platform' => 'Bekijken op platform',

lang/pl/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Przeciągnij i upuść pliki lub kliknij, aby przeglądać',
         'add' => 'Dodaj',
         'publish_to' => 'Publikuj na',
+        'media_assignment' => [
+            'label' => 'Media dla tego kanału',
+            'included' => 'Uwzględnione dla tego kanału',
+            'excluded' => 'Wykluczone z tego kanału',
+        ],
         'organize' => 'Organizuj',
         'signatures' => 'Sygnatury',
         'view_on_platform' => 'Zobacz na platformie',

lang/pt-BR/posts.php

@@ -338,6 +338,11 @@
         'drop_zone_subtitle' => 'Arraste arquivos ou clique para selecionar',
         'add' => 'Adicionar',
         'publish_to' => 'Publicar em',
+        'media_assignment' => [
+            'label' => 'Mídia para este canal',
+            'included' => 'Incluído neste canal',
+            'excluded' => 'Excluído deste canal',
+        ],
         'organize' => 'Organizar',
         'no_labels' => 'Nenhuma etiqueta criada ainda',
         'pick_time' => 'Escolher horário',

lang/ru/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Перетащите файлы или нажмите для выбора',
         'add' => 'Добавить',
         'publish_to' => 'Опубликовать в',
+        'media_assignment' => [
+            'label' => 'Медиа для этого канала',
+            'included' => 'Включено для этого канала',
+            'excluded' => 'Исключено из этого канала',
+        ],
         'organize' => 'Организовать',
         'signatures' => 'Подписи',
         'view_on_platform' => 'Открыть на платформе',

lang/tr/posts.php

@@ -346,6 +346,11 @@
         'drop_zone_subtitle' => 'Dosyaları sürükleyip bırakın veya göz atmak için tıklayın',
         'add' => 'Ekle',
         'publish_to' => 'Şuraya yayınla',
+        'media_assignment' => [
+            'label' => 'Bu kanal için medya',
+            'included' => 'Bu kanala dahil',
+            'excluded' => 'Bu kanaldan hariç',
+        ],
         'organize' => 'Düzenle',
         'signatures' => 'İmzalar',
         'view_on_platform' => 'Platformda görüntüle',

lang/uk/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => 'Перетягніть файли або натисніть, щоб обрати',
         'add' => 'Додати',
         'publish_to' => 'Опублікувати в',
+        'media_assignment' => [
+            'label' => 'Медіа для цього каналу',
+            'included' => 'Включено для цього каналу',
+            'excluded' => 'Виключено з цього каналу',
+        ],
         'organize' => 'Організувати',
         'signatures' => 'Підписи',
         'view_on_platform' => 'Переглянути на платформі',

lang/zh/posts.php

@@ -344,6 +344,11 @@
         'drop_zone_subtitle' => '拖放文件或点击浏览',
         'add' => '添加',
         'publish_to' => '发布到',
+        'media_assignment' => [
+            'label' => '此频道的媒体',
+            'included' => '已包含在此频道',
+            'excluded' => '已从此频道排除',
+        ],
         'organize' => '整理',
         'signatures' => '签名',
         'view_on_platform' => '在平台上查看',

resources/js/components/ChannelConfigurator.vue

@@ -6,6 +6,7 @@ import DiscordSettings from '@/components/posts/editor/DiscordSettings.vue';
 import FacebookSettings from '@/components/posts/editor/FacebookSettings.vue';
 import InstagramSettings from '@/components/posts/editor/InstagramSettings.vue';
 import LinkedInSettings from '@/components/posts/editor/LinkedInSettings.vue';
+import MediaAssignmentGrid from '@/components/posts/editor/MediaAssignmentGrid.vue';
 import PinterestSettings from '@/components/posts/editor/PinterestSettings.vue';
 import TikTokSettings from '@/components/posts/editor/TikTokSettings.vue';
 import { Avatar } from '@/components/ui/avatar';
@@ -33,6 +34,7 @@ const emit = defineEmits<{
     toggle: [id: string];
     'update:contentType': [id: string, value: string];
     'update:meta': [id: string, value: Record<string, any>];
+    'update:mediaIds': [id: string, mediaIds: string[]];
 }>();
 
 const isSelected = (id: string): boolean => props.selectedIds.includes(id);
@@ -121,6 +123,13 @@ const settingsProps = (channel: Channel) => ({
         <slot />
 
         <template v-for="channel in selectedChannels" :key="channel.id">
+            <MediaAssignmentGrid
+                :platform="channel.platform"
+                :media="media"
+                :selected-media-ids="channel.mediaIds"
+                :disabled="disabled"
+                @update:selected-media-ids="(ids) => emit('update:mediaIds', channel.id, ids)"
+            />
             <InstagramSettings
                 v-if="channel.platform === Platform.Instagram || channel.platform === Platform.InstagramFacebook"
                 v-bind="settingsProps(channel)"