feat: multi-link files to multiple bookings and places — closes #23

Files can now be linked to multiple bookings and places simultaneously
via a new file_links junction table. Booking modal includes a file picker
to link existing uploads. Unlinking removes the association without
deleting the file.

client/src/i18n/translations/ar.ts

@@ -750,6 +750,7 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'reservations.pendingSave': 'سيتم الحفظ…',
   'reservations.uploading': 'جارٍ الرفع...',
   'reservations.attachFile': 'إرفاق ملف',
+  'reservations.linkExisting': 'ربط ملف موجود',
   'reservations.toast.saveError': 'فشل الحفظ',
   'reservations.toast.updateError': 'فشل التحديث',
   'reservations.toast.deleteError': 'فشل الحذف',

client/src/i18n/translations/de.ts

@@ -758,6 +758,7 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'reservations.pendingSave': 'wird gespeichert…',
   'reservations.uploading': 'Wird hochgeladen...',
   'reservations.attachFile': 'Datei anhängen',
+  'reservations.linkExisting': 'Vorhandene verknüpfen',
   'reservations.linkAssignment': 'Mit Tagesplanung verknüpfen',
   'reservations.pickAssignment': 'Zuordnung aus dem Plan wählen...',
   'reservations.noAssignment': 'Keine Verknüpfung',

client/src/i18n/translations/en.ts

@@ -754,6 +754,7 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'reservations.pendingSave': 'will be saved…',
   'reservations.uploading': 'Uploading...',
   'reservations.attachFile': 'Attach file',
+  'reservations.linkExisting': 'Link existing file',
   'reservations.toast.saveError': 'Failed to save',
   'reservations.toast.updateError': 'Failed to update',
   'reservations.toast.deleteError': 'Failed to delete',

client/src/i18n/translations/es.ts

@@ -706,6 +706,7 @@ const es: Record<string, string> = {
   'reservations.pendingSave': 'se guardará…',
   'reservations.uploading': 'Subiendo...',
   'reservations.attachFile': 'Adjuntar archivo',
+  'reservations.linkExisting': 'Vincular archivo existente',
   'reservations.toast.saveError': 'No se pudo guardar',
   'reservations.toast.updateError': 'No se pudo actualizar',
   'reservations.toast.deleteError': 'No se pudo eliminar',

client/src/i18n/translations/fr.ts

@@ -743,6 +743,7 @@ const fr: Record<string, string> = {
   'reservations.pendingSave': 'sera enregistré…',
   'reservations.uploading': 'Téléversement...',
   'reservations.attachFile': 'Joindre un fichier',
+  'reservations.linkExisting': 'Lier un fichier existant',
   'reservations.toast.saveError': 'Échec de l\'enregistrement',
   'reservations.toast.updateError': 'Échec de la mise à jour',
   'reservations.toast.deleteError': 'Échec de la suppression',

client/src/i18n/translations/nl.ts

@@ -743,6 +743,7 @@ const nl: Record<string, string> = {
   'reservations.pendingSave': 'wordt opgeslagen…',
   'reservations.uploading': 'Uploaden...',
   'reservations.attachFile': 'Bestand bijvoegen',
+  'reservations.linkExisting': 'Bestaand bestand koppelen',
   'reservations.toast.saveError': 'Opslaan mislukt',
   'reservations.toast.updateError': 'Bijwerken mislukt',
   'reservations.toast.deleteError': 'Verwijderen mislukt',

client/src/i18n/translations/ru.ts

@@ -743,6 +743,7 @@ const ru: Record<string, string> = {
   'reservations.pendingSave': 'будет сохранено…',
   'reservations.uploading': 'Загрузка...',
   'reservations.attachFile': 'Прикрепить файл',
+  'reservations.linkExisting': 'Привязать существующий файл',
   'reservations.toast.saveError': 'Ошибка сохранения',
   'reservations.toast.updateError': 'Ошибка обновления',
   'reservations.toast.deleteError': 'Ошибка удаления',

client/src/i18n/translations/zh.ts

@@ -743,6 +743,7 @@ const zh: Record<string, string> = {
   'reservations.pendingSave': '将被保存…',
   'reservations.uploading': '上传中...',
   'reservations.attachFile': '附加文件',
+  'reservations.linkExisting': '关联已有文件',
   'reservations.toast.saveError': '保存失败',
   'reservations.toast.updateError': '更新失败',
   'reservations.toast.deleteError': '删除失败',