diff --git a/loko/common/models.py b/loko/common/models.py
index 75f2078..572d77b 100644
--- a/loko/common/models.py
+++ b/loko/common/models.py
@@ -411,7 +411,7 @@ class UserConfig(models.Model):
 
     def can_manage_preparation_orders_any(self):
         """Vérifie si l'utilisateur peut gérer des bons de préparation sur au moins un entrepôt."""
-        if self.user.is_superuser or self.has_role('admin'):
+        if self.user.is_superuser or self.has_role('admin') or self.has_role('stock_manager'):
             return True
         if not self.userwarehouses.exists():
             if self.userlocations.exists():
@@ -421,7 +421,7 @@ class UserConfig(models.Model):
 
     def can_manage_preparation_orders_for(self, warehouse):
         """Vérifie si l'utilisateur peut gérer des bons de préparation pour un entrepôt spécifique."""
-        if self.user.is_superuser or self.has_role('admin'):
+        if self.user.is_superuser or self.has_role('admin') or self.has_role('stock_manager'):
             return True
         if not self.userwarehouses.exists():
             if self.userlocations.exists():
diff --git a/loko/mobile/views.py b/loko/mobile/views.py
index 7f0f5ab..e1a0360 100644
--- a/loko/mobile/views.py
+++ b/loko/mobile/views.py
@@ -988,11 +988,17 @@ def stock_preparation_order_detail_mobile(request, pk):
     if request.method == 'POST' and request.FILES.getlist('documents'):
         from stock.models import PreparationOrderDocument
         for f in request.FILES.getlist('documents'):
-            PreparationOrderDocument.objects.create(
+            doc = PreparationOrderDocument.objects.create(
                 preparation_order=preparation_order,
                 file=f,
                 name=f.name,
             )
+            preparation_order.log_history(
+                action="document_added",
+                description=_("Ajout du document joint : {name}").format(name=doc.name or doc.filename()),
+                user=request.user,
+                details={'document_id': doc.pk, 'filename': doc.filename()},
+            )
         messages.success(request, _('Document(s) ajouté(s) avec succès.'))
         return redirect('mobile:stock_preparation_order_detail_mobile', pk=pk)
 
@@ -1056,10 +1062,12 @@ def stock_preparation_order_detail_mobile(request, pk):
                 'location_info': ", ".join(loc_names),
             })
 
+    from stock.permissions import user_can_manage_preparation_orders, user_can_edit_preparation_order
     try:
         user_config = request.user.config
-        can_manage = user_config.has_role('stock_manager') or user_config.has_role('admin') or user_config.can_manage_preparation_orders_any()
-        can_cancel = user_config.can_manage_preparation_orders_any()
+        can_manage = user_can_manage_preparation_orders(request.user)
+        can_edit = user_can_edit_preparation_order(request.user, preparation_order)
+        can_cancel = can_manage and preparation_order.status != 'cancelled'
         can_manage_purchase = user_config.can_manage_purchase_orders_any()
         can_manage_stock = (
             request.user.is_superuser
@@ -1069,10 +1077,14 @@ def stock_preparation_order_detail_mobile(request, pk):
         )
     except UserConfig.DoesNotExist:
         can_manage = False
+        can_edit = False
         can_cancel = False
         can_manage_purchase = False
         can_manage_stock = False
 
+    history_entries = preparation_order.history_entries.select_related('user').order_by('-created_at')
+    has_pending_stock_adjustments = any(it['delta'] != 0 for it in items_with_stock) or bool(deleted_items_to_return)
+
     other_items_with_info = []
     for oi in preparation_order.other_items.all():
         other_items_with_info.append({
@@ -1109,6 +1121,7 @@ def stock_preparation_order_detail_mobile(request, pk):
         'items_with_stock': items_with_stock,
         'other_items': other_items_with_info,
         'can_manage': can_manage,
+        'can_edit': can_edit,
         'can_cancel': can_cancel,
         'can_manage_purchase': can_manage_purchase,
         'can_manage_stock': can_manage_stock,
@@ -1117,6 +1130,8 @@ def stock_preparation_order_detail_mobile(request, pk):
         'has_executed_outputs': has_executed_outputs,
         'is_reopened': is_reopened,
         'deleted_items_to_return': deleted_items_to_return,
+        'history_entries': history_entries,
+        'has_pending_stock_adjustments': has_pending_stock_adjustments,
         'discussion': _discussion,
         'discussion_messages': discussion_messages_mobile,
         'can_post_discussion_message': can_post_discussion_message_mobile,
diff --git a/loko/stock/admin.py b/loko/stock/admin.py
index d4b9d0b..f97f6e9 100644
--- a/loko/stock/admin.py
+++ b/loko/stock/admin.py
@@ -4,7 +4,7 @@ from django.utils.html import format_html
 from .models import (
     Product, ProductCategory, Warehouse, WarehouseLocation, Stock, StockMovement,
     PurchaseOrder, PurchaseOrderItem, PreparationOrder, PreparationOrderItem,
-    PreparationOrderOtherItem,
+    PreparationOrderOtherItem, PreparationOrderHistory,
     ProductionOrder,
     SerializedItem, SerializedItemEvent,
 )
@@ -91,12 +91,23 @@ class PreparationOrderOtherItemInline(admin.TabularInline):
     extra = 1
 
 
+class PreparationOrderHistoryInline(admin.TabularInline):
+    model = PreparationOrderHistory
+    extra = 0
+    readonly_fields = ('created_at', 'author_short_name', 'action', 'description', 'details')
+    can_delete = False
+
+    def author_short_name(self, obj):
+        return obj.author_short_name
+    author_short_name.short_description = 'Auteur'
+
+
 @admin.register(PreparationOrder)
 class PreparationOrderAdmin(admin.ModelAdmin):
     list_display = ('order_number', 'date', 'status', 'priority')
     search_fields = ('order_number',)
     list_filter = ('status', 'date', 'priority')
-    inlines = [PreparationOrderItemInline, PreparationOrderOtherItemInline]
+    inlines = [PreparationOrderItemInline, PreparationOrderOtherItemInline, PreparationOrderHistoryInline]
 
     def get_readonly_fields(self, request, obj=None):
         if obj:  # editing an existing object
@@ -104,6 +115,14 @@ class PreparationOrderAdmin(admin.ModelAdmin):
         return self.readonly_fields
 
 
+@admin.register(PreparationOrderHistory)
+class PreparationOrderHistoryAdmin(admin.ModelAdmin):
+    list_display = ('preparation_order', 'created_at', 'author_short_name', 'action', 'description')
+    list_filter = ('action', 'created_at')
+    search_fields = ('preparation_order__order_number', 'user_short_name', 'description')
+    readonly_fields = ('preparation_order', 'user', 'user_short_name', 'created_at', 'action', 'description', 'details')
+
+
 @admin.register(PreparationOrderItem)
 class PreparationOrderItemAdmin(admin.ModelAdmin):
     list_display = ('preparation_order', 'product', 'quantity', 'is_prepared', 'is_used')
diff --git a/loko/stock/migrations/0003_preparationorderhistory.py b/loko/stock/migrations/0003_preparationorderhistory.py
new file mode 100644
index 0000000..dc1e655
--- /dev/null
+++ b/loko/stock/migrations/0003_preparationorderhistory.py
@@ -0,0 +1,34 @@
+# Generated by Django 6.0.7 on 2026-09-29 11:03
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0002_preparationorderitem_is_used_and_more'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PreparationOrderHistory',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('user_short_name', models.CharField(blank=True, max_length=150, verbose_name='Nom court')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Date et heure')),
+                ('action', models.CharField(choices=[('created', 'Création'), ('item_added', 'Ajout de produit'), ('quantity_changed', 'Modification de quantité'), ('item_removed', 'Suppression de produit'), ('other_item_added', "Ajout d'article personnalisé"), ('other_item_updated', "Modification d'article personnalisé"), ('other_item_removed', "Suppression d'article personnalisé"), ('status_changed', 'Changement de statut'), ('reopened', 'Réouverture'), ('processed', 'Traitement'), ('cancelled', 'Annulation'), ('loan_updated', 'Modification du prêt'), ('document_added', 'Ajout de document'), ('document_removed', 'Suppression de document'), ('other', 'Autre modification')], default='other', max_length=50, verbose_name='Action')),
+                ('description', models.TextField(verbose_name='Description')),
+                ('details', models.JSONField(blank=True, default=dict, verbose_name='Détails')),
+                ('preparation_order', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='history_entries', to='stock.preparationorder', verbose_name='Bon de préparation')),
+                ('user', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='preparation_order_history_entries', to=settings.AUTH_USER_MODEL, verbose_name='Utilisateur')),
+            ],
+            options={
+                'verbose_name': 'Historique de bon de préparation',
+                'verbose_name_plural': 'Historiques de bons de préparation',
+                'ordering': ['-created_at'],
+            },
+        ),
+    ]
diff --git a/loko/stock/models.py b/loko/stock/models.py
index 5b95a06..97b99a8 100644
--- a/loko/stock/models.py
+++ b/loko/stock/models.py
@@ -1,4 +1,5 @@
 from django.contrib.gis.db import models
+from django.conf import settings
 from django.db import transaction
 from django.db.models import Sum, F
 from django.utils import timezone
@@ -1673,6 +1674,21 @@ class PreparationOrder(models.Model):
     def total_items_count(self):
         return self.preparationorderitem_set.count() + self.other_items.count()
 
+    def log_history(self, action, description, user=None, details=None):
+        """Enregistre un événement dans l'historique du bon de préparation."""
+        from common.utils import get_short_name
+        user_short = ""
+        if user and getattr(user, "is_authenticated", False):
+            user_short = get_short_name(user)
+        return self.history_entries.create(
+            user=user if (user and getattr(user, "is_authenticated", False)) else None,
+            user_short_name=user_short,
+            action=action,
+            description=description,
+            details=details or {},
+        )
+
+
 
 
 class PreparationOrderItem(models.Model):
@@ -1866,6 +1882,134 @@ class PreparationOrderOtherItem(models.Model):
         )
 
 
+class PreparationOrderHistory(models.Model):
+    """
+    Historique des modifications apportées à un bon de préparation.
+    Trace les ajouts, modifications de quantité, suppressions et changements de statut avec utilisateur (shortname) et date.
+    """
+    ACTION_CHOICES = [
+        ("created", _("Création")),
+        ("item_added", _("Ajout de produit")),
+        ("quantity_changed", _("Modification de quantité")),
+        ("item_removed", _("Suppression de produit")),
+        ("other_item_added", _("Ajout d'article personnalisé")),
+        ("other_item_updated", _("Modification d'article personnalisé")),
+        ("other_item_removed", _("Suppression d'article personnalisé")),
+        ("status_changed", _("Changement de statut")),
+        ("reopened", _("Réouverture")),
+        ("processed", _("Traitement")),
+        ("cancelled", _("Annulation")),
+        ("loan_updated", _("Modification du prêt")),
+        ("document_added", _("Ajout de document")),
+        ("document_removed", _("Suppression de document")),
+        ("other", _("Autre modification")),
+    ]
+
+    preparation_order = models.ForeignKey(
+        PreparationOrder,
+        on_delete=models.CASCADE,
+        related_name="history_entries",
+        verbose_name=_("Bon de préparation"),
+    )
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="preparation_order_history_entries",
+        verbose_name=_("Utilisateur"),
+    )
+    user_short_name = models.CharField(
+        max_length=150,
+        blank=True,
+        verbose_name=_("Nom court"),
+    )
+    created_at = models.DateTimeField(
+        auto_now_add=True,
+        verbose_name=_("Date et heure"),
+    )
+    action = models.CharField(
+        max_length=50,
+        choices=ACTION_CHOICES,
+        default="other",
+        verbose_name=_("Action"),
+    )
+    description = models.TextField(
+        verbose_name=_("Description"),
+    )
+    details = models.JSONField(
+        default=dict,
+        blank=True,
+        verbose_name=_("Détails"),
+    )
+
+    class Meta:
+        verbose_name = _("Historique de bon de préparation")
+        verbose_name_plural = _("Historiques de bons de préparation")
+        ordering = ["-created_at"]
+
+    def __str__(self):
+        return f"[{self.created_at.strftime('%d/%m/%Y %H:%M')}] {self.author_short_name}: {self.description}"
+
+    def save(self, *args, **kwargs):
+        if not self.user_short_name and self.user:
+            from common.utils import get_short_name
+            self.user_short_name = get_short_name(self.user)
+        super().save(*args, **kwargs)
+
+    @property
+    def author_short_name(self):
+        if self.user:
+            from common.utils import get_short_name
+            name = get_short_name(self.user)
+            if name:
+                return name
+        return self.user_short_name or _("Système")
+
+    @property
+    def badge_class(self):
+        badges = {
+            "created": "bg-primary",
+            "item_added": "bg-success",
+            "quantity_changed": "bg-warning text-dark",
+            "item_removed": "bg-danger",
+            "other_item_added": "bg-info text-dark",
+            "other_item_updated": "bg-warning text-dark",
+            "other_item_removed": "bg-danger",
+            "status_changed": "bg-info text-dark",
+            "reopened": "bg-warning text-dark",
+            "processed": "bg-success",
+            "cancelled": "bg-secondary",
+            "loan_updated": "bg-primary",
+            "document_added": "bg-secondary",
+            "document_removed": "bg-secondary",
+        }
+        return badges.get(self.action, "bg-secondary")
+
+    @property
+    def icon_class(self):
+        icons = {
+            "created": "bi-plus-circle-fill",
+            "item_added": "bi-box-seam-fill",
+            "quantity_changed": "bi-pencil-fill",
+            "item_removed": "bi-trash-fill",
+            "other_item_added": "bi-tag-fill",
+            "other_item_updated": "bi-pencil-square",
+            "other_item_removed": "bi-trash-fill",
+            "status_changed": "bi-arrow-repeat",
+            "reopened": "bi-arrow-counterclockwise",
+            "processed": "bi-check2-circle",
+            "cancelled": "bi-x-circle-fill",
+            "loan_updated": "bi-calendar-event-fill",
+            "document_added": "bi-paperclip",
+            "document_removed": "bi-trash",
+        }
+        return icons.get(self.action, "bi-clock-history")
+
+
+
+
+
 # class ProductDesign(models.Model):
 #     """
 #     Conception de produit : une fiche/recette décrivant comment assembler
diff --git a/loko/stock/permissions.py b/loko/stock/permissions.py
index db2a5bf..a260c2f 100644
--- a/loko/stock/permissions.py
+++ b/loko/stock/permissions.py
@@ -303,3 +303,36 @@ def user_can_manage_products(user):
         config.has_role('admin')
         or config.can_administer_any_warehouse()
     )
+
+
+def user_can_manage_preparation_orders(user, warehouse=None):
+    """
+    Vérifie si l'utilisateur peut gérer des bons de préparation (création, traitement, annulation).
+    Autorisé pour les superutilisateurs, le rôle admin, le rôle stock_manager (magasinier),
+    ou les utilisateurs ayant la permission can_manage_preparation_orders.
+    """
+    if not user.is_authenticated:
+        return False
+    if user.is_superuser:
+        return True
+    config = get_user_config(user)
+    if not config:
+        return False
+    if config.has_role('admin') or config.has_role('stock_manager'):
+        return True
+    if warehouse:
+        return config.can_manage_preparation_orders_for(warehouse)
+    return config.can_manage_preparation_orders_any()
+
+
+def user_can_edit_preparation_order(user, preparation_order=None):
+    """
+    Vérifie si l'utilisateur peut modifier un bon de préparation.
+    La modification est possible pour les gestionnaires et magasiniers,
+    même lorsque le bon est au statut 'traité' (processed).
+    Seul le statut 'annulé' (cancelled) est non modifiable.
+    """
+    if preparation_order and preparation_order.status == 'cancelled':
+        return False
+    return user_can_manage_preparation_orders(user)
+
diff --git a/loko/stock/templates/stock/mobile/stock_preparation_order_detail_mobile.html b/loko/stock/templates/stock/mobile/stock_preparation_order_detail_mobile.html
index 32ea3ca..3856451 100644
--- a/loko/stock/templates/stock/mobile/stock_preparation_order_detail_mobile.html
+++ b/loko/stock/templates/stock/mobile/stock_preparation_order_detail_mobile.html
@@ -116,6 +116,21 @@
 </div>
 {% endif %}
 
+{% if preparation_order.status == 'processed' and has_pending_stock_adjustments %}
+<div class="alert alert-warning border-warning shadow-sm mb-3" role="alert">
+    <div class="d-flex align-items-center mb-1">
+        <i class="bi bi-exclamation-triangle-fill text-warning me-2 fs-4"></i>
+        <h6 class="alert-heading mb-0 fw-bold">{% translate "Ajustements de stock en attente !" %}</h6>
+    </div>
+    <p class="mb-2 small" style="font-size:0.82rem;">{% translate "Ce bon a été modifié après son traitement. Une régularisation du stock est nécessaire." %}</p>
+    {% if can_manage %}
+    <a href="{% url 'stock:preparation_order_process' preparation_order.pk %}" class="btn btn-warning btn-sm w-100">
+        <i class="bi bi-check-circle me-1"></i> {% translate "Régulariser les stocks maintenant" %}
+    </a>
+    {% endif %}
+</div>
+{% endif %}
+
 <!-- Intervention liée -->
 {% if preparation_order.intervention %}
 <div class="info-card">
@@ -465,6 +480,11 @@
         <button type="button" class="btn btn-success" data-bs-toggle="modal" data-bs-target="#confirmProcessModalMobile">
             <i class="bi bi-check2-circle me-1"></i>{% translate "Signaler comme traité" %}
         </button>
+        {% if can_edit %}
+        <a href="{% url 'stock:preparation_order_detail' preparation_order.pk %}?open_edit=1" class="btn btn-outline-warning">
+            <i class="bi bi-pencil-square me-1"></i>{% translate "Modifier les articles" %}
+        </a>
+        {% endif %}
         {% if can_manage_purchase %}
         <a href="{% url 'stock:preparation_order_create_purchase' preparation_order.pk %}" class="btn btn-primary">
             <i class="bi bi-cart-plus me-1"></i>{% translate "Créer un bon de commande" %}
@@ -480,6 +500,16 @@
         </button>
         {% endif %}
     {% elif preparation_order.status == 'processed' %}
+        {% if can_edit %}
+        <a href="{% url 'stock:preparation_order_detail' preparation_order.pk %}?open_edit=1" class="btn btn-outline-primary">
+            <i class="bi bi-pencil-square me-1"></i>{% translate "Modifier le bon" %}
+        </a>
+        {% endif %}
+        {% if has_pending_stock_adjustments %}
+        <a href="{% url 'stock:preparation_order_process' preparation_order.pk %}" class="btn btn-warning">
+            <i class="bi bi-arrow-repeat me-1"></i>{% translate "Régulariser les stocks" %}
+        </a>
+        {% endif %}
         {% if can_manage_stock %}
         <a href="{% url 'mobile:new_stock_entry_mobile' %}?preparation_order={{ preparation_order.pk }}" class="btn btn-info text-white">
             <i class="bi bi-arrow-return-left me-1"></i>{% translate "Créer un retour de stock" %}
@@ -564,6 +594,38 @@
     </form>
 </div>
 
+<!-- Historique des modifications -->
+<div class="section-title mt-3">
+    <i class="bi bi-clock-history me-1"></i>{% translate "Historique des modifications" %}
+    <span class="badge bg-secondary ms-1">{{ history_entries|length }}</span>
+</div>
+<div class="info-card">
+    {% if history_entries %}
+        {% for entry in history_entries %}
+        <div class="py-2 border-bottom {% if forloop.last %}border-bottom-0{% endif %}">
+            <div class="d-flex justify-content-between align-items-center mb-1">
+                <span class="badge {{ entry.badge_class }}" style="font-size:0.75rem;">
+                    <i class="bi {{ entry.icon_class }} me-1"></i>{{ entry.get_action_display }}
+                </span>
+                <small class="text-muted" style="font-size:0.75rem;">
+                    {{ entry.created_at|date:"d/m/Y H:i" }}
+                </small>
+            </div>
+            <div class="d-flex justify-content-between align-items-baseline">
+                <span class="small fw-semibold text-secondary">
+                    <i class="bi bi-person me-1"></i>{{ entry.author_short_name }}
+                </span>
+            </div>
+            <div class="small text-dark mt-1" style="font-size:0.83rem;">
+                {{ entry.description }}
+            </div>
+        </div>
+        {% endfor %}
+    {% else %}
+        <p class="text-muted fst-italic mb-0 small text-center py-2">{% translate "Aucun historique disponible." %}</p>
+    {% endif %}
+</div>
+
 <script>
 (function() {
     const dropZone  = document.getElementById('mob-drop-zone');
diff --git a/loko/stock/templates/stock/preparation_order_detail.html b/loko/stock/templates/stock/preparation_order_detail.html
index db4d42a..652db54 100644
--- a/loko/stock/templates/stock/preparation_order_detail.html
+++ b/loko/stock/templates/stock/preparation_order_detail.html
@@ -98,6 +98,23 @@
             </div>
             {% endif %}
 
+            {% if preparation_order.status == 'processed' and has_pending_stock_adjustments %}
+            <div class="alert alert-warning border-warning shadow-sm mb-3" role="alert">
+                <div class="d-flex align-items-center">
+                    <i class="bi bi-exclamation-triangle-fill text-warning me-3 fs-1"></i>
+                    <div class="flex-grow-1">
+                        <h5 class="alert-heading mb-1 fw-bold">{% translate "Ajustements de stock en attente !" %}</h5>
+                        <p class="mb-2">{% translate "Ce bon de préparation a été modifié après son traitement initial. Les quantités demandées ont changé et nécessitent une régularisation du stock (sortie de stock additionnelle ou réintégration)." %}</p>
+                        {% if can_manage %}
+                        <a href="{% url 'stock:preparation_order_process' preparation_order.pk %}" class="btn btn-warning btn-sm">
+                            <i class="bi bi-check-circle me-1"></i> {% translate "Régulariser les stocks maintenant" %}
+                        </a>
+                        {% endif %}
+                    </div>
+                </div>
+            </div>
+            {% endif %}
+
             <!-- Intervention liée -->
             {% if preparation_order.intervention %}
             <div class="card mb-3 shadow-sm">
@@ -267,9 +284,16 @@
                     <h5 class="mb-0">
                         <i class="bi bi-box-seam"></i> {% translate "Produits demandés" %}
                     </h5>
-                    <span class="badge bg-secondary">
-                        {{ items_with_stock|length }} {% translate "article(s)" %}
-                    </span>
+                    <div class="d-flex align-items-center gap-2">
+                        <span class="badge bg-secondary">
+                            {{ items_with_stock|length }} {% translate "article(s)" %}
+                        </span>
+                        {% if can_edit %}
+                        <button type="button" class="btn btn-sm btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editPreparationOrderModal">
+                            <i class="bi bi-pencil me-1"></i> {% translate "Modifier les articles" %}
+                        </button>
+                        {% endif %}
+                    </div>
                 </div>
                 <div class="card-body">
                     <div class="table-responsive">
@@ -323,7 +347,17 @@
                                     {% if has_executed_outputs %}
                                     <td class="text-center">
                                         {% if preparation_order.status == 'processed' %}
-                                            {% if item_data.gross_in > 0 and item_data.executed_qty == 0 %}
+                                            {% if item_data.delta > 0 %}
+                                                <span class="badge bg-warning text-dark fs-6" title="{% translate 'Complément à prélever' %}">
+                                                    <i class="bi bi-plus-circle me-1"></i>+{{ item_data.delta }} {% translate "à prélever" %}
+                                                </span>
+                                                <br><small class="text-muted">{% translate "Sorti net" %}: {{ item_data.executed_qty }}</small>
+                                            {% elif item_data.delta < 0 %}
+                                                <span class="badge bg-info text-dark fs-6" title="{% translate 'Surplus à restituer en stock' %}">
+                                                    <i class="bi bi-arrow-return-left me-1"></i>{{ item_data.delta }} {% translate "à restituer" %}
+                                                </span>
+                                                <br><small class="text-muted">{% translate "Sorti net" %}: {{ item_data.executed_qty }}</small>
+                                            {% elif item_data.gross_in > 0 and item_data.executed_qty == 0 %}
                                                 <span class="badge bg-info text-dark fs-6" title="{% translate 'Tous les articles ont été restitués au stock' %}">
                                                     <i class="bi bi-arrow-return-left me-1"></i>{% translate "Restitué au stock" %} ({{ item_data.gross_in }})
                                                 </span>
@@ -597,6 +631,60 @@
                     </div>
             {% endcomment %}
 
+            <!-- Historique des modifications -->
+            <div class="card mb-3 shadow-sm">
+                <div class="card-header d-flex justify-content-between align-items-center">
+                    <h5 class="mb-0">
+                        <i class="bi bi-clock-history me-1"></i> {% translate "Historique des modifications" %}
+                    </h5>
+                    <span class="badge bg-secondary">
+                        {{ history_entries|length }} {% translate "événement(s)" %}
+                    </span>
+                </div>
+                <div class="card-body p-0">
+                    {% if history_entries %}
+                    <div class="table-responsive">
+                        <table class="table table-hover table-striped align-middle mb-0">
+                            <thead class="table-light">
+                                <tr>
+                                    <th style="width: 170px;">{% translate "Date / Heure" %}</th>
+                                    <th style="width: 160px;">{% translate "Utilisateur" %}</th>
+                                    <th style="width: 160px;">{% translate "Action" %}</th>
+                                    <th>{% translate "Détails" %}</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for entry in history_entries %}
+                                <tr>
+                                    <td class="text-nowrap small text-muted">
+                                        <i class="bi bi-calendar3 me-1"></i>{{ entry.created_at|date:"d/m/Y H:i:s" }}
+                                    </td>
+                                    <td>
+                                        <span class="fw-semibold">
+                                            <i class="bi bi-person me-1 text-secondary"></i>{{ entry.author_short_name }}
+                                        </span>
+                                    </td>
+                                    <td>
+                                        <span class="badge {{ entry.badge_class }}">
+                                            <i class="bi {{ entry.icon_class }} me-1"></i>{{ entry.get_action_display }}
+                                        </span>
+                                    </td>
+                                    <td>
+                                        {{ entry.description }}
+                                    </td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                    {% else %}
+                    <div class="p-3 text-muted text-center">
+                        <i class="bi bi-info-circle me-1"></i>{% translate "Aucun historique disponible pour ce bon." %}
+                    </div>
+                    {% endif %}
+                </div>
+            </div>
+
             <!-- Actions -->
             {% if can_manage %}
             <div class="card shadow-sm">
@@ -640,7 +728,7 @@
                             </div>
                         </div>
                         
-                        {% if can_cancel %}
+                        {% if can_edit %}
                         <div class="col-md-3 mb-3">
                             <div class="card h-100 border-warning">
                                 <div class="card-body text-center">
@@ -653,7 +741,9 @@
                                 </div>
                             </div>
                         </div>
+                        {% endif %}
 
+                        {% if can_cancel %}
                         <div class="col-md-3 mb-3">
                             <div class="card h-100 border-danger">
                                 <div class="card-body text-center">
@@ -672,6 +762,36 @@
                         </div>
                         {% endif %}
                         {% elif preparation_order.status == 'processed' %}
+                        {% if can_edit %}
+                        <div class="col-md-4 mb-3">
+                            <div class="card h-100 border-primary">
+                                <div class="card-body text-center">
+                                    <i class="bi bi-pencil-square text-primary" style="font-size: 2rem;"></i>
+                                    <h6 class="mt-2">{% translate "Modifier le bon de préparation" %}</h6>
+                                    <p class="text-muted small">{% translate "Modifier les quantités ou les articles du bon sans changer son statut" %}</p>
+                                    <button type="button" class="btn btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editPreparationOrderModal">
+                                        <i class="bi bi-pencil me-1"></i> {% translate "Modifier le bon" %}
+                                    </button>
+                                </div>
+                            </div>
+                        </div>
+                        {% endif %}
+
+                        {% if has_pending_stock_adjustments and can_manage %}
+                        <div class="col-md-4 mb-3">
+                            <div class="card h-100 border-warning bg-light">
+                                <div class="card-body text-center">
+                                    <i class="bi bi-arrow-repeat text-warning" style="font-size: 2rem;"></i>
+                                    <h6 class="mt-2">{% translate "Régulariser les stocks" %}</h6>
+                                    <p class="text-muted small">{% translate "Des ajustements de stock sont nécessaires suite aux modifications apportées" %}</p>
+                                    <a href="{% url 'stock:preparation_order_process' preparation_order.pk %}" class="btn btn-warning">
+                                        <i class="bi bi-check-circle me-1"></i> {% translate "Régulariser maintenant" %}
+                                    </a>
+                                </div>
+                            </div>
+                        </div>
+                        {% endif %}
+
                         {% if can_manage_stock %}
                         <div class="col-md-4 mb-3">
                             <div class="card h-100 border-info">
@@ -738,7 +858,7 @@
     </div>
 </div>
 
-{% if can_cancel %}
+{% if can_edit %}
 <!-- Modale de modification du bon de préparation -->
 <div class="modal fade" id="editPreparationOrderModal" tabindex="-1" aria-labelledby="editPreparationOrderModalLabel" aria-hidden="true">
     <div class="modal-dialog modal-xl" style="height:90vh;max-height:90vh;">
diff --git a/loko/stock/views.py b/loko/stock/views.py
index 9282153..355969d 100644
--- a/loko/stock/views.py
+++ b/loko/stock/views.py
@@ -3519,6 +3519,13 @@ def new_preparation_order(request):
                     name=f.name,
                 )
 
+            preparation_order.log_history(
+                action="created",
+                description=_("Création du bon de préparation"),
+                user=request.user,
+                details={'order_number': preparation_order.order_number},
+            )
+
             messages.success(request, _("Commande de préparation enregistrée."))
             return redirect("stock:stock_movements")
     else:
@@ -3662,6 +3669,15 @@ def new_preparation_order_from_intervention(request, intervention_id):
                     name=f.name,
                 )
 
+            preparation_order.log_history(
+                action="created",
+                description=_("Création du bon de préparation depuis l'intervention #{intervention_id}").format(
+                    intervention_id=intervention.id
+                ),
+                user=request.user,
+                details={'order_number': preparation_order.order_number, 'intervention_id': intervention.id},
+            )
+
             messages.success(request, _("Bon de préparation créé avec succès."))
             return redirect(redirect_target, intervention_id=intervention_id)
     else:
@@ -3869,11 +3885,17 @@ def preparation_order_detail(request, pk):
     # Ajout de documents via POST
     if request.method == 'POST' and request.FILES.getlist('documents'):
         for f in request.FILES.getlist('documents'):
-            PreparationOrderDocument.objects.create(
+            doc = PreparationOrderDocument.objects.create(
                 preparation_order=preparation_order,
                 file=f,
                 name=f.name,
             )
+            preparation_order.log_history(
+                action="document_added",
+                description=_("Ajout du document joint : {name}").format(name=doc.name or doc.filename()),
+                user=request.user,
+                details={'document_id': doc.pk, 'filename': doc.filename()},
+            )
         messages.success(request, _("Document(s) ajouté(s) avec succès."))
         return redirect('stock:preparation_order_detail', pk=pk)
     
@@ -3942,11 +3964,13 @@ def preparation_order_detail(request, pk):
             })
 
     # Vérifier les permissions
+    from stock.permissions import user_can_manage_preparation_orders, user_can_edit_preparation_order
     from common.models import UserConfig
     try:
         user_config = request.user.config
-        can_manage = request.user.is_superuser or user_config.has_role('admin') or user_config.can_manage_preparation_orders_any()
-        can_cancel = user_config.can_manage_preparation_orders_any()
+        can_manage = user_can_manage_preparation_orders(request.user)
+        can_edit = user_can_edit_preparation_order(request.user, preparation_order)
+        can_cancel = can_manage and preparation_order.status != 'cancelled'
         can_manage_purchase = user_config.can_manage_purchase_orders_any()
         can_manage_stock = (
             request.user.is_superuser
@@ -3956,10 +3980,14 @@ def preparation_order_detail(request, pk):
         )
     except UserConfig.DoesNotExist:
         can_manage = False
+        can_edit = False
         can_cancel = False
         can_manage_purchase = False
         can_manage_stock = False
 
+    history_entries = preparation_order.history_entries.select_related('user').order_by('-created_at')
+    has_pending_stock_adjustments = any(it['delta'] != 0 for it in items_with_stock) or bool(deleted_items_to_return)
+
     # Enrichir les autres produits avec leur bon de confection éventuel
     other_items_with_info = []
     for oi in preparation_order.other_items.all():
@@ -4002,6 +4030,7 @@ def preparation_order_detail(request, pk):
         'items_with_stock': items_with_stock,
         'other_items': other_items_with_info,
         'can_manage': can_manage,
+        'can_edit': can_edit,
         'can_cancel': can_cancel,
         'can_manage_purchase': can_manage_purchase,
         'can_manage_stock': can_manage_stock,
@@ -4011,6 +4040,8 @@ def preparation_order_detail(request, pk):
         'has_executed_outputs': has_executed_outputs,
         'is_reopened': is_reopened,
         'deleted_items_to_return': deleted_items_to_return,
+        'history_entries': history_entries,
+        'has_pending_stock_adjustments': has_pending_stock_adjustments,
         'discussion': discussion,
         'discussion_messages': discussion_messages,
         'can_post_discussion_message': can_post_discussion_message,
@@ -4060,15 +4091,8 @@ def preparation_order_cancel(request, pk):
     Annule un bon de préparation et libère les quantités réservées.
     Si le bon avait déjà fait l'objet de sorties de stock, réintègre l'ensemble des produits sortis.
     """
-    # Vérifier les permissions
-    from common.models import UserConfig
-    try:
-        user_config = request.user.config
-        can_manage = user_config.can_manage_preparation_orders_any()
-    except UserConfig.DoesNotExist:
-        can_manage = False
-
-    if not can_manage:
+    from stock.permissions import user_can_manage_preparation_orders
+    if not user_can_manage_preparation_orders(request.user):
         messages.error(request, _("Vous n'avez pas la permission d'annuler des bons de préparation."))
         return redirect('stock:preparation_order_detail', pk=pk)
 
@@ -4108,6 +4132,12 @@ def preparation_order_cancel(request, pk):
                             stock.save()
 
             preparation_order.cancel()
+            preparation_order.log_history(
+                action="cancelled",
+                description=_("Annulation du bon de préparation (quantités réservées libérées, stock restitué le cas échéant)"),
+                user=request.user,
+                details={'status': 'cancelled'},
+            )
             messages.success(request, _("Le bon de préparation #{} a été annulé.").format(preparation_order.order_number))
     else:
         messages.error(request, _("Ce bon ne peut pas être annulé."))
@@ -4120,14 +4150,8 @@ def preparation_order_reopen(request, pk):
     """
     Réouvre un bon de préparation traité pour permettre sa modification (statut : to_process).
     """
-    from common.models import UserConfig
-    try:
-        user_config = request.user.config
-        can_manage = user_config.can_manage_preparation_orders_any()
-    except UserConfig.DoesNotExist:
-        can_manage = False
-
-    if not can_manage:
+    from stock.permissions import user_can_manage_preparation_orders
+    if not user_can_manage_preparation_orders(request.user):
         messages.error(request, _("Vous n'avez pas la permission de réouvrir des bons de préparation."))
         return redirect('stock:preparation_order_detail', pk=pk)
 
@@ -4135,6 +4159,12 @@ def preparation_order_reopen(request, pk):
 
     if preparation_order.status == 'processed':
         preparation_order.reopen()
+        preparation_order.log_history(
+            action="reopened",
+            description=_("Réouverture du bon de préparation (statut : À traiter)"),
+            user=request.user,
+            details={'status': 'to_process'},
+        )
         messages.success(request, _("Le bon de préparation #{} a été réouvert (statut : À traiter).").format(preparation_order.order_number))
         return redirect(f"{reverse('stock:preparation_order_detail', args=[pk])}?open_edit=1")
     else:
@@ -4149,21 +4179,18 @@ def preparation_order_reopen(request, pk):
 def preparation_order_edit(request, pk):
     """
     API JSON pour modifier les articles d'un bon de préparation (ajout, suppression, modification de quantité).
-    Réservé aux utilisateurs avec le droit de gérer les bons de préparation.
+    Réservé aux utilisateurs avec le droit de gérer les bons de préparation (y compris magasiniers).
+    Possible aux statuts 'to_process', 'pending' ou 'processed'.
     """
-    from common.models import UserConfig
+    from stock.permissions import user_can_edit_preparation_order
     from django.http import JsonResponse
 
-    try:
-        user_config = request.user.config
-        if not user_config.can_manage_preparation_orders_any():
-            return JsonResponse({'error': _("Droits insuffisants.")}, status=403)
-    except UserConfig.DoesNotExist:
-        return JsonResponse({'error': _("Droits insuffisants.")}, status=403)
-
     preparation_order = get_object_or_404(PreparationOrder, pk=pk)
 
-    if preparation_order.status not in ['to_process', 'pending']:
+    if not user_can_edit_preparation_order(request.user, preparation_order):
+        return JsonResponse({'error': _("Droits insuffisants ou bon non modifiable.")}, status=403)
+
+    if preparation_order.status not in ['to_process', 'pending', 'processed']:
         return JsonResponse({'error': _("Ce bon ne peut plus être modifié.")}, status=400)
 
     if request.method == 'GET':
@@ -4223,6 +4250,23 @@ def preparation_order_edit(request, pk):
             if not created:
                 item.quantity += quantity
                 item.save()
+                preparation_order.log_history(
+                    action="item_added",
+                    description=_("Ajout de {qty} × {product} (nouvelle quantité : {total})").format(
+                        qty=quantity, product=product.name, total=item.quantity
+                    ),
+                    user=request.user,
+                    details={'product_id': product.pk, 'product_name': product.name, 'quantity_added': quantity, 'new_quantity': item.quantity},
+                )
+            else:
+                preparation_order.log_history(
+                    action="item_added",
+                    description=_("Ajout du produit {product} (quantité : {qty})").format(
+                        product=product.name, qty=quantity
+                    ),
+                    user=request.user,
+                    details={'product_id': product.pk, 'product_name': product.name, 'quantity': quantity},
+                )
             return JsonResponse({
                 'id': item.pk,
                 'product_id': product.pk,
@@ -4253,6 +4297,22 @@ def preparation_order_edit(request, pk):
             if prod_order and prod_order.status == ProductionOrder.STATUS_TO_PROCESS:
                 prod_order.quantity = quantity
                 prod_order.save(update_fields=['quantity', 'updated_at'])
+
+            if quantity != old_quantity:
+                preparation_order.log_history(
+                    action="quantity_changed",
+                    description=_("Quantité de {product} modifiée de {old_qty} à {new_qty}").format(
+                        product=item.product.name, old_qty=old_quantity, new_qty=quantity
+                    ),
+                    user=request.user,
+                    details={
+                        'item_id': item.pk,
+                        'product_id': item.product.pk,
+                        'product_name': item.product.name,
+                        'old_quantity': old_quantity,
+                        'new_quantity': quantity,
+                    },
+                )
             return JsonResponse({'id': item.pk, 'quantity': item.quantity})
 
         elif action == 'remove_item':
@@ -4260,6 +4320,10 @@ def preparation_order_edit(request, pk):
             if not item_id:
                 return JsonResponse({'error': _("Données invalides.")}, status=400)
             item = get_object_or_404(PreparationOrderItem, pk=item_id, preparation_order=preparation_order)
+            prod_name = item.product.name
+            prod_id = item.product.pk
+            removed_qty = item.quantity
+
             # Vérifier si un bon de confection est lié
             prod_order = item.production_orders.first()
             if prod_order and prod_order.status != ProductionOrder.STATUS_TO_PROCESS:
@@ -4279,6 +4343,15 @@ def preparation_order_edit(request, pk):
             else:
                 item.delete()
 
+            preparation_order.log_history(
+                action="item_removed",
+                description=_("Suppression du produit {product} (quantité initiale : {qty})").format(
+                    product=prod_name, qty=removed_qty
+                ),
+                user=request.user,
+                details={'product_id': prod_id, 'product_name': prod_name, 'quantity': removed_qty},
+            )
+
             return JsonResponse({'deleted': item_id})
 
         elif action == 'add_other_item':
@@ -4311,6 +4384,14 @@ def preparation_order_edit(request, pk):
                 category=category,
                 sign_panel_type=sign_panel_type,
             )
+            preparation_order.log_history(
+                action="other_item_added",
+                description=_("Ajout d'article personnalisé : {desc} (quantité : {qty})").format(
+                    desc=description, qty=quantity
+                ),
+                user=request.user,
+                details={'description': description, 'quantity': quantity},
+            )
             return JsonResponse({
                 'id': oi.pk,
                 'description': oi.description,
@@ -4331,6 +4412,8 @@ def preparation_order_edit(request, pk):
             if prod_order and prod_order.status != ProductionOrder.STATUS_TO_PROCESS:
                 return JsonResponse({'error': _("Ce produit a un bon de confection en cours ou terminé ({code}, statut : {status}). Modification impossible.").format(
                     code=prod_order.code, status=prod_order.get_status_display())}, status=400)
+            old_description = oi.description
+            old_qty = oi.quantity
             description = (data.get('description') or '').strip()
             quantity = data.get('quantity')
             if description:
@@ -4363,6 +4446,23 @@ def preparation_order_edit(request, pk):
             if quantity is not None and prod_order and prod_order.status == ProductionOrder.STATUS_TO_PROCESS:
                 prod_order.quantity = oi.quantity
                 prod_order.save(update_fields=['quantity', 'updated_at'])
+
+            if old_description != oi.description or old_qty != oi.quantity:
+                preparation_order.log_history(
+                    action="other_item_updated",
+                    description=_("Modification d'article personnalisé : {desc} (quantité : {qty})").format(
+                        desc=oi.description, qty=oi.quantity
+                    ),
+                    user=request.user,
+                    details={
+                        'item_id': oi.pk,
+                        'old_description': old_description,
+                        'new_description': oi.description,
+                        'old_quantity': old_qty,
+                        'new_quantity': oi.quantity,
+                    },
+                )
+
             return JsonResponse({
                 'id': oi.pk,
                 'description': oi.description,
@@ -4378,6 +4478,8 @@ def preparation_order_edit(request, pk):
             if not oi_id:
                 return JsonResponse({'error': _("Données invalides.")}, status=400)
             oi = get_object_or_404(PreparationOrderOtherItem, pk=oi_id, preparation_order=preparation_order)
+            oi_desc = oi.description
+            oi_qty = oi.quantity
             # Vérifier si un bon de confection est lié
             prod_order = oi.production_orders.first()
             if prod_order and prod_order.status != ProductionOrder.STATUS_TO_PROCESS:
@@ -4387,6 +4489,14 @@ def preparation_order_edit(request, pk):
             if prod_order and prod_order.status == ProductionOrder.STATUS_TO_PROCESS:
                 prod_order.cancel()
             oi.delete()
+            preparation_order.log_history(
+                action="other_item_removed",
+                description=_("Suppression de l'article personnalisé : {desc} (quantité : {qty})").format(
+                    desc=oi_desc, qty=oi_qty
+                ),
+                user=request.user,
+                details={'description': oi_desc, 'quantity': oi_qty},
+            )
             return JsonResponse({'deleted': oi_id})
 
         return JsonResponse({'error': _("Action inconnue.")}, status=400)
@@ -4396,38 +4506,37 @@ def preparation_order_edit(request, pk):
 
 def preparation_order_process(request, pk):
     """
-    Traite un bon de préparation - permet de sortir les produits du stock
+    Traite un bon de préparation - permet de sortir les produits du stock.
+    Accessible également au statut 'processed' pour régulariser les stocks après modification.
     """
     # Vérifier les permissions
-    try:
-        user_config = request.user.config
-        can_manage = (
-            request.user.is_superuser
-            or user_config.has_role('admin')
-            or user_config.can_manage_preparation_orders_any()
-        )
-    except UserConfig.DoesNotExist:
-        can_manage = False
-    
-    if not can_manage:
+    from stock.permissions import user_can_manage_preparation_orders
+    if not user_can_manage_preparation_orders(request.user):
         messages.error(request, _("Vous n'avez pas la permission de traiter des bons de préparation."))
         return redirect('stock:stock_movements')
     
+    user_config = getattr(request.user, 'config', None)
+    
     # Récupérer les entrepôts autorisés pour l'utilisateur
-    if request.user.is_superuser or user_config.has_role('admin'):
+    if request.user.is_superuser or (user_config and user_config.has_role('admin')):
         allowed_locations = WarehouseLocation.objects.select_related('warehouse').all()
-    else:
+    elif user_config:
         user_warehouses = user_config.userwarehouses.filter(can_manage_preparation_orders=True).values_list('warehouse_id', flat=True)
-        allowed_locations = WarehouseLocation.objects.filter(
-            warehouse_id__in=user_warehouses
-        ).select_related('warehouse')
+        if user_config.has_role('stock_manager') and not user_warehouses.exists():
+            allowed_locations = WarehouseLocation.objects.select_related('warehouse').all()
+        else:
+            allowed_locations = WarehouseLocation.objects.filter(
+                warehouse_id__in=user_warehouses
+            ).select_related('warehouse')
+    else:
+        allowed_locations = WarehouseLocation.objects.none()
     
     preparation_order = get_object_or_404(
         PreparationOrder.objects.prefetch_related('preparationorderitem_set__product'),
         pk=pk
     )
     
-    if preparation_order.status not in ['to_process', 'pending']:
+    if preparation_order.status not in ['to_process', 'pending', 'processed']:
         messages.error(request, _("Ce bon ne peut plus être traité."))
         return redirect('stock:preparation_order_detail', pk=pk)
     
@@ -4626,6 +4735,12 @@ def preparation_order_process(request, pk):
 
             # Marquer comme traité
             preparation_order.mark_as_processed()
+            preparation_order.log_history(
+                action="processed",
+                description=_("Traitement du bon de préparation (mouvements de stock appliqués)"),
+                user=request.user,
+                details={'status': 'processed'},
+            )
             messages.success(request, _("Le bon de préparation #{} a été traité avec succès.").format(
                 preparation_order.order_number
             ))
@@ -4881,18 +4996,15 @@ def preparation_order_document_upload(request, pk):
     """
     Upload AJAX d'un ou plusieurs documents sur un bon de préparation.
     """
-    from common.models import UserConfig
+    from stock.permissions import user_can_edit_preparation_order
     from common.private_files.helpers import build_private_url
     from django.urls import reverse
 
-    try:
-        user_config = request.user.config
-        if not user_config.can_manage_preparation_orders_any():
-            return JsonResponse({'error': _("Droits insuffisants.")}, status=403)
-    except UserConfig.DoesNotExist:
+    preparation_order = get_object_or_404(PreparationOrder, pk=pk)
+
+    if not user_can_edit_preparation_order(request.user, preparation_order):
         return JsonResponse({'error': _("Droits insuffisants.")}, status=403)
 
-    preparation_order = get_object_or_404(PreparationOrder, pk=pk)
     files = request.FILES.getlist('documents')
     if not files:
         return JsonResponse({'error': _("Aucun fichier fourni.")}, status=400)
@@ -4904,6 +5016,12 @@ def preparation_order_document_upload(request, pk):
             file=f,
             name=f.name,
         )
+        preparation_order.log_history(
+            action="document_added",
+            description=_("Ajout du document joint : {name}").format(name=doc.name or doc.filename()),
+            user=request.user,
+            details={'document_id': doc.pk, 'filename': doc.filename()},
+        )
         created.append({
             'id': doc.pk,
             'filename': doc.filename(),
@@ -4921,17 +5039,22 @@ def preparation_order_document_delete(request, doc_id):
     """
     Suppression AJAX d'un document de bon de préparation.
     """
-    from common.models import UserConfig
-
-    try:
-        user_config = request.user.config
-        if not user_config.can_manage_preparation_orders_any():
-            return JsonResponse({'error': _("Droits insuffisants.")}, status=403)
-    except UserConfig.DoesNotExist:
-        return JsonResponse({'error': _("Droits insuffisants.")}, status=403)
+    from stock.permissions import user_can_edit_preparation_order
 
     doc = get_object_or_404(PreparationOrderDocument, pk=doc_id)
+    po = doc.preparation_order
+
+    if not user_can_edit_preparation_order(request.user, po):
+        return JsonResponse({'error': _("Droits insuffisants.")}, status=403)
+
+    doc_name = doc.name or doc.filename()
     doc.delete()
+    po.log_history(
+        action="document_removed",
+        description=_("Suppression du document joint : {name}").format(name=doc_name),
+        user=request.user,
+        details={'document_id': doc_id, 'filename': doc_name},
+    )
     return JsonResponse({'deleted': doc_id})
 
 
@@ -6143,18 +6266,9 @@ def serialized_item_delete(request, pk):
 @require_POST
 def preparation_order_toggle_loan_return(request, pk):
     from django.http import HttpResponseRedirect
-    from common.models import UserConfig
-    try:
-        user_config = request.user.config
-        can_manage = (
-            request.user.is_superuser
-            or user_config.has_role('admin')
-            or user_config.can_manage_preparation_orders_any()
-        )
-    except UserConfig.DoesNotExist:
-        can_manage = False
+    from stock.permissions import user_can_manage_preparation_orders
 
-    if not can_manage:
+    if not user_can_manage_preparation_orders(request.user):
         messages.error(request, _("Vous n'avez pas la permission de modifier ce prêt."))
         return redirect('stock:preparation_order_detail', pk=pk)
 
@@ -6166,6 +6280,14 @@ def preparation_order_toggle_loan_return(request, pk):
     # Synchroniser les lots sortants liés
     preparation_order.stock_batches.filter(movement_type=StockMovementBatch.TYPE_OUT).update(loan_returned=returned)
 
+    status_label = _("Retourné") if returned else _("Non retourné")
+    preparation_order.log_history(
+        action="loan_updated",
+        description=_("Statut de retour du prêt modifié : {status}").format(status=status_label),
+        user=request.user,
+        details={'loan_returned': returned},
+    )
+
     messages.success(request, _("Statut de retour mis à jour."))
     referer = request.META.get('HTTP_REFERER')
     if referer:
@@ -6203,6 +6325,14 @@ def stock_movement_batch_toggle_loan_return(request, pk):
     if batch.preparation_order:
         batch.preparation_order.loan_returned = returned
         batch.preparation_order.save(update_fields=['loan_returned'])
+        batch.preparation_order.log_history(
+            action="loan_updated",
+            description=_("Statut de retour du prêt synchronisé : {status}").format(
+                status=_("Retourné") if returned else _("Non retourné")
+            ),
+            user=request.user,
+            details={'loan_returned': returned, 'batch_id': batch.pk},
+        )
 
     messages.success(request, _("Statut de retour mis à jour."))
     referer = request.META.get('HTTP_REFERER')
@@ -6215,18 +6345,9 @@ def stock_movement_batch_toggle_loan_return(request, pk):
 @require_POST
 def preparation_order_update_loan_info(request, pk):
     from django.http import HttpResponseRedirect
-    from common.models import UserConfig
-    try:
-        user_config = request.user.config
-        can_manage = (
-            request.user.is_superuser
-            or user_config.has_role('admin')
-            or user_config.can_manage_preparation_orders_any()
-        )
-    except UserConfig.DoesNotExist:
-        can_manage = False
+    from stock.permissions import user_can_manage_preparation_orders
 
-    if not can_manage:
+    if not user_can_manage_preparation_orders(request.user):
         messages.error(request, _("Vous n'avez pas la permission de modifier ce prêt."))
         return redirect('stock:preparation_order_detail', pk=pk)
 
@@ -6251,6 +6372,14 @@ def preparation_order_update_loan_info(request, pk):
         estimated_return_date=estimated_return_date
     )
 
+    loan_desc = _("Prêt activé (retour prévu : {date})").format(date=estimated_return_date_str or _("non défini")) if is_loan else _("Prêt désactivé")
+    preparation_order.log_history(
+        action="loan_updated",
+        description=_("Informations de prêt modifiées : {desc}").format(desc=loan_desc),
+        user=request.user,
+        details={'is_loan': is_loan, 'estimated_return_date': estimated_return_date_str},
+    )
+
     messages.success(request, _("Informations de prêt enregistrées."))
     referer = request.META.get('HTTP_REFERER')
     if referer: