Fix article editor

app/routes/tickets.py

@@ -261,8 +261,19 @@ def update_ticket(ticket_id):
         changes.append(f'priority: {old_priority} → {new_priority}')
 
     if new_assigned != old_assigned:
+        # Resolve user IDs to full names for human-readable history entries.
+        # None means unassigned.
+        def _user_label(uid):
+            if uid is None:
+                return 'Unassigned'
+            u = User.query.get(uid)
+            return u.full_name if u else f'User #{uid}'
+
         ticket.assigned_to_id = new_assigned
-        log_ticket_history(ticket, 'assigned_to', str(old_assigned), str(new_assigned), current_user.id)
+        log_ticket_history(ticket, 'assigned_to',
+                           _user_label(old_assigned),
+                           _user_label(new_assigned),
+                           current_user.id)
         changes.append(f'assigned_to: {old_assigned} → {new_assigned}')
         notify_assignment(ticket, current_user)
 
@@ -339,9 +350,35 @@ def mark_notifications_read():
 @tickets_bp.route('/kb')
 @login_required
 def knowledge_base():
-    articles = KnowledgeBase.query.filter_by(is_published=True).order_by(
-        KnowledgeBase.view_count.desc()).all()
-    return render_template('tickets/knowledge_base.html', articles=articles)
+    q        = request.args.get('q', '').strip()
+    category = request.args.get('category', '')
+    sort     = request.args.get('sort', 'popular')   # 'popular' | 'newest'
+
+    query = KnowledgeBase.query.filter_by(is_published=True)
+
+    if q:
+        query = query.filter(
+            KnowledgeBase.title.ilike(f'%{q}%') |
+            KnowledgeBase.tags.ilike(f'%{q}%')
+        )
+    if category:
+        query = query.filter_by(category=category)
+
+    if sort == 'newest':
+        query = query.order_by(KnowledgeBase.updated_at.desc())
+    else:
+        query = query.order_by(KnowledgeBase.view_count.desc())
+
+    articles   = query.all()
+    categories = sorted({a.category for a in KnowledgeBase.query.filter_by(is_published=True).with_entities(KnowledgeBase.category).distinct() if a.category})
+
+    return render_template('tickets/knowledge_base.html',
+        articles   = articles,
+        categories = categories,
+        q          = q,
+        sel_category = category,
+        sort         = sort,
+    )
 
 
 @tickets_bp.route('/kb/<int:article_id>')
@@ -367,4 +404,4 @@ def _categories():
     return [TicketCategory.HARDWARE, TicketCategory.SOFTWARE,
             TicketCategory.NETWORK, TicketCategory.ACCESS,
             TicketCategory.EMAIL, TicketCategory.PRINTER,
-            TicketCategory.PHONE, TicketCategory.SECURITY, TicketCategory.OTHER]
+            TicketCategory.PHONE, TicketCategory.SECURITY, TicketCategory.OTHER]