fix: sort import jobs by newest first and fix language parameter

Sorting:
- Add id DESC as tiebreaker when created_at timestamps are equal
- Ensures consistent newest-first ordering on imports and marketplace pages

Language bug fix:
- Add language field to startImport() payload in marketplace.js
- Add language column to MarketplaceImportJob database model
- Store and return language in API responses
- Add cache-busting version parameter to script tag

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/services/marketplace_import_job_service.py

@@ -166,7 +166,10 @@ class MarketplaceImportJobService:
 
             # Order by creation date (newest first) and apply pagination
             jobs = (
-                query.order_by(MarketplaceImportJob.created_at.desc())
+                query.order_by(
+                    MarketplaceImportJob.created_at.desc(),
+                    MarketplaceImportJob.id.desc(),  # Tiebreaker for same timestamp
+                )
                 .offset(skip)
                 .limit(limit)
                 .all()
@@ -249,7 +252,10 @@ class MarketplaceImportJobService:
             total = query.count()
             skip = (page - 1) * limit
             jobs = (
-                query.order_by(MarketplaceImportJob.created_at.desc())
+                query.order_by(
+                    MarketplaceImportJob.created_at.desc(),
+                    MarketplaceImportJob.id.desc(),  # Tiebreaker for same timestamp
+                )
                 .offset(skip)
                 .limit(limit)
                 .all()

app/templates/admin/marketplace.html

@@ -347,5 +347,5 @@
 {% endblock %}
 
 {% block extra_scripts %}
-<script src="{{ url_for('static', path='admin/js/marketplace.js') }}"></script>
+<script src="{{ url_for('static', path='admin/js/marketplace.js') }}?v=2"></script>
 {% endblock %}