feat: admin scenario PDF download + business plan export tests

Add /scenarios/<id>/pdf admin route for direct PDF generation via WeasyPrint.
Fix plan.html Jinja template: .items → ['items'] to avoid dict method collision.
Add scenario fixture in conftest.py and comprehensive test suite for business
plan sections, PDF generation, worker handler, and export routes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/padelnomics/admin/routes.py

@@ -1406,6 +1406,48 @@ async def scenario_preview(scenario_id: int):
     )
 
 
+@bp.route("/scenarios/<int:scenario_id>/pdf")
+@role_required("admin")
+async def scenario_pdf(scenario_id: int):
+    """Generate and immediately download a business plan PDF for a published scenario."""
+    from quart import request as req
+    from ..businessplan import get_plan_sections
+    from ..planner.calculator import validate_state
+
+    scenario = await fetch_one("SELECT * FROM published_scenarios WHERE id = ?", (scenario_id,))
+    if not scenario:
+        return jsonify({"error": "Scenario not found."}), 404
+
+    lang = req.args.get("lang", "en")
+    if lang not in ("en", "de"):
+        lang = "en"
+
+    state = validate_state(json.loads(scenario["state_json"]))
+    d = json.loads(scenario["calc_json"])
+    sections = get_plan_sections(state, d, lang)
+    sections["scenario_name"] = scenario["title"]
+    sections["location"] = scenario.get("location", "")
+
+    from pathlib import Path
+    template_dir = Path(__file__).parent.parent / "templates" / "businessplan"
+    html_template = (template_dir / "plan.html").read_text()
+    css = (template_dir / "plan.css").read_text()
+
+    from jinja2 import Template
+    rendered_html = Template(html_template).render(s=sections, css=css)
+
+    from weasyprint import HTML
+    pdf_bytes = HTML(string=rendered_html).write_pdf()
+
+    slug = scenario["slug"] or f"scenario-{scenario_id}"
+    filename = f"padel-business-plan-{slug}-{lang}.pdf"
+    return Response(
+        pdf_bytes,
+        mimetype="application/pdf",
+        headers={"Content-Disposition": f'attachment; filename="{filename}"'},
+    )
+
+
 # =============================================================================
 # Article Management
 # =============================================================================

web/src/padelnomics/admin/templates/admin/scenarios.html

@@ -38,6 +38,8 @@
           <td class="mono text-sm">{{ s.created_at[:10] }}</td>
           <td class="text-right">
             <a href="{{ url_for('admin.scenario_preview', scenario_id=s.id) }}" class="btn-outline btn-sm">Preview</a>
+            <a href="{{ url_for('admin.scenario_pdf', scenario_id=s.id, lang='en') }}" class="btn-outline btn-sm">PDF EN</a>
+            <a href="{{ url_for('admin.scenario_pdf', scenario_id=s.id, lang='de') }}" class="btn-outline btn-sm">PDF DE</a>
             <a href="{{ url_for('admin.scenario_edit', scenario_id=s.id) }}" class="btn-outline btn-sm">Edit</a>
             <form method="post" action="{{ url_for('admin.scenario_delete', scenario_id=s.id) }}" class="m-0" style="display: inline;">
               <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">

web/src/padelnomics/templates/businessplan/plan.html

@@ -53,7 +53,7 @@
     <tr><th>{{ s.labels.item }}</th><th style="text-align:right">{{ s.labels.amount }}</th><th>{{ s.labels.notes }}</th></tr>
   </thead>
   <tbody>
-    {% for item in s.investment.items %}
+    {% for item in s.investment['items'] %}
     <tr>
       <td>{{ item.name }}</td>
       <td style="text-align:right">{{ item.formatted_amount }}</td>
@@ -94,7 +94,7 @@
     <tr><th>{{ s.labels.item }}</th><th style="text-align:right">{{ s.labels.monthly }}</th><th>{{ s.labels.notes }}</th></tr>
   </thead>
   <tbody>
-    {% for item in s.operations.items %}
+    {% for item in s.operations['items'] %}
     <tr>
       <td>{{ item.name }}</td>
       <td style="text-align:right">{{ item.formatted_amount }}</td>