sky wheel: element contributor display; sign + house tooltips — TDD

sky_save now re-fetches from PySwiss server-side on save so stored
chart_data always carries enriched element format (contributors/stellia/
parades). New sky/data endpoint serves fresh PySwiss data to the My Sky
applet on load, replacing the stale inline json_script approach.

natus-wheel.js: sign ring slices (data-sign-name) and house ring slices
(data-house) now have click handlers with _activateSign/_activateHouse;
em-dash fallback added for classic elements with empty contributor lists.
Action URLs sky/preview, sky/save, sky/data lose trailing slashes.

Jasmine: T12 sign tooltip, T13 house tooltip, T14 enriched element
contributor display (symbols, Stellium/Parade formations, em-dash fallback).

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

src/apps/dashboard/views.py

@@ -301,8 +301,8 @@ def _sky_natus_preview(request):
 @login_required(login_url="/")
 def sky_view(request):
     return render(request, "apps/dashboard/sky.html", {
-        "preview_url": request.build_absolute_uri("/dashboard/sky/preview/"),
-        "save_url":    request.build_absolute_uri("/dashboard/sky/save/"),
+        "preview_url": request.build_absolute_uri("/dashboard/sky/preview"),
+        "save_url":    request.build_absolute_uri("/dashboard/sky/save"),
         "saved_sky":   request.user.sky_chart_data,
         "saved_birth_dt":    request.user.sky_birth_dt,
         "saved_birth_place": request.user.sky_birth_place,
@@ -327,21 +327,72 @@ def sky_save(request):
 
     user = request.user
     birth_dt_str = body.get('birth_dt', '')
+    birth_dt_utc = None
     if birth_dt_str:
         try:
             naive = datetime.fromisoformat(birth_dt_str.replace('Z', '+00:00'))
             user.sky_birth_dt = naive if naive.tzinfo else naive.replace(
                 tzinfo=zoneinfo.ZoneInfo('UTC')
             )
+            birth_dt_utc = user.sky_birth_dt.astimezone(zoneinfo.ZoneInfo('UTC'))
         except ValueError:
             user.sky_birth_dt = None
     user.sky_birth_lat    = body.get('birth_lat')
     user.sky_birth_lon    = body.get('birth_lon')
     user.sky_birth_place  = body.get('birth_place', '')
     user.sky_house_system = body.get('house_system', 'O')
-    user.sky_chart_data   = body.get('chart_data')
+
+    lat_str = body.get('birth_lat')
+    lon_str = body.get('birth_lon')
+    if birth_dt_utc and lat_str is not None and lon_str is not None:
+        try:
+            dt_iso = birth_dt_utc.strftime('%Y-%m-%dT%H:%M:%SZ')
+            resp = http_requests.get(
+                settings.PYSWISS_URL + '/api/chart/',
+                params={'dt': dt_iso, 'lat': str(lat_str), 'lon': str(lon_str)},
+                timeout=5,
+            )
+            resp.raise_for_status()
+            enriched = resp.json()
+            if 'elements' in enriched and 'Earth' in enriched['elements']:
+                enriched['elements']['Stone'] = enriched['elements'].pop('Earth')
+            user.sky_chart_data = enriched
+        except Exception:
+            user.sky_chart_data = body.get('chart_data')
+    else:
+        user.sky_chart_data = body.get('chart_data')
+
     user.save(update_fields=[
         'sky_birth_dt', 'sky_birth_lat', 'sky_birth_lon',
         'sky_birth_place', 'sky_house_system', 'sky_chart_data',
     ])
     return JsonResponse({"saved": True})
+
+
+@login_required(login_url="/")
+def sky_natus_data(request):
+    user = request.user
+    if not user.sky_birth_lat or not user.sky_birth_lon or not user.sky_birth_dt:
+        return HttpResponse(status=404)
+
+    try:
+        utc_dt = user.sky_birth_dt.astimezone(zoneinfo.ZoneInfo('UTC'))
+        dt_iso = utc_dt.strftime('%Y-%m-%dT%H:%M:%SZ')
+        resp = http_requests.get(
+            settings.PYSWISS_URL + '/api/chart/',
+            params={
+                'dt': dt_iso,
+                'lat': str(user.sky_birth_lat),
+                'lon': str(user.sky_birth_lon),
+            },
+            timeout=5,
+        )
+        resp.raise_for_status()
+    except Exception:
+        return HttpResponse(status=502)
+
+    data = resp.json()
+    if 'elements' in data and 'Earth' in data['elements']:
+        data['elements']['Stone'] = data['elements'].pop('Earth')
+    data['distinctions'] = _compute_distinctions(data['planets'], data['houses'])
+    return JsonResponse(data)