natus wheel: ASC/MC angles — tooltips, aspect lines, section headers, tooltip polish

- ASC/MC clickable w. DON/DOFF aspect lines (fixed: open w.o. lines; DON/DOFF
  both work; angles ring handled in _toggleAspects; lines origin at R.planetR)
- btn-disabled click-through fix: pointer-events:auto on DON/DOFF; bounding-rect
  workaround removed
- planet tooltip: applying ⇥ left, separating ↦ right; sign shown for angle partners
- sign tooltip: Planets + Cusps section headers; ordinal house + domain; em-dash fallback
- house tooltip: Planets header; Angular/Succedent/Cadent + phase labels; em-dash fallback
- element tooltips: Planets header for Fire/Stone/Air/Water; Stellium/Parade as
  section-header labels; compact single-stellium Tempo; Parade sign : planets format
- tt-ord: no negative margin in .tt-angle-house context

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

src/apps/dashboard/views.py

@@ -300,11 +300,24 @@ def _sky_natus_preview(request):
 
 @login_required(login_url="/")
 def sky_view(request):
+    chart_data = request.user.sky_chart_data
+    birth_dt = request.user.sky_birth_dt
+    saved_birth_date = ''
+    saved_birth_time = ''
+    if birth_dt:
+        if request.user.sky_birth_tz:
+            try:
+                birth_dt = birth_dt.astimezone(zoneinfo.ZoneInfo(request.user.sky_birth_tz))
+            except (zoneinfo.ZoneInfoNotFoundError, KeyError):
+                pass
+        saved_birth_date = birth_dt.strftime('%Y-%m-%d')
+        saved_birth_time = birth_dt.strftime('%H:%M')
     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"),
-        "saved_sky":         request.user.sky_chart_data,
-        "saved_birth_dt":    request.user.sky_birth_dt,
+        "saved_sky_json":    json.dumps(chart_data) if chart_data else 'null',
+        "saved_birth_date":  saved_birth_date,
+        "saved_birth_time":  saved_birth_time,
         "saved_birth_place": request.user.sky_birth_place,
         "saved_birth_lat":   request.user.sky_birth_lat,
         "saved_birth_lon":   request.user.sky_birth_lon,
@@ -329,13 +342,23 @@ def sky_save(request):
         return HttpResponse(status=400)
 
     user = request.user
+    birth_tz_str = body.get('birth_tz', '').strip()
     birth_dt_str = body.get('birth_dt', '')
     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')
-            )
+            naive = datetime.fromisoformat(birth_dt_str.replace('Z', '').replace('+00:00', ''))
+            if naive.tzinfo is None and birth_tz_str:
+                try:
+                    local_tz = zoneinfo.ZoneInfo(birth_tz_str)
+                    user.sky_birth_dt = naive.replace(tzinfo=local_tz).astimezone(
+                        zoneinfo.ZoneInfo('UTC')
+                    )
+                except (zoneinfo.ZoneInfoNotFoundError, KeyError):
+                    user.sky_birth_dt = naive.replace(tzinfo=zoneinfo.ZoneInfo('UTC'))
+            elif naive.tzinfo is None:
+                user.sky_birth_dt = naive.replace(tzinfo=zoneinfo.ZoneInfo('UTC'))
+            else:
+                user.sky_birth_dt = naive.astimezone(zoneinfo.ZoneInfo('UTC'))
         except ValueError:
             user.sky_birth_dt = None
     user.sky_birth_lat    = body.get('birth_lat')