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/templates/apps/dashboard/sky.html

@@ -20,13 +20,13 @@
                     <div class="natus-field">
                         <label for="id_nf_date">Birth date</label>
                         <input id="id_nf_date" name="date" type="date" required
-                               {% if saved_birth_dt %}value="{{ saved_birth_dt|date:'Y-m-d' }}"{% endif %}>
+                               {% if saved_birth_date %}value="{{ saved_birth_date }}"{% endif %}>
                     </div>
 
                     <div class="natus-field">
                         <label for="id_nf_time">Birth time</label>
                         <input id="id_nf_time" name="time" type="time"
-                               value="{% if saved_birth_dt %}{{ saved_birth_dt|time:'H:i' }}{% else %}12:00{% endif %}">
+                               value="{{ saved_birth_time|default:'12:00' }}">
                         <small>Local time at birth place. Use 12:00 if unknown.</small>
                     </div>
 
@@ -121,7 +121,7 @@
   const PLACE_DELAY  = 400;
   const CHART_DELAY  = 300;
 
-  NatusWheel.preload();
+  const _preloadReady = NatusWheel.preload();
 
   // ── Status helper ───────────────────────────────────────────────────────
 
@@ -313,9 +313,18 @@
     return m ? m[1] : '';
   }
 
-  // ── Auto-preview on load if form is pre-filled from saved sky ───────────
+  // ── Draw saved sky on load; only call PySwiss if no saved chart yet ─────
 
-  if (_formReady()) schedulePreview();
+  const _savedSky = {{ saved_sky_json|safe }};
+  _preloadReady.then(() => {
+    if (_savedSky) {
+      _lastChartData = _savedSky;
+      confirmBtn.disabled = false;
+      NatusWheel.draw(svgEl, _savedSky);
+    } else if (_formReady()) {
+      schedulePreview();
+    }
+  });
 })();
 </script>
 {% endblock %}