MY SKY: dashboard applet + full-page natal chart — TDD

- User model: sky_birth_dt/lat/lon/place/house_system/chart_data fields (lyric migration 0018)
- Applet seed: my-sky (6×6, dashboard context) via applets migration 0009
- dashboard/sky/ — full monoapplet page: natus form + D3 wheel, LS key scoped to dashboard:sky; saves to User model
- dashboard/sky/preview/ — PySwiss proxy (same logic as epic:natus_preview, no seat check)
- dashboard/sky/save/ — persists 6 sky fields to User via update_fields
- _applet-my-sky.html: tile with h2 link to /dashboard/sky/
- 2 FTs (applet→link→form, localStorage persistence) + 12 ITs — all green

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

src/apps/lyric/models.py

@@ -47,6 +47,14 @@ class User(AbstractBaseUser):
     ap_public_key = models.TextField(blank=True, default="")
     ap_private_key = models.TextField(blank=True, default="")
 
+    # Personal natal chart (My Sky) — independent of any game room/character
+    sky_birth_dt    = models.DateTimeField(null=True, blank=True)
+    sky_birth_lat   = models.DecimalField(max_digits=9, decimal_places=4, null=True, blank=True)
+    sky_birth_lon   = models.DecimalField(max_digits=9, decimal_places=4, null=True, blank=True)
+    sky_birth_place = models.CharField(max_length=255, blank=True)
+    sky_house_system = models.CharField(max_length=1, blank=True, default="O")
+    sky_chart_data  = models.JSONField(null=True, blank=True)
+
     is_staff = models.BooleanField(default=False)
     is_superuser = models.BooleanField(default=False)