Brand audit fixes: domain casing, radii, violet, seal size, page seals

- Store domain shown as Store.GregKilmer.com (no uppercase transform)
- Cards and panels 10px corners; buttons pill-shaped
- Canvas star/circuit violet switched to brand violet #6A2FE0
- Nav, store nav and footer seal at the brand's 72px minimum (nav 80px tall)
- Faint seals on contact, store cards, deck boxes, order and professional

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012aSbo2D1qP8cMFQCykf7kx

docs/THEMING.md

@@ -151,6 +151,11 @@ Font sizes use `clamp()` for fluid scaling (see the `h1`-`h4` rules in
   generated from the brand source (`newicons.py`); add icons there.
 - **Motifs:** `<Motif name="..." />` shows a brand motif from `public/motifs/`,
   copied from the brand files with ring text outlined to paths. `-light` files
-  are the Starlight recolor. One focal motif per surface, kept faint.
+  are the Starlight recolor. One focal motif per surface, kept faint. Every
+  page carries at least one seal: night-sky heroes have the turning layered
+  seal, and pages without a hero use `<PageSeal name="..." />` behind the header.
+- **Shape:** cards and panels have 10px corners (`--radius-xl`/`2xl`/`3xl` are
+  pinned to 10px); buttons and tags are pills. The Patiun seal is never shown
+  below 72px (nav and footer use 72px).
 - **Gold accents:** image frames, quote bars, dividers and rules use
   `--color-gold`; teal stays for links, buttons and icons.