Add per-product wordmark + full lockup assets

For each product (pgconsole, pgschema, pgtui, pgparser), add a wordmark and a
full lockup (icon + wordmark) in public/icons/, mirroring the umbrella's
wordmark / logo-full:

- <product>-wordmark.svg — product name in APK Protocol 600 outlines (tracking
  -0.025em, no runtime webfont), tinted in the product hue.
- <product>-full.svg (+ 2x transparent .png) — icon + wordmark, word ink box
  centred on the mark and set a short gap right of it.

One universal version each (no dark/light split): the wordmark uses a vertical
mid->deep ramp of the product hue so it reads on both dark and light. Two
per-mark alignment tweaks: pgparser's wordmark is centred lower to match its
bottom-heavy triangle, and pgtui's is pulled in to offset its chevron tip.
Document the assets in DESIGN.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: tianzhou

DESIGN.md

@@ -235,6 +235,26 @@ Sources live in `public/icons/<product>.svg`. To add a product: derive a
 palette row, design a triangle-only glyph with a meaningful knockout, keep the
 silhouette in the 21..99 band.
 
+### Product wordmarks & lockups
+
+Each product has a single wordmark and lockup (no dark/light split — one
+version reads on any surface), in `public/icons/`:
+
+- `<product>-wordmark.svg` — the product name as **APK Protocol 600** outlines
+  (tracking −0.025em, no runtime webfont — the umbrella wordmark is Space
+  Grotesk, so products use the display face to stay distinct), tinted in the
+  product hue.
+- `<product>-full.svg` (+ 2× transparent `.png`) — icon + wordmark, icon
+  spanning 21..99 with the word's ink box centred on the mark centre and
+  starting a fixed gap right of the mark edge (same alignment idea as
+  `logo-full`).
+
+The icon keeps its diagonal `light→mid→deep` gradient; the wordmark is a
+**vertical `mid→deep`** ramp of the same hue (top→bottom), the darker half of
+the icon transition so it stays legible on both dark and light. Regenerate all
+four products from the font with the outlining script (fonttools reads the
+woff2 in `src/app/fonts/`); never re-typeset a wordmark as live text.
+
 ### Product tile
 
 Card in the 2×2 grid: `card` surface, hairline dividers, `tile` padding; the