style(player): tân tân BAMBOORAFT card look — tall cells, condensed black numbers, blue paper

Match the BAMBOORAFT physical sheet:
- Cell aspect changed from square to 3:5 (taller than wide), matching
  the printed paper proportions
- Number cells rendered with .tan-tan-num: condensed system-font stack
  (Arial Narrow / Avenir Next Condensed / Roboto Condensed), font-weight
  900, negative letter-spacing for tight fall-back on platforms without
  a true condensed face. Sized text-2xl / sm:text-3xl to fill the
  taller cells. Black number on white cell.
- Default empty-cell color flipped from Minh Tân brown (#7a4a2b) to
  BAMBOORAFT blue (#1e88e5). Settings store + test updated. Users who
  picked a different color in settings keep their choice.
- Section dividers and labels recolored from orange to matching blue.
- Section labels relabelled to the BAMBOORAFT trio:
  "Tân Tân" / "An khang thịnh vượng" / "Tân Tân tốt nhất"

web/docs/codebase-summary.md

@@ -12,7 +12,7 @@
 ### Shared Components
 | File | Purpose |
 |------|---------|
-| `src/lib/PlayerBoard.svelte` | Reusable player card (9×9 grid rendered as 3 stacked 3×9 mini-cards: Minh Tân / Loại đặc biệt / Tấn tài tấn lộc). Handles crossed state, bingo popup, "Chờ X" toast. Accepts `storagePrefix` prop for multi-card isolation. Empty cells use `--empty-cell-bg` CSS var from settings store. |
+| `src/lib/PlayerBoard.svelte` | Reusable player card (9×9 grid rendered as 3 stacked 3×9 mini-cards: Tân Tân / An khang thịnh vượng / Tân Tân tốt nhất). Tall (3:5) cells with condensed bold black numbers (`tan-tan-num` font stack), white number cells, blue empty cells. Handles crossed state, bingo popup, "Chờ X" toast. Accepts `storagePrefix` prop for multi-card isolation. Empty cells use `--empty-cell-bg` CSS var from settings store. |
 | `src/lib/SettingsButton.svelte` | Gear icon + modal. Color picker + 8 preset swatches for empty-cell color. Reset-to-default button. Mounted on both `/` and `/master` headers. |
 
 ### Game Logic