My Sea DRAW SEA landing — Sprint 5 iter 1 of My Sea roadmap — TDD

DRAW SEA landing UX on /gameboard/my-sea/ for users past the [[sprint-my-sea-sign-gate-may19]] gate. DRY table hex (reused from the room shell + my-sign Sprint 4a iter 3) w. 6 chair seats labeled 1C-6C (placeholder for friend-invite per the My Sea roadmap "Six chairs retained even in solo" anchor) + central DRAW SEA `.btn-primary` mirroring SCAN SIGN on /billboard/my-sign/. Click swaps `.my-sea-page[data-phase]` from `landing` to `picker`; the picker UX itself (three-card cross w. cover/leave/loom + form col / spread dropdown / decks / LOCK HAND / DEL) lands in iters 2 + 3.

The 'C' suffix on the chair labels = "Chair" (user-locked); no role semantics (this is a solo draw, not a 6-player role assignment). `.table-seat` CSS class + `data-slot` attribute preserved so the room's existing `[data-slot="N"]` positioning rules (`_room.scss` L583-588) carry over for free — no SCSS fork; just a new `.seat-label` span inside each seat.

The 'Default deck warning' Brief banner from /billboard/my-sign/ fires verbatim when `user.equipped_deck` is None (the user is headed for a draw against the Earthman [Shabby Cardstock] backup unless they equip one first). Tagged `.my-sea-intro-banner` so FTs disambiguate from other Briefs. Same FYI (→ /gameboard/) / NVM (dismiss) action grammar.

Bundled: BACK→NVM label swap (user-edited mid-sprint) in the existing sign-gate. CSS class `.my-sea-sign-gate__back` retained — the swap was label-only — so existing FTs targeting the class still pass; docstrings + comments updated for accuracy.

Files:
- `apps/gameboard/views.py` — `my_sea` view adds 2 context keys: `no_equipped_deck` (bool) + `show_backup_intro_banner` (= user_has_sig AND no_equipped_deck). The sig-gate path still wins precedence.
- `templates/apps/gameboard/my_sea.html` — `.my-sea-page[data-phase="landing"]`; new `.my-sea-landing` block w. room-shell hex + `#id_draw_sea_btn` + 6 `.table-seat[data-slot="N"]` w. `<span class="seat-label">NC</span>`; new `.my-sea-picker` placeholder (`display:none` til DRAW SEA click); inline `<script>` for the click→data-phase swap + scaleTable re-fire on next tick (mirrors my-sign's iter-3 RAF dispatch); copies the my-sign Brief banner script block verbatim w. `.my-sea-intro-banner` post-render tag.
- `static_src/scss/_gameboard.scss` — new `.my-sea-page` + `.my-sea-landing` + `.my-sea-picker` rule blocks mirroring `.my-sign-page` / `.my-sign-landing` from `_card-deck.scss`. `.seat-label` styled in `--terUser` to match the chair iconography.
- `apps/gameboard/tests/integrated/test_views.py` — `+7 ITs` in new `MySeaDrawSeaLandingViewTest` pinning the context keys + presence/absence of `#id_draw_sea_btn` + 6 `data-slot=N` w. `NC` labels + Sprint 4b gate's precedence over the new landing.
- `functional_tests/test_game_my_sea.py` — `+5 FTs` in new `MySeaDrawSeaLandingTest` for the visible UX (hex + DRAW SEA, 6 seats labeled 1C-6C, click→picker phase swap, Brief banner on no-deck, no banner when deck equipped). Uses new `_assign_sig` helper from [[sprint-sig-page-helper-may19c]] for the user-w-sig precondition.

Tests: 25/25 FTs green across test_bill_my_sign + test_game_my_sea in 219s; 1036/1036 IT/UT green in 50s (+7 from baseline).

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Sonnet 4.6 <noreply@anthropic.com>

src/static_src/scss/_gameboard.scss

@@ -194,7 +194,7 @@ body.page-gameboard {
         align-items: center;
     }
 
-    // Applet variant — denser layout, omits BACK (the user is already on
+    // Applet variant — denser layout, omits NVM (the user is already on
     // the gameboard). Smaller line + just the FYI action surviving.
     &.my-sea-sign-gate--applet {
         padding: 0.5rem;
@@ -205,3 +205,54 @@ body.page-gameboard {
         }
     }
 }
+
+// ─── My Sea DRAW SEA landing ─────────────────────────────────────────────────
+// Sprint 5 iter 1 of [[project-my-sea-roadmap]]. When a user has a saved
+// significator (gate passed), /gameboard/my-sea/ renders this landing
+// screen: DRY table hex w. 6 chair seats labeled 1C-6C + central DRAW
+// SEA btn. Mirrors my-sign's `.my-sign-page` + `.my-sign-landing`
+// structure — same room-shell chain so room.js's scaleTable() can size
+// the hex; same flex setup so the container chain propagates real
+// height down for the scale calc.
+.my-sea-page {
+    flex: 1;
+    min-height: 0;
+    display: flex;
+    flex-direction: column;
+    position: relative;
+}
+
+.my-sea-landing {
+    flex: 1;
+    min-height: 0;
+    display: flex;
+
+    // DRAW SEA btn — centered in the hex, mirrors SCAN SIGN's 2-line
+    // font sizing so "DRAW/SEA" sits cleanly inside the 4rem circle.
+    #id_draw_sea_btn {
+        font-size: 0.75rem;
+        line-height: 1.1;
+        white-space: normal;
+    }
+
+    // Chair-seat labels (1C-6C) sit beside the chair icon. The room's
+    // .table-seat positioning by data-slot (1-6) already places them
+    // around the hex — this just sizes the label readably + colors it
+    // to match the gate's --terUser accent.
+    .table-seat .seat-label {
+        font-size: 0.8rem;
+        font-weight: 600;
+        color: rgba(var(--terUser), 1);
+        margin-left: 0.25rem;
+    }
+}
+
+.my-sea-picker {
+    // Iter-1 placeholder — iter 2 will populate w. the three-card cross
+    // (sig in center + cover/leave/loom) on a --duoUser background.
+    flex: 1;
+    min-height: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}