my-sea spectator: render owner's draw as the identical interactive cross stage; owner seated in 1C when paid OR drawn — TDD

Phase 1 + 2 of the my-sea spectator/voice batch (user-spec 2026-05-29).

── Phase 1: spectator VIEW DRAW parity ──
The visitor's VIEW DRAW rendered _my_sea_readonly_draw.html — a flat
`.my-sea-scroll` strip that, out of its applet context, blew a single card up
to fill the viewport. It now renders the SAME `.my-sea-cross` picker +
`_sea_stage` modal the owner sees, populated from the owner's draw, read-only
but fully interactive (click card → magnified stage, hover, SPIN, FYI). No
FLIP / DEL / AUTO DRAW / deck-stacks / spread combobox — the visitor watches.

- `_saved_by_position(saved_hand)` extracted as a shared helper (owner picker
  + spectator render build the IDENTICAL cross); my_sea refactored onto it.
- my_sea_visit context gains `saved_by_position`, `label_by_position`,
  `default_spread`, and the OWNER's `sea_deck_data` (so sea.js resolves each
  clicked slot's full card face for the stage).
- new `_my_sea_visit_cross.html` mirrors the owner cross + includes `_sea_stage`
  under `#id_sea_overlay`; my_sea_visit.html embeds the owner deck JSON + loads
  stage-card.js + sea.js + a trimmed seed IIFE (reconstructs SeaDeal's
  `_seaHand` from the filled slots so each card is clickable into the stage).
- deletes the obsolete `_my_sea_readonly_draw.html`.

── Phase 2: owner 1C seating ──
The owner is "seated" in 1C whenever committed to a draw cycle — paid for one
(deposit reserved / paid-through credit) OR partially/completely drawn — not
only once a card lands. Previously a paid-but-undrawn owner (the PAID DRAW
landing) and the visitor's view of her showed the semi-opaque `.fa-ban`
default. Seat 1C now carries persistent `.seated` + `.fa-circle-check`
(sync on refresh; the one-shot flare just settles into it).

- my_sea: new `seat1_seated = hand_non_empty or show_paid_draw`; my_sea.html
  seat 1C keys on it (class + data-seat-token + status icon).
- my_sea_visit: `seat1_present = owner drawn OR owner paid` so the visitor
  sees the owner seated on the spectator hex under the same conditions.
- seat flare bumped 1.5s → 2s (my-sea-seats.js GLOW_MS + _room.scss keyframe).

Tests: +2 spectator-cross ITs, +1 spectator-cross FT (Phase 1); +4 owner-seat
ITs, +2 visitor both-seated/owner-seated ITs, +1 owner-seating FT (Phase 2).
286 gameboard ITs/UTs green.

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/static_src/scss/_room.scss

@@ -631,13 +631,14 @@ html:has(.gate-backdrop) .position-strip .gate-slot button { pointer-events: aut
         color: rgba(var(--secUser), 1);
         filter: none;
     }
-    // One-shot "just seated" flare (~1.5s) played the FIRST time a viewer
+    // One-shot "just seated" flare (2s) played the FIRST time a viewer
     // sees the occupancy (my-sea-seats.js adds/removes `.seat-just-seated`,
     // localStorage-gated). Chair flares --terUser + a --ninUser glow, then
     // eases back into the steady --secUser .seated look above (user-spec
-    // 2026-05-27). Mirrors the room's .active → .role-confirmed handoff.
+    // 2026-05-29, bumped from 1.5s). Mirrors the room's .active →
+    // .role-confirmed handoff.
     &.seat-just-seated .fa-chair {
-        animation: my-sea-seat-flare 1.5s ease forwards;
+        animation: my-sea-seat-flare 2s ease forwards;
     }
 
     .seat-portrait {