tray sig-card tooltip: portal w. PRV|NXT pager — TDD

Phase 2 of the apps.tooltips integration on the tray. Hovering
.tray-sig-card > .sig-stage-card opens #id_tooltip_portal w. an FYI panel
that mirrors #id_fan_fyi_panel (Energy / Operation entries cycled via
PRV|NXT), but w.o. the stage block, w.o. Reversal entries, & w.o. the fan
stage's click-to-dismiss handler — the panel-body click is reserved for
future drag-and-drop on .tray-sig-card:active.

- _partials/_sig_fyi_panel.html — new partial, the .sig-info + PRV|NXT
  block extracted out of game_kit.html, _sig_select_overlay.html, &
  _sea_overlay.html. {% include %}d back from those 3 callers; pure
  copy-paste extraction (no behavioural change to fan stage, sig select,
  or sea select).
- room.html: .tray-sig-card > .sig-stage-card gains data-energies +
  data-operations (the only attrs StageCard.buildInfoData reads), keyed
  off my_tray_sig.energies_json / .operations_json (existing TarotCard
  properties).
- tray-tooltip.js: new sig branch — _showSig() builds the panel inline,
  paints via StageCard.renderFyi, & wires PRV|NXT cycle handlers; the
  mousemove union now covers the .fyi-prev / .fyi-next btn rects (the
  btns hang past the portal's left & right edges) so mouse-over them
  keeps the panel alive. Click stopPropagation on the btns prevents the
  panel-body click from reaching anything else.
- TrayTooltipSpec: 6 new sig-branch specs (panel structure; first energy
  entry rendered; PRV|NXT cycling; body click no-dismiss; pointer over
  btn rects keeps panel alive; pointer outside full union clears).
- test_component_tray_tooltip.py: 4 sig FTs (hover populates portal w.
  Energy/TESTLIBIDO/effect/1-of-2; PRV|NXT cycle; body click does NOT
  dismiss; mouseleave clears).

FT helper note — the sig FT's _hover dispatches a synthetic mouseenter
via JS rather than ActionChains.move_to_element, because the role-card
& sig-card cells sit side-by-side in the tray grid: the pointer's
animated path crosses the role-card on its way to the sig-card &
opens the role tooltip mid-flight, which then occludes the sig stage
by the time the move lands. Direct dispatch lands the event on the
intended trigger w.o. the cross-cell drag-by.

313 epic ITs + 335 Jasmine specs (incl. 6 new) + 6 tray-tooltip FTs all
green.

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/templates/apps/gameboard/_partials/_sea_overlay.html

@@ -176,16 +176,7 @@
                     <p class="stat-face-label">Reversal</p>
                     <ul class="stat-keywords" id="id_sea_stat_reversed"></ul>
                 </div>
-                <div class="sig-info" id="id_sea_fyi_panel" style="display:none">
-                    <div class="sig-info-header">
-                        <h4 class="sig-info-title"></h4>
-                        <p class="sig-info-type"></p>
-                    </div>
-                    <p class="sig-info-effect"></p>
-                    <span class="sig-info-index"></span>
-                </div>
-                <button class="btn btn-nav-left fyi-prev" type="button">PRV</button>
-                <button class="btn btn-nav-right fyi-next" type="button">NXT</button>
+                {% include "apps/gameboard/_partials/_sig_fyi_panel.html" with panel_id="id_sea_fyi_panel" panel_extra_attrs='style="display:none"' %}
             </div>
         </div>
     </div>