ROLE SELECT: block role pick without deck; SigSelect qualifier spec fix — TDD

- role-select.js: _showNoDeckWarning(stack) intercepts at openFan() — fan never
  opens when data-equipped-deck=""; warning positioned fixed over card-stack via
  getBoundingClientRect(); .guard-actions wrapper for FYI/.btn-caution + NVM/.btn-cancel
- room.html: card-stack gains data-equipped-deck="{{ equipped_deck_id|default:'' }}"
- room view context: equipped_deck_id added
- _room.scss: .role-no-deck-warning — glass guard style matching #id_guard_portal
- _base.scss + _room.scss: guard portal + no-deck warning opacity 0.5 → 0.75
  (matches .tt tooltip; light-palette handled via --tooltip-bg CSS var)
- RoleSelectSpec.js: 8 Jasmine specs — no-deck (fan blocked, warning, FYI/NVM,
  no duplicate, no POST) + deck-present pass-through; afterEach cleans up warning
- SigSelectSpec.js: card fixture gains data-levity-qualifier + data-gravity-qualifier;
  all "Leavened" expectations updated to "Elevated"

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

src/templates/apps/gameboard/room.html

@@ -27,7 +27,8 @@
                                         <div class="card-stack" data-state="{{ card_stack_state }}"
                                             data-starter-roles="{{ starter_roles|join:',' }}"
                                             data-user-slots="{{ user_slots|join:',' }}"
-                                            data-active-slot="{{ active_slot }}">
+                                            data-active-slot="{{ active_slot }}"
+                                            data-equipped-deck="{{ equipped_deck_id|default:'' }}">
                                             {% if card_stack_state == "ineligible" %}
                                                 <i class="fa-solid fa-ban"></i>
                                             {% endif %}