feat(hud): Cyber HUD theme with GPU contact sonar (#706)

Add the opt-in Cyber HUD layout with coordinated map and cockpit panel
styling, GPU-only contact sonar (rings, range, power, opacity, sector) with
native-rendering fallback, and set_cyber_sonar voice controls. Sonar visual
style inspired by kk376's tactical naval sonar (#214).

Co-authored-by: Sameh Khamis <[email protected]>
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

src/ui/templates/layer-panels.html

@@ -21,6 +21,7 @@
         <span class="panel-divider"></span>
         <button class="panel-collapse-btn" data-collapse-target="cctv-panel" title="Collapse panel">+</button>
       </div>
+      <div class="cyber-panel-body" data-rail-scroller>
       <div id="cctv-frame-wrap" class="cctv-frame-wrap">
         <img id="cctv-frame" alt="CCTV feed frame" />
         <canvas id="cctv-video" class="cctv-frame" hidden></canvas>
@@ -66,6 +67,7 @@
       </div>
       <div class="cctv-summary-label">SCENE SUMMARY</div>
       <div id="cctv-summary">Enable CCTV to start camera-linked intelligence summaries.</div>
+      </div>
     </div>
   </div>