Add taunt button, Tab as Escape alternative, free cam Q/E removal

- OverviewMenu: taunt button (manual ping + close, hider/seek-only), Tab triggers the Escape chain (TypingGuard-gated)
- GameModeManager: LocalPlayerIsHider helper, allow E-ping in free cam (Q/E no longer used for movement)
- FreeCamController: vertical movement only via Space/Ctrl
- Icons: Icon_taunt (wired), Icon_firstperson_paint (unwired, for later)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/Scripts/GameMode/GameModeManager.cs

@@ -98,6 +98,9 @@ public class GameModeManager : MonoBehaviour
     /// <summary>True while gameplay is suspended for a modal overlay (see <see cref="SetPaused"/>).</summary>
     public bool IsPaused => _paused;
 
+    /// <summary>True while the bound local avatar is a hider (drives the overview menu's taunt button).</summary>
+    public bool LocalPlayerIsHider => _localRole == PlayerRole.Hider;
+
     /// <summary>The active mode, or - while paused - the mode that will resume. Null in the no-player state.</summary>
     public GameMode EffectiveMode =>
         ActiveMode ?? ((_resumeIndex >= 0 && _resumeIndex < _modes.Count) ? _modes[_resumeIndex] : null);
@@ -413,9 +416,9 @@ public class GameModeManager : MonoBehaviour
         }
 
         // A hider manually pings itself onto every hunter's radar (same blip as the periodic sweep), on demand.
-        // Excluded in Free Cam whose fly controls already use this key; the phase/role gate lives in MatchManager
-        // (RequestManualPing no-ops outside Seek / for a found hider), so a stray press is harmless.
-        if (_localRole == PlayerRole.Hider && !(ActiveMode is FreeCamMode) &&
+        // Works in every mode incl. Free Cam (its fly controls no longer use Q/E); the phase/role gate lives in
+        // MatchManager (RequestManualPing no-ops outside Seek / for a found hider), so a stray press is harmless.
+        if (_localRole == PlayerRole.Hider &&
             InputUtil.GameplayKeyPressed(pingKey) && MatchManager.Instance)
             MatchManager.Instance.RequestManualPing();