feat(npcs): inspect cards, Show overlay, and optional external link

Clicking an NPC tile opens description cards (multi-select accordion); Show puts avatars on screen. Optional URL opens a webview tab. Avatar pan in the editor commits on pointer up.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/renderer/shared/playerToken/PlayerTokenView.module.css

@@ -25,6 +25,15 @@
   cursor: grabbing;
 }
 
+.circlePick {
+  cursor: pointer;
+}
+
+.circleDrop {
+  border-color: var(--accent, #a78bfa);
+  box-shadow: 0 0 0 3px var(--accent-fill-soft, rgba(167, 139, 250, 0.28));
+}
+
 .avatar {
   position: absolute;
   left: 50%;
@@ -47,6 +56,25 @@
   );
 }
 
+.avatarEmptySolid {
+  background: #18181b;
+}
+
+.avatarEmptyHint {
+  position: absolute;
+  inset: 12px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  text-align: center;
+  font-size: 11px;
+  font-weight: 700;
+  line-height: 1.35;
+  color: var(--text2, #a1a1aa);
+  pointer-events: none;
+  user-select: none;
+}
+
 .namePlate {
   max-width: 100%;
   padding: 4px 10px;