feat(npcs): add groups, storyline bindings, and Foundry import

Nested NPC groups with color, graph filter, and scene/storyline binding; Foundry worlds/modules import actors into groups; storyline merge asks on NPC name conflicts and reports NPC counts.

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

app/renderer/shared/ui/globals.css

@@ -44,11 +44,23 @@ a {
 
 button,
 input,
-textarea {
+textarea,
+select {
   font: inherit;
   color: inherit;
 }
 
+/* Кастомная стрелка select: 8px от правого края (нативные часто вплотную). */
+select {
+  appearance: none;
+  -webkit-appearance: none;
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.25L6 7.75L9.5 4.25' stroke='rgba(255,255,255,0.72)' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
+  background-repeat: no-repeat;
+  background-position: right 8px center;
+  background-size: 12px 12px;
+  padding-right: 28px;
+}
+
 ::selection {
   background: var(--selection-bg);
 }