feat(traps): activation VFX/SFX, explosion effect, and help section

Wire mimic/pit/arrow/laser media on activate, poison/explosion via effects, and document the scene editor and traps in Instructions.

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

app/renderer/shared/traps/TrapGlyph.tsx

@@ -1,6 +1,6 @@
 /** Простые SVG-иконки ловушек (MVP). */
 
-import type { SceneTrapStatus, SceneTrapType } from '../../shared/types';
+import type { SceneTrapStatus, SceneTrapType } from '../../../shared/types';
 
 const TYPE_COLOR: Record<SceneTrapType, string> = {
   mimic: '#c4783a',