feat(ui): 공용 호버 정보 양식 · B09 칸 풍선을 새 호버로(185-3)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01STqEqztUthVFBmEP18wBSz

ui_template/ui_template_hover_info.css

@@ -0,0 +1,25 @@
+/* =============================================================================
+ * 호버 정보 상자 공용 모양(`ui_template_hover_info.ts` · PLAN 185-3) — 화면에 하나 · fixed ·
+ * 색 = 테마 토큰(밝음 · 어두움 같이) · 마우스를 안 막음
+ * ========================================================================== */
+
+.ui-hover-info {
+  position: fixed;
+  z-index: var(--z-toast);
+  max-width: min(320px, calc(100vw - 12px));
+  padding: var(--spacing-4) var(--spacing-8);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  background: var(--color-surface-raised);
+  box-shadow: var(--shadow-sm);
+  color: var(--color-text-body);
+  font-size: 12px;
+  line-height: 1.4;
+  white-space: pre-line;
+  overflow-wrap: anywhere;
+  pointer-events: none;
+}
+
+.ui-hover-info[hidden] {
+  display: none;
+}