refactor(model): SpellBook을 SkillBook으로 리네이밍

- 게임 컨셉에 맞게 주문서 → 스킬북 용어 통일
- 관련 모든 참조 일괄 변경

lib/src/features/hall_of_fame/hall_of_fame_screen.dart

@@ -516,12 +516,12 @@ class _HallOfFameDetailDialog extends StatelessWidget {
                 ),
                 const SizedBox(height: 16),
               ],
-              // 스펠 섹션 (Spells Section)
-              if (entry.finalSpells != null && entry.finalSpells!.isNotEmpty)
+              // 스킬 섹션 (Skills Section)
+              if (entry.finalSkills != null && entry.finalSkills!.isNotEmpty)
                 _buildSection(
                   icon: Icons.auto_fix_high,
                   title: l10n.hofSpells,
-                  child: _buildSpellList(context),
+                  child: _buildSkillList(context),
                 ),
             ],
           ),
@@ -983,15 +983,15 @@ class _HallOfFameDetailDialog extends StatelessWidget {
     return widgets;
   }
 
-  Widget _buildSpellList(BuildContext context) {
-    final spells = entry.finalSpells!;
+  Widget _buildSkillList(BuildContext context) {
+    final skills = entry.finalSkills!;
     return Wrap(
       spacing: 8,
       runSpacing: 4,
-      children: spells.map((spell) {
-        final name = spell['name'] ?? '';
-        final rank = spell['rank'] ?? '';
-        // 스펠 이름 번역 적용
+      children: skills.map((skill) {
+        final name = skill['name'] ?? '';
+        final rank = skill['rank'] ?? '';
+        // 스킬 이름 번역 적용
         final translatedName = GameDataL10n.getSpellName(context, name);
         return Container(
           padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),