Enhance NPC creation functionality and validation in Admin module

- Updated AdminController to validate the count parameter, ensuring it is between 1 and 500.
- Refactored NPC creation logic in AdminService to create NPCs for each city-title combination, improving efficiency.
- Enhanced frontend localization files to reflect changes in count descriptions and validation messages.
- Updated CreateNPCView to provide user guidance on count input and display detailed creation results.

frontend/src/views/admin/falukant/CreateNPCView.vue

@@ -47,7 +47,8 @@
 
       <div class="form-group">
         <label>{{ $t('admin.falukant.createNPC.count') }}:</label>
-        <input type="number" v-model.number="count" min="1" max="100" class="form-input" />
+        <input type="number" v-model.number="count" min="1" max="500" class="form-input" />
+        <div class="help-text">{{ $t('admin.falukant.createNPC.countHelp') }}</div>
       </div>
 
       <div class="action-buttons">
@@ -61,6 +62,13 @@
     <div v-if="result" class="result-section">
       <h2>{{ $t('admin.falukant.createNPC.result') }}</h2>
       <p>{{ $t('admin.falukant.createNPC.createdCount', { count: result.count }) }}</p>
+      <p v-if="result.totalCombinations" class="info-text">
+        {{ $t('admin.falukant.createNPC.combinationInfo', { 
+          perCombination: result.countPerCombination, 
+          combinations: result.totalCombinations,
+          total: result.count
+        }) }}
+      </p>
       <div v-if="result.npcs && result.npcs.length > 0" class="npcs-list">
         <div v-for="npc in result.npcs" :key="npc.id" class="npc-item">
           {{ $t(`falukant.titles.${npc.gender}.${npc.title}`) }} {{ npc.firstName }} {{ npc.lastName }} 
@@ -142,7 +150,7 @@ export default {
         return;
       }
       
-      if (this.count < 1 || this.count > 100) {
+      if (this.count < 1 || this.count > 500) {
         this.error = this.$t('admin.falukant.createNPC.invalidCount');
         return;
       }
@@ -286,4 +294,17 @@ export default {
   border-radius: 4px;
   margin-top: 20px;
 }
+
+.help-text {
+  font-size: 0.9em;
+  color: #666;
+  margin-top: 5px;
+  font-style: italic;
+}
+
+.info-text {
+  font-size: 0.9em;
+  color: #155724;
+  margin-top: 5px;
+}
 </style>