feat(new tool): GPT Token Encoder/Decoder

Fix CorentinTh#1109, CorentinTh#1334

Author: sharevb

src/tools/gpt-token-encoder/index.ts

@@ -0,0 +1,13 @@
+import { FileText } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'GPT Token Encoder/Decoder',
+  path: '/gpt-token-encoder',
+  description: 'Encode text to GPT tokens and decode GPT tokens back to text',
+  keywords: ['gpt', 'llm', 'openai', 'token', 'encode', 'decode'],
+  component: () => import('./gpt-token-encoder.vue'),
+  icon: FileText,
+  createdAt: new Date('2025-08-15'),
+  category: 'Text',
+});

src/tools/gpt-token-estimator/gpt-token-estimator.vue

@@ -3,7 +3,6 @@ import { useI18n } from 'vue-i18n';
 import JSON5 from 'json5';
 import type { TiktokenModel } from 'js-tiktoken';
 import { GPTTokens } from './gpt-tokens.service';
-import TextareaCopyable from '@/components/TextareaCopyable.vue';
 import { useValidation } from '@/composable/validation';
 import { useQueryParamOrStorage } from '@/composable/queryParams';
 
@@ -162,6 +161,12 @@ const outputTokenCosts = computed(() => {
       <n-form-item :label="t('tools.gpt-token-estimator.texts.label-completion-tokens')" label-placement="left">
         <InputCopyable :value="outputTokenCosts.completionUsedTokens" />
       </n-form-item>
+
+      <n-p mt-3>
+        <n-a href="https://platform.openai.com/docs/pricing" target="_blank">
+          See OpenAPI Pricings
+        </n-a>
+      </n-p>
     </div>
   </div>
 </template>