fix(frontend): rename GImage display label to G31FI for gemini-3.1-flash-image model

frontend/src/components/account/AccountStatusIndicator.vue

@@ -182,7 +182,7 @@ const formatScopeName = (scope: string): string => {
     'gemini-3.1-pro-high': 'G3PH',
     'gemini-3.1-pro-low': 'G3PL',
     'gemini-3-pro-image': 'G3PI',
-    'gemini-3.1-flash-image': 'GImage',
+    'gemini-3.1-flash-image': 'G31FI',
     // 其他
     'gpt-oss-120b-medium': 'GPT120',
     'tab_flash_lite_preview': 'TabFL',

frontend/src/i18n/locales/en.ts

@@ -2534,7 +2534,7 @@ export default {
         geminiFlashDaily: 'Flash',
         gemini3Pro: 'G3P',
         gemini3Flash: 'G3F',
-        gemini3Image: 'GImage',
+        gemini3Image: 'G31FI',
         claude: 'Claude'
       },
       tier: {

frontend/src/i18n/locales/zh.ts

@@ -1963,7 +1963,7 @@ export default {
         geminiFlashDaily: 'Flash',
         gemini3Pro: 'G3P',
         gemini3Flash: 'G3F',
-        gemini3Image: 'GImage',
+        gemini3Image: 'G31FI',
         claude: 'Claude'
       },
       tier: {