chore: update FUN-Codex and FUN-Claude provider models (#522)

FUN-Codex: add GPT models (5.5, 5.4, 5.4-mini, 5.3-codex, 5.3-codex-spark)
FUN-Claude: replace with actual Claude models from API (opus-4-7 down to 3-5-haiku)

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

packages/client/src/components/layout/AppSidebar.vue

@@ -110,6 +110,10 @@ function openChangelog() {
             </svg>
             <span>{{ t("sidebar.search") }}</span>
           </button>
+          <a class="nav-item fun-link" href="https://apikey.fun/register?aff=LIBAPI" target="_blank" rel="noopener noreferrer">
+            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M18 13v6a2 2 0 01-2 2H5a2 2 0 01-2-2V8a2 2 0 012-2h6"/><polyline points="15 3 21 3 21 9"/><line x1="10" y1="14" x2="21" y2="3"/></svg>
+            <span>{{ t('sidebar.apiRelay') }}</span>
+          </a>
         </div>
       </div>
 
@@ -720,4 +724,8 @@ function openChangelog() {
     }
   }
 }
+
+.fun-link {
+  text-decoration: none;
+}
 </style>