feat: add STT support, Gemini TTS, and expand usage tracking

- Speech-to-Text: full pipeline with sttCore handler, /v1/audio/transcriptions
  endpoint, sttConfig for OpenAI, Gemini, Groq, Deepgram, AssemblyAI,
  HuggingFace, NVIDIA Parakeet; new 9router-stt skill
- Gemini TTS: add gemini provider with 30 prebuilt voices and TTS_PROVIDER_CONFIG
- Usage: implement GLM (intl/cn) and MiniMax (intl/cn) quota fetchers; refactor
  Gemini CLI usage to use retrieveUserQuota with per-model buckets
- Disabled models: lowdb-backed disabledModelsDb + /api/models/disabled route
- Header search: reusable Zustand store (headerSearchStore) wired into Header
- CLI tools: add Claude Cowork tool card and cowork-settings API
- Providers: introduce mediaPriority sorting in getProvidersByKind, add
  Kimi K2.6, reorder hermes, drop qwen STT kind
- UI: expand media-providers/[kind]/[id] page (+314), enhance OAuthModal,
  ModelSelectModal, ProviderTopology, ProxyPools, ProviderLimits
- Assets: refresh provider PNGs (alicode, byteplus, cloudflare-ai, nvidia,
  ollama, vertex, volcengine-ark) and add aws-polly, fal-ai, jina-ai, recraft,
  runwayml, stability-ai, topaz, black-forest-labs

src/app/(dashboard)/dashboard/providers/[id]/AddCustomModelModal.js

@@ -15,15 +15,22 @@ export default function AddCustomModelModal({ isOpen, providerAlias, providerDis
     if (isOpen) { setModelId(""); setTestStatus(null); setTestError(""); }
   }, [isOpen]);
 
+  // Strip provider's own alias prefix (e.g. "cc/model" -> "model" for cc provider)
+  const stripAlias = (id) => {
+    const prefix = `${providerAlias}/`;
+    return id.startsWith(prefix) ? id.slice(prefix.length) : id;
+  };
+
   const handleTest = async () => {
-    if (!modelId.trim()) return;
+    const cleanId = stripAlias(modelId.trim());
+    if (!cleanId) return;
     setTestStatus("testing");
     setTestError("");
     try {
       const res = await fetch("/api/models/test", {
         method: "POST",
         headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ model: `${providerAlias}/${modelId.trim()}` }),
+        body: JSON.stringify({ model: `${providerAlias}/${cleanId}` }),
       });
       const data = await res.json();
       setTestStatus(data.ok ? "ok" : "error");
@@ -35,10 +42,11 @@ export default function AddCustomModelModal({ isOpen, providerAlias, providerDis
   };
 
   const handleSave = async () => {
-    if (!modelId.trim() || saving) return;
+    const cleanId = stripAlias(modelId.trim());
+    if (!cleanId || saving) return;
     setSaving(true);
     try {
-      await onSave(modelId.trim());
+      await onSave(cleanId);
     } finally {
       setSaving(false);
     }
@@ -74,7 +82,7 @@ export default function AddCustomModelModal({ isOpen, providerAlias, providerDis
             </Button>
           </div>
           <p className="text-xs text-text-muted mt-1">
-            Sent to provider as: <code className="font-mono bg-sidebar px-1 rounded">{modelId.trim() || "model-id"}</code>
+            Sent to provider as: <code className="font-mono bg-sidebar px-1 rounded">{stripAlias(modelId.trim()) || "model-id"}</code>
           </p>
         </div>