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/store/headerSearchStore.js

@@ -0,0 +1,19 @@
+/**
+ * Header Search Store — Zustand-based reusable search input in Header.
+ * Pages register placeholder on mount, read query, unregister on unmount.
+ */
+
+import { create } from "zustand";
+
+export const useHeaderSearchStore = create((set) => ({
+  query: "",
+  placeholder: "",
+  visible: false,
+
+  setQuery: (query) => set({ query }),
+
+  register: (placeholder = "Search...") =>
+    set({ visible: true, placeholder, query: "" }),
+
+  unregister: () => set({ visible: false, placeholder: "", query: "" }),
+}));