feat(providers): add trae/windsurf/zed/workbuddy/codebuddy-intl + icons

- New providers: trae, windsurf, zed, workbuddy, codebuddy-intl
  (registry + executor, wired into executors/index.js + registry/index.js)
- zed: port hosted cloud proxy from OmniRoute — RSA access-token → short-lived
  LLM token exchange (shared/zedAuth.js) + NDJSON {event}/{status}/[DONE]
  stream translated back to OpenAI via Claude/Gemini/OpenAI-Responses translators
- Provider icons (128x128 png) for the 5 new providers
- qoder + tokenRefresh provider tweaks

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

open-sse/executors/trae.js

@@ -0,0 +1,22 @@
+import { DefaultExecutor } from "./default.js";
+
+// Trae executor — inject x-cloudide-token (raw access token) + Authorization Bearer.
+// Mirrors trae_account.rs request_trae_json header set.
+export default class TraeExecutor extends DefaultExecutor {
+  constructor() {
+    super("trae");
+  }
+
+  buildHeaders(credentials, stream = true) {
+    const headers = super.buildHeaders(credentials, stream);
+    const token = credentials?.accessToken;
+    if (token) {
+      // Raw token (no Bearer prefix) on x-cloudide-token — matches official client.
+      headers["x-cloudide-token"] = token;
+      headers["Authorization"] = `Bearer ${token}`;
+    }
+    return headers;
+  }
+
+  // TODO verify: if Chat is JSON-RPC shaped, override transformRequest here.
+}