fix(cline): stop workos:-prefixing ClinePass API keys and add clinepass token refresh

Cline/ClinePass requests failed with HTTP 401 ("Please make sure you are using
the latest version of Cline and re-authenticate your Cline account", #3230 /
#2333 / #3644). `getClineAccessToken()` unconditionally prefixed every token
with `workos:`, which is correct for Cline OAuth access tokens (WorkOS JWTs)
but wrong for ClinePass API keys — those are opaque strings (e.g. `clp_…`)
that the API accepts only verbatim, so the `workos:`-prefixed value was
rejected.

Only prefix tokens that look like a WorkOS JWT (`eyJ…`); API keys and other
opaque tokens pass through untouched, and an existing `workos:` prefix is
never doubled.

Also register `clinepass` in the token-refresh handlers. ClinePass shares
Cline's WorkOS auth endpoints, but without the entry expired ClinePass OAuth
tokens were never rotated, so every request kept 401ing. Finally, list
`apikey` first in the ClinePass `authModes` (ClinePass is meant to be used
with an API key from app.cline.bot/settings/api-keys), and add an "Import
from /models" button that pulls the live Cline catalog into custom models.

open-sse/providers/registry/clinepass.js

@@ -14,7 +14,10 @@ export default {
     },
   },
   category: "oauth",
-  authModes: ["oauth", "apikey"],
+  // ClinePass authenticates with a plain API key from app.cline.bot/settings/api-keys
+  // (category "apikey"). The OAuth extension flow used by Cline does not issue
+  // tokens that the ClinePass API consumer endpoint accepts (HTTP 401) — see #2333.
+  authModes: ["apikey", "oauth"],
   hasOAuth: true,
   transport: {
     baseUrl: "https://api.cline.bot/api/v1/chat/completions",