feat(provider): add MiMo Free no-auth provider

Bootstrap → JWT → chat flow with auto-retry. Inject the MiMoCode
system marker required to pass the upstream 403 anti-abuse gate,
derive JWT expiry from the exp claim, and use a stable per-machine
fingerprint as the bootstrap client.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/providers/suggested-models/filters.js

@@ -17,4 +17,10 @@ export const FILTERS = {
     models
       .filter((m) => m.id?.endsWith("-free") || KNOWN_FREE_OPENCODE_MODELS.includes(m.id))
       .map((m) => ({ id: m.id, name: m.id })),
+
+  // models.dev returns a large catalog; keep only mimo models
+  "mimo-free": (models) =>
+    (Array.isArray(models) ? models : [])
+      .filter((m) => m.id?.startsWith("mimo") || m.name?.toLowerCase().includes("mimo"))
+      .map((m) => ({ id: m.id, name: m.name || m.id })),
 };