Bug Description

The gateway /model picker (Discord/Telegram) only uses the static model-catalog.json curated list for the Nous Portal provider. It does NOT call the Portal API's freeRecommendedModels endpoint to dynamically discover newly-launched free models (e.g. DeepSeek V4 Flash via Novita Labs promotion, announced May 14).

The interactive hermes model CLI flow does call this endpoint (via auth.py union_with_portal_free_recommendations), so models like deepseek-v4-flash appear in the terminal picker but NOT in the Discord/Telegram picker.

Steps to Reproduce

1. Authenticate with Nous Portal (hermes login nous) on a free tier subscription
2. Send /model via Discord or Telegram gateway
3. Look for recently-launched free models in the Nous Portal section
4. DeepSeek V4 Flash (free on Nous Portal via Novita Labs since May 14) does not appear
5. Same model DOES appear when running hermes model interactively in terminal

Expected Behavior

The gateway /model picker should show the same models as the interactive hermes model CLI, including dynamically-recommended models from the Portal API.

Actual Behavior

Only models from the static model-catalog.json manifest are shown. The static catalog was last updated May 11, 3 days before the DeepSeek Flash promotion was announced.

Root Cause

• Gateway path: _handle_model_command → list_picker_providers → list_authenticated_providers → get_curated_nous_model_ids → reads static model-catalog.json or _PROVIDER_MODELS["nous"]
• CLI path: auth.py handle_nous_auth → union_with_portal_free_recommendations → fetches dynamic freeRecommendedModels from Portal API → merges with curated list
• The gap: list_authenticated_providers (called by the gateway) never calls union_with_portal_free_recommendations or union_with_portal_paid_recommendations for the nous provider

Affected Code

• gateway/run.py — _handle_model_command
• hermes_cli/model_switch.py — list_picker_providers, list_authenticated_providers
• hermes_cli/models.py — get_curated_nous_model_ids
• hermes_cli/auth.py — dynamic recommendations logic

Environment

• Hermes Agent v0.14.0 (2026.5.16)
• Discord gateway connected
• Nous Portal authenticated (OAuth device_code, free tier)
• config.yaml model_catalog.enabled: true

Proposed Fix

In list_authenticated_providers (or a helper called by it), when building the model list for the nous provider, also call union_with_portal_free_recommendations (for free tier) or union_with_portal_paid_recommendations (for paid users) and merge the results with the curated list — same as the CLI handle_nous_auth does.