Integration: explicit one-way send to Sonarr/Radarr

[abhichandra21]

Summary

Add an explicit one-way action to send a recommended title to Sonarr (TV) or Radarr (movies).

This is a convenience handoff from Streamline after the user has decided they want something. Streamline should not become a control plane for external download automation.

Product fit

This fits the app philosophy if it stays narrow:

• Streamline helps the user discover what to watch.
• The user explicitly decides to send a title elsewhere.
• Sonarr/Radarr handle monitoring and download behavior after the handoff.
• Streamline does not manage or sync external library state.

Scope

• Add a Send to Sonarr/Radarr action on recommendation cards
• Detect content type and route to the correct service
• Send the title by TMDB ID using the Sonarr/Radarr v3 API
• Require explicit configuration for each service URL and API key
• Show a clear success, duplicate, or failure result in the UI

Expected behavior

• TV recommendations go to Sonarr
• Movie recommendations go to Radarr
• If the title already exists or is already monitored, show that clearly
• The action is manual and one-shot
• Streamline records that the handoff was attempted so the user can see what was already sent

Out of scope

Do not turn this into ongoing orchestration.

Out of scope:

• syncing monitored or downloaded state back into Streamline
• managing queue, quality upgrades, or release selection
• background polling of Sonarr/Radarr state
• bulk automation rules
• using Streamline as a download dashboard
• generalized media-manager integration framework

Configuration

Use explicit local configuration for:

• Sonarr base URL and API key
• Radarr base URL and API key
• optional default root folder and quality profile if required for a successful add

Keep the fallback path simple: if configuration is missing, the UI should explain that the integration is not configured instead of hiding the action behind partial automation.

Acceptance criteria

• A movie recommendation can be sent to Radarr from the UI
• A TV recommendation can be sent to Sonarr from the UI
• Duplicate or already-present titles are handled cleanly
• Missing integration config produces a clear, recoverable error
• The feature remains a one-way manual handoff and does not introduce background sync or control-plane behavior