Add movie to collection
**What:** Owner-only. Add a movie by TMDB id (idempotent: re-adding is a no-op). Hydrates the movie cache + filter facets from TMDB.
**Auth:** Bearer token required.
**Path params:** `id` (collection ObjectId).
**Body (JSON):**
| Field | Type | Required | Description | Example |
|---|---|---|---|---|
| tmdbId | integer | yes | Numeric TMDB movie id (> 0). | `27205` |
**Returns:** `data = full` (the updated collection + movies).
Authentication
AuthorizationBearer
Bearer authentication of the form Bearer <token>, where token is your auth token.
Path parameters
{collectionId
Request
This endpoint expects an object.
tmdbId
Response
OK
ok
data
Errors
400
Bad Request Error
404
Not Found Error

