feat(library): add source filter to owned games

A row matches when its own source, or the source of a listed
linked edition, is selected. The hidden view ignores the filter.

readme.md

@@ -213,7 +213,7 @@ ArchUnit role rules (`RoleAnnotationRules`) and `src/test/resources/contract/aut
 | `POST` | `/api/rewards/purchases` (`{item}`; `200` wallet, `409 ALREADY_OWNED` / `NOT_ENOUGH_POINTS` / `NOT_FOR_SALE`) | JWT |
 | `GET` | `/api/rewards/progress/{track}/games?page=`, `/api/rewards/history/{kind}/{ref}/games?page=` (the games behind a track or a `MONTH` / `STREAK` bonus; `400 NOT_A_GAME_LIST`) | JWT |
 | `PUT` | `/api/rewards/equipped/{slot}` (`{item}`, null = take off; `200` wallet, `409 NOT_OWNED`, `400 WRONG_SLOT`) | JWT |
-| `GET` | `/api/library/games` (`hideDuplicates=true` leaves out the lesser editions of a linked set), `/api/library/games/{appid}` | JWT |
+| `GET` | `/api/library/games` (`hideDuplicates=true` leaves out the lesser editions of a linked set; `source=STEAM,PSN` keeps rows whose own source or a listed linked edition's source is selected; ignored with `hidden=true`; `400` on an unknown source), `/api/library/games/{appid}` | JWT |
 | `PATCH` | `/api/library/games/{appid}/backlog` (only the sent fields; `null` clears one) | JWT |
 | `PUT`, `DELETE` | `/api/library/games/{appid}/corrections/{field}` (`{value}`; `name`, `image`, `speedrun`, `moods`, `endless`, `genres`, `time_to_beat` = `{normallyMinutes, completelyMinutes}`; `204`, `400 INVALID_CORRECTION`) | JWT, AUDITOR |
 | `GET` | `/api/library/catalog?q=&page=&size=` (every game some user still has, by name part, `PageDto` of `{appid, name, imageUrl, platforms}`; `q` at most 100 characters; size 20, 40 or 80) | JWT, AUDITOR |
@@ -246,7 +246,7 @@ ArchUnit role rules (`RoleAnnotationRules`) and `src/test/resources/contract/aut
 | `GET` | `/api/library/stats?groups=` (`OVERVIEW`, `PILE`, `TOP_GAMES`, `TASTE`, `HABITS`, `FINISHED`, `TREND`, `PLATFORMS`; none = all) | JWT |
 | `GET` | `/api/library/stats/games?key=&arg=&page=` (the games behind a stats number; `400 BAD_ARG`) | JWT |
 | `GET` | `/api/library/achievements/summary` (Steam achievements and PlayStation trophies; one entry per game, platinum = perfect) | JWT |
-| `GET` | `/api/library/sync-status`, `/summary`, `/activity`, `/wishlist`, `/steam-profile`, `/games-count` (`canSync`: a Steam ID or a PlayStation link) | JWT |
+| `GET` | `/api/library/sync-status`, `/summary`, `/activity`, `/wishlist`, `/steam-profile`, `/games-count` (`canSync`: a Steam ID or a PlayStation link; `sources`: the sources of the user's games) | JWT |
 | `GET` | `/api/public/profiles/library` | profile ticket |
 | `GET` | `/api/public/profiles/library/stats/games?key=&arg=&page=` (`403 NOT_SHARED`, `400 BAD_ARG`) | profile ticket |
 | `GET` | `/api/public/profiles/rewards` (`{equipped}`, the worn looks) | profile ticket |