fix(ui): stable React list keys on Now Playing cards (#703)

* fix(ui): use stable list keys on Now Playing dashboard cards

Subsonic payloads can repeat the same id in similar artists, album
track rows, and top songs. Keys now combine id with list index so
React reconciliation stays stable and duplicate-key warnings stop.

* docs: changelog and credits for Now Playing list keys (PR #703)

Document the dashboard list key fix in CHANGELOG and Settings contributors.

CHANGELOG.md

@@ -289,6 +289,12 @@ Foundational work: faster reviews, narrower diffs, and a safety net under the pa
 
 * **Add Station** / **Edit** now mount **`RadioEditModal`** with **`createPortal(..., document.body)`** (same layering approach as **Search Directory**). Previously the overlay lived under nested **`.content-body`** with **`contain: paint`**, so on an **empty** station list the fixed overlay was **painted inside a short box** and looked cropped; after the first station the layout was tall enough that the bug was easy to miss.
 
+### Now Playing — stable list keys on dashboard cards (duplicate React `key` warnings)
+
+**By [@cucadmuh](https://github.com/cucadmuh), PR [#703](https://github.com/Psychotoxical/psysonic/pull/703)**
+
+* **Similar artists**, the **track list inside the in-player album card**, and **Top songs** can all include **more than one row with the same Subsonic `id`** (server payloads are not always strictly deduped). Those lists used **`key={id}`**, which triggered **duplicate `key`** warnings in React devtools and made reconciliation depend on row order. Keys now combine **`id` with the list index** — rendering only; **no queue or playback change**.
+
 ### Search — hide duplicate artist hits with zero albums
 
 **By [@cucadmuh](https://github.com/cucadmuh), thanks to zunoz for the report on the Psysonic Discord, PR [#697](https://github.com/Psychotoxical/psysonic/pull/697)**