docs: add playlist-browser screenshot to README

- Add playlist-browser.png screenshot and embed it in README
- Update stats-overview.png
- Minor formatting fixes (table alignment, double space)

README.md

@@ -65,6 +65,10 @@ Local stats dashboard — watch time, anime library, vocabulary growth, mining t
 
 Browse sibling episode files and the active mpv queue in one overlay modal. Open it with `Ctrl+Alt+P` to append episodes from the current directory, jump to queued items, remove entries, or reorder the playlist without leaving playback.
 
+<div align="center">
+  <img src="docs-site/public/screenshots/playlist-browser.png" width="800" alt="Stats dashboard showing watch time, cards mined, streaks, and tracking data">
+</div>
+
 <br>
 
 ### Integrations
@@ -107,7 +111,7 @@ Browse sibling episode files and the active mpv queue in one overlay modal. Open
 ## Requirements
 
 |                | Required                                | Recommended                          | Optional                                                                                                        |
-| -------------- | --------------------------------------- | ---------------------------------------- | ----------------------------------------------------------- |
+| -------------- | --------------------------------------- | ------------------------------------ | --------------------------------------------------------------------------------------------------------------- |
 | **Player**     | [`mpv`](https://mpv.io) with IPC socket | —                                    | —                                                                                                               |
 | **Processing** | —                                       | `ffmpeg` (audio clips & screenshots) | `mecab` + `mecab-ipadic` (annotation POS filtering), `guessit` (AniSkip), `alass` / `ffsubsync` (subtitle sync) |
 | **Media**      | —                                       | —                                    | `yt-dlp`, `chafa`, `ffmpegthumbnailer`                                                                          |