docs: reconcile docs-site with current config schema and defaults

- sidebar: migrate flat props to css object (font-family, color, bg, custom vars)
- frequencyDictionary.topX default: 1000 → 10000
- text-shadow default: updated to outline-style multi-shadow
- anki: reset ai model/prompt, imageMaxWidth/Height, animatedMaxHeight to 0; isLapis defaults
- troubleshooting: log default warn (not info), css["font-size"] usage
- shortcuts: add W markWatchedKey; clarify keybindings vs built-in overlay actions
- websocket: clarify all services off by default, fix enabled semantics
- usage: --anilist → --anilist-setup
- AGENTS.md: add Docs Upkeep trigger map, clarify CLAUDE.md symlink, expand PR notes

docs-site/usage.md

@@ -116,7 +116,7 @@ subminer dictionary --candidates /path/to/file.mkv
 subminer dictionary --select 21355 /path/to/file.mkv
 subminer texthooker               # Launch texthooker-only mode
 subminer texthooker -o            # Launch texthooker and open it in your browser
-subminer app --anilist            # Pass args directly to SubMiner binary (example: AniList login flow)
+subminer app --anilist-setup      # Pass args directly to SubMiner binary (example: AniList login flow)
 
 # Direct packaged app control
 SubMiner.AppImage --background             # Start in background (tray + IPC wait, minimal logs)