docs(site): [SITE-04] document Iframe and Thumbnail tools

packages/artplayer-vitepress/README.md

@@ -26,6 +26,8 @@ not a VitePress page. Keep both URL surfaces compatible.
 | `docs/plugin/jassub.md`, `docs/en/plugin/jassub.md` | Worker resources, ASS queries, actual method signatures, ownership and compatible declarations | `/document/plugin/jassub.html`, `/document/en/plugin/jassub.html` |
 | `docs/plugin/danmuku-mask.md`, `docs/en/plugin/danmuku-mask.md` | Segmentation configuration, start/stop, mask ownership and preserved type shape | `/document/plugin/danmuku-mask.html`, `/document/en/plugin/danmuku-mask.html` |
 | `docs/plugin/chromecast.md`, `docs/en/plugin/chromecast.md` | SDK loading, callbacks, shared sessions, receiver limitations and runtime types | `/document/plugin/chromecast.html`, `/document/en/plugin/chromecast.html` |
+| `docs/tool/iframe.md`, `docs/en/tool/iframe.md` | Parent/child setup, serialized requests, navigation cancellation, trust and type views | `/document/tool/iframe.html`, `/document/en/tool/iframe.html` |
+| `docs/tool/thumbnail.md`, `docs/en/tool/thumbnail.md` | Local file extraction, approved defaults, PNG sheets, events and URL ownership | `/document/tool/thumbnail.html`, `/document/en/tool/thumbnail.html` |
 | `docs/.vitepress/config.js` | Navigation, base URL, output path, page head | Repository `docs/document/` |
 | `docs/vite.config.ts` | Search plugin configuration | VitePress/Vite integration; real search acceptance remains pending |
 | `docs/public/main.js` | Run Code links and first-visit language redirect | Copied into the built site |
@@ -39,12 +41,20 @@ and run `node refactor/scripts/demos.mjs --check`. Preserve the frozen BASE-04
 inventory. Also refresh and check the current site inventory; the two inventories
 serve different purposes. Neither path check replaces browser navigation tests.
 
-The generated site lives in `docs/document/`. The current inventory contains 58 Markdown pages: 29 Chinese
-and 29 English. All 16 plugins have dedicated guides and navigation in both languages.
-The two proxies and two tools still need dedicated bilingual guides. Core member
+The generated site lives in `docs/document/`. The current inventory contains 62 Markdown pages: 31 Chinese
+and 31 English. All 16 plugins and both tools have dedicated guides and navigation in both languages.
+The two proxies still need dedicated bilingual guides. Core member
 mapping and the current cross-check of earlier guides remain in SITE-04;
 navigation links alone are not complete API documentation.
 
+Tools have their own navigation group. Iframe explains the required child inject
+step and serialized commit body, without treating the protocol as a sandbox or
+promising legacy document identity. Thumbnail explains published fixed-height
+defaults, explicit workspace mode, synchronous failures, density limits and owned
+Blob URLs. Original examples are retained; their navigation is not extraction or
+cross-window player acceptance. The thumbnail package's stale default-behavior
+sentence was corrected alongside these guides, requiring its candidate refresh.
+
 JASSUB documents actual resize argument order, query callbacks and resource
 ownership separately from preserved historical declarations. Danmuku Mask keeps
 both plugin dependencies in its Run Code link and explains initialization versus