docs(readme): refresh plugin badge layout and mirrors

- update plugin README badge rows and mirrored docs
- sync README template and scaffolder guidance

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/instructions/plugin-documentation.instructions.md

@@ -0,0 +1,90 @@
+---
+name: Plugin Documentation
+description: Use when writing or updating plugin README files, mirrored docs pages, bilingual release notes, or other user-facing documentation for plugins.
+applyTo: "plugins/**/README*.md"
+---
+# Plugin Documentation Standards
+
+## Delivery Language
+
+- Plugin directories must keep both `README.md` and `README_CN.md`
+- When a task includes docs, guides, announcements, release notes, or development docs, prepare both English and Chinese versions for review unless the user explicitly asks for single-language delivery
+- Even if only English is committed, provide a Chinese review draft in the conversation when documentation is part of the work
+
+## README Structure
+
+Use this order for plugin READMEs:
+
+1. Title with icon
+2. README header
+3. One-sentence description
+4. `What's New` with only the latest update
+5. `Key Features`
+6. `How to Use`
+7. Configuration or Valves table
+8. Support section
+9. Other sections such as examples, template notes, troubleshooting, or changelog link
+
+## README Header
+
+Do not use the old pipe-separated metadata line.
+
+Use a compact two-part header:
+
+1. A full-width two-column line with author/version on the left and the star link on the right
+2. A single-row live badge table with no visible text header
+
+English example:
+
+`| By [Fu-Jie](https://github.com/Fu-Jie) · vx.y.z | [⭐ Star this repo](https://github.com/Fu-Jie/openwebui-extensions) |`
+
+`| :--- | ---: |`
+
+`| ![followers](...) | ![points](...) | ![top](...) | ![contributions](...) | ![views](...) | ![downloads](...) | ![saves](...) |`
+
+`| :---: | :---: | :---: | :---: | :---: | :---: | :---: |`
+
+Chinese example:
+
+`| 作者：[Fu-Jie](https://github.com/Fu-Jie) · vx.y.z | [⭐ 点个 Star 支持项目](https://github.com/Fu-Jie/openwebui-extensions) |`
+
+`| :--- | ---: |`
+
+`| ![followers](...) | ![points](...) | ![top](...) | ![contributions](...) | ![views](...) | ![downloads](...) | ![saves](...) |`
+
+`| :---: | :---: | :---: | :---: | :---: | :---: | :---: |`
+
+Guidelines:
+
+- Keep the author link pointing to `https://github.com/Fu-Jie`
+- Keep the star link pointing to the repository root
+- Put the version on the left-side author line as plain text (`vx.y.z`), not as a badge
+- Use live badges for followers, points, plugin contribution count, total plugin views, total plugin downloads, and total plugin saves
+- Keep the `Top` badge compact; use the current project standard for its source
+- Do not add a visible label header row above the badges
+
+## Support Section
+
+Use the repository-standard support wording.
+
+English:
+`If this plugin has been useful, a star on [OpenWebUI Extensions](https://github.com/Fu-Jie/openwebui-extensions) is a big motivation for me. Thank you for the support.`
+
+Chinese:
+`如果这个插件对你有帮助，欢迎到 [OpenWebUI Extensions](https://github.com/Fu-Jie/openwebui-extensions) 点个 Star，这将是我持续改进的动力，感谢支持。`
+
+## Mirror and Sync Rules
+
+When plugin documentation changes, keep these layers aligned as needed:
+
+- Plugin-local README files under `plugins/`
+- Mirrored docs pages under `docs/plugins/`
+- Plugin index pages under `docs/plugins/<type>/index.md` and `index.zh.md`
+- Root `README.md` and `README_CN.md` date badge when preparing a release
+
+Use the `doc-mirror-sync` skill when the task includes mirroring plugin READMEs into `docs/`.
+
+## Changelog Handling
+
+- Keep detailed changelog history in GitHub release history or dedicated docs
+- In README files, keep `What's New` focused on the latest version only