feat(skills): add openwebui-community-publisher skill

.gemini/skills/openwebui-community-publisher/SKILL.md

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+---
+name: openwebui-community-publisher
+description: Automatically publishes plugin update posts to openwebui.com. 
+---
+
+# OpenWebUI Community Publisher
+
+## Overview
+
+This skill automates the process of publishing plugin release notes and announcements directly to the OpenWebUI Community (openwebui.com).
+
+## Prerequisites
+
+- User must be logged into [openwebui.com](https://openwebui.com) in the browser session.
+- The content must be prepared in Markdown format (typically following the structure of the plugin's changelog or a dedicated release `.md` file).
+
+## Execution Workflow
+
+### 1. Verification
+
+- Use `browser_subagent` to navigate to `https://openwebui.com`.
+- Verify the logged-in user status (look for profile icons or "@Fu-Jie").
+
+### 2. Post Creation
+
+- Navigate to `https://openwebui.com/post`.
+- **Post Type Selection**:
+  - Choose the appropriate tab based on content:
+    - **Text**: General announcements and documentation.
+    - **Tool**: Standalone tool plugins.
+    - **Function**: Pipes, Filters, or Actions.
+    - **Prompt**: Chat prompt templates.
+    - **Model**: GGUF/Ollama model files.
+  - Unless otherwise specified, default to **Text** for general release introductions.
+- **Community Selection**:
+  - For general OpenWebUI related posts, select **o/openwebui**.
+  - For specialized topics, select the relevant community (e.g., **o/ollama** for models).
+- **Metadata Mapping**:
+  - **Title**: Use the main header from the source file.
+  - **Content/Description**: Paste the Markdown body.
+  - **Source Code (for Function/Pipe)**: If publishing a `Function`, retrieve the corresponding `.py` file content and paste it into the code area.
+- **Tags**: Leave empty by default unless relevant keywords are explicitly provided.
+- **Media**: Optional, only attach if provided.
+- **Settings**: Ensure "Adult content" is unchecked.
+
+### 3. Submission & Validation
+
+- Click the "Create" (创建) button.
+- Wait for redirection to the final post URL.
+- **CRITICAL**: Use `capture_browser_screenshot` to verify the rendering.
+- Return the final URL to the user.
+
+## Design Standards
+
+- **Rich Aesthetics**: Use emojis in titles.
+- **Structured Data**: Ensure tables and code blocks in the Markdown are preserved.
+- **Internal Linking**: Link back to the OpenWebUI market or GitHub repository where applicable.