docs(readme): update for v3.7.0 release with six major features

Update both English and Chinese README files to reflect the major platform positioning shift and new capabilities:

**Platform Positioning**
- Update tagline: "From Provider Switcher to All-in-One AI CLI Management Platform"
- Emphasize unified management of configurations, MCP, Skills, and Prompts

**v3.7.0 Highlights**
- Gemini CLI Integration: Third supported AI CLI with dual-file config
- Claude Skills Management: GitHub integration, lifecycle management
- Prompts Management: Multi-preset system with Markdown editor
- MCP v3.7.0 Unified Architecture: SSE transport, smart parser, cross-app sync
- Deep Link Protocol: ccswitch:// for one-click config sharing
- Environment Conflict Detection: Auto-detect and resolve config conflicts

**Documentation Updates**
- Add v3.7.0 release notes link
- Expand Quick Start with Skills and Prompts management guides
- Update configuration files section with Gemini environment variables
- Add ShanDianShuo sponsor logos and information

**Technical Details**
- 18,000+ lines of new code across 6 core features
- Cross-app support for Claude Code, Codex, and Gemini CLI
- Complete usage instructions for new management systems

README.md

@@ -12,7 +12,9 @@
 
 English | [中文](README_ZH.md) | [Changelog](CHANGELOG.md)
 
-A desktop application for managing and switching between different provider configurations & MCP for Claude Code and Codex.
+**From Provider Switcher to All-in-One AI CLI Management Platform**
+
+Unified management for Claude Code, Codex & Gemini CLI provider configurations, MCP servers, Skills extensions, and system prompts.
 
 </div>
 
@@ -33,6 +35,12 @@ Get 10% OFF the GLM CODING PLAN with [this link](https://z.ai/subscribe?ic=8JVLJ
 <td width="180"><img src="assets/partners/logos/packycode.png" alt="PackyCode" width="150"></td>
 <td>Thanks to PackyCode for sponsoring this project! PackyCode is a reliable and efficient API relay service provider, offering relay services for Claude Code, Codex, Gemini, and more. PackyCode provides special discounts for our software users: register using <a href="https://www.packyapi.com/register?aff=cc-switch">this link</a> and enter the "cc-switch" promo code during recharge to get 10% off.</td>
 </tr>
+
+<tr>
+<td width="180"><img src="assets/partners/logos/sds-en.png" alt="ShanDianShuo" width="150"></td>
+<td>Thanks to ShanDianShuo for sponsoring this project! ShanDianShuo is a local-first AI voice input: Millisecond latency, data stays on device, 4x faster than typing, AI-powered correction, Privacy-first, completely free. Doubles your coding efficiency with Claude Code! <a href="shandianshuo.cn">Free download</a> for Mac/Win</td>
+</tr>
+
 </table>
 
 ## Screenshots
@@ -43,12 +51,49 @@ Get 10% OFF the GLM CODING PLAN with [this link](https://z.ai/subscribe?ic=8JVLJ
 
 ## Features
 
-### Current Version: v3.7.0 | [Full Changelog](CHANGELOG.md)
+### Current Version: v3.7.0 | [Full Changelog](CHANGELOG.md) | [📋 Release Notes](docs/release-note-v3.7.0-en.md)
+
+**v3.7.0 Major Update (2025-11-19)**
+
+**Six Core Features, 18,000+ Lines of New Code**
+
+- **Gemini CLI Integration**
+  - Third supported AI CLI (Claude Code / Codex / Gemini)
+  - Dual-file configuration support (`.env` + `settings.json`)
+  - Complete MCP server management
+  - Presets: Google Official (OAuth) / PackyCode / Custom
+
+- **Claude Skills Management System**
+  - Auto-scan skills from GitHub repositories (3 pre-configured curated repos)
+  - One-click install/uninstall to `~/.claude/skills/`
+  - Custom repository support + subdirectory scanning
+  - Complete lifecycle management (discover/install/update)
+
+- **Prompts Management System**
+  - Multi-preset system prompt management (unlimited presets, quick switching)
+  - Cross-app support (Claude: `CLAUDE.md` / Codex: `AGENTS.md` / Gemini: `GEMINI.md`)
+  - Markdown editor (CodeMirror 6 + real-time preview)
+  - Smart backfill protection, preserves manual modifications
+
+- **MCP v3.7.0 Unified Architecture**
+  - Single panel manages MCP servers across three applications
+  - New SSE (Server-Sent Events) transport type
+  - Smart JSON parser + Codex TOML format auto-correction
+  - Unified import/export + bidirectional sync
+
+- **Deep Link Protocol**
+  - `ccswitch://` protocol registration (all platforms)
+  - One-click import provider configs via shared links
+  - Security validation + lifecycle integration
+
+- **Environment Variable Conflict Detection**
+  - Auto-detect cross-app configuration conflicts (Claude/Codex/Gemini/MCP)
+  - Visual conflict indicators + resolution suggestions
+  - Override warnings + backup before changes
 
 **Core Capabilities**
 
 - **Provider Management**: One-click switching between Claude Code, Codex, and Gemini API configurations
-- **MCP Integration**: Centralized MCP server management with stdio/http support and real-time sync
 - **Speed Testing**: Measure API endpoint latency with visual quality indicators
 - **Import/Export**: Backup and restore configs with auto-rotation (keep 10 most recent)
 - **i18n Support**: Complete Chinese/English localization (UI, errors, tray)
@@ -61,7 +106,6 @@ Get 10% OFF the GLM CODING PLAN with [this link](https://z.ai/subscribe?ic=8JVLJ
 - Granular model configuration (4-tier: Haiku/Sonnet/Opus/Custom)
 - WSL environment support with auto-sync on directory change
 - 100% hooks test coverage & complete architecture refactoring
-- New presets: DMXAPI, Azure Codex, AnyRouter, AiHubMix, MiniMax
 
 **System Features**
 
@@ -129,9 +173,36 @@ Download the latest `CC-Switch-v{version}-Linux.deb` package or `CC-Switch-v{ver
 ### MCP Management
 
 - **Location**: Click "MCP" button in top-right corner
-- **Add Server**: Use built-in templates (mcp-fetch, mcp-filesystem) or custom config
+- **Add Server**:
+  - Use built-in templates (mcp-fetch, mcp-filesystem, etc.)
+  - Support stdio / http / sse transport types
+  - Configure independent MCP servers for different apps
 - **Enable/Disable**: Toggle switches to control which servers sync to live config
-- **Sync**: Enabled servers auto-sync to `~/.claude.json` (Claude) or `~/.codex/config.toml` (Codex)
+- **Sync**: Enabled servers auto-sync to each app's live files
+- **Import/Export**: Import existing MCP servers from Claude/Codex/Gemini config files
+
+### Skills Management (v3.7.0 New)
+
+- **Location**: Click "Skills" button in top-right corner
+- **Discover Skills**:
+  - Auto-scan pre-configured GitHub repositories (Anthropic official, ComposioHQ, community, etc.)
+  - Add custom repositories (supports subdirectory scanning)
+- **Install Skills**: Click "Install" to one-click install to `~/.claude/skills/`
+- **Uninstall Skills**: Click "Uninstall" to safely remove and clean up state
+- **Manage Repositories**: Add/remove custom GitHub repositories
+
+### Prompts Management (v3.7.0 New)
+
+- **Location**: Click "Prompts" button in top-right corner
+- **Create Presets**:
+  - Create unlimited system prompt presets
+  - Use Markdown editor to write prompts (syntax highlighting + real-time preview)
+- **Switch Presets**: Select preset → Click "Activate" to apply immediately
+- **Sync Mechanism**:
+  - Claude: `~/.claude/CLAUDE.md`
+  - Codex: `~/.codex/AGENTS.md`
+  - Gemini: `~/.gemini/GEMINI.md`
+- **Protection Mechanism**: Auto-save current prompt content before switching, preserves manual modifications
 
 ### Configuration Files
 
@@ -149,13 +220,15 @@ Download the latest `CC-Switch-v{version}-Linux.deb` package or `CC-Switch-v{ver
 
 **Gemini**
 
-- Live config: `~/.gemini/.env` (API key) + `~/.gemini/settings.json` (auth type for quick switching)
-- API key field: `GEMINI_API_KEY` inside `.env`
-- Tray quick switch: each provider switch rewrites `~/.gemini/.env` so the Gemini CLI picks up the new credentials immediately
+- Live config: `~/.gemini/.env` (API key) + `~/.gemini/settings.json` (auth mode)
+- API key field: `GEMINI_API_KEY` or `GOOGLE_GEMINI_API_KEY` in `.env`
+- Environment variables: Support `GOOGLE_GEMINI_BASE_URL`, `GEMINI_MODEL`, etc.
+- MCP servers: `~/.gemini/settings.json` → `mcpServers`
+- Tray quick switch: Each provider switch rewrites `~/.gemini/.env`, no need to restart Gemini CLI
 
 **CC Switch Storage**
 
-- Main config (SSOT): `~/.cc-switch/config.json`
+- Main config (SSOT): `~/.cc-switch/config.json` (includes providers, MCP, Prompts presets, etc.)
 - Settings: `~/.cc-switch/settings.json`
 - Backups: `~/.cc-switch/backups/` (auto-rotate, keep 10)