Feat/claude skills management (#237)

* feat(skills): add Claude Skills management feature

Implement complete Skills management system with repository discovery,
installation, and lifecycle management capabilities.

Backend:
- Add SkillService with GitHub integration and installation logic
- Implement skill commands (list, install, uninstall, check updates)
- Support multiple skill repositories with caching

Frontend:
- Add Skills management page with repository browser
- Create SkillCard and RepoManager components
- Add badge, card, table UI components
- Integrate Skills API with Tauri commands

Files: 10 files changed, 1488 insertions(+)

* feat(skills): integrate Skills feature into application

Integrate Skills management feature with complete dependency updates,
configuration structure extensions, and internationalization support.

Dependencies:
- Add @radix-ui/react-visually-hidden for accessibility
- Add anyhow, zip, serde_yaml, tempfile for Skills backend
- Enable chrono serde feature for timestamp serialization

Backend Integration:
- Extend MultiAppConfig with SkillStore field
- Implement skills.json migration from legacy location
- Register SkillService and skill commands in main app
- Export skill module in commands and services

Frontend Integration:
- Add Skills page route and dialog in App
- Integrate Skills UI with main navigation

Internationalization:
- Add complete Chinese translations for Skills UI
- Add complete English translations for Skills UI

Code Quality:
- Remove redundant blank lines in gemini_mcp.rs
- Format log statements in mcp.rs

Tests:
- Update import_export_sync tests for SkillStore
- Update mcp_commands tests for new structure

Files: 16 files changed, 540 insertions(+), 39 deletions(-)

* style(skills): improve SkillsPage typography and spacing

Optimize visual hierarchy and readability of Skills page:
- Reduce title size from 2xl to lg with tighter tracking
- Improve description spacing and color contrast
- Enhance empty state with better text hierarchy
- Use explicit gray colors for better dark mode support

* feat(skills): support custom subdirectory path for skill scanning

Add optional skillsPath field to SkillRepo to enable scanning skills
from subdirectories (e.g., "skills/") instead of repository root.

Changes:
- Backend: Add skillsPath field with subdirectory scanning logic
- Frontend: Add skillsPath input field and display in repo list
- Presets: Add cexll/myclaude repo with skills/ subdirectory
- Code quality: Fix clippy warnings (dedup logic, string formatting)

Backward compatible: skillsPath is optional, defaults to root scanning.

* refactor(skills): improve repo manager dialog layout

Optimize dialog structure with fixed header and scrollable content:
- Add flexbox layout with fixed header and scrollable body
- Remove outer border wrapper for cleaner appearance
- Match SkillsPage design pattern for consistency
- Improve UX with better content hierarchy

src-tauri/src/lib.rs

@@ -31,11 +31,13 @@ pub use mcp::{
 };
 pub use provider::{Provider, ProviderMeta};
 pub use services::{
-    ConfigService, EndpointLatency, McpService, PromptService, ProviderService, SpeedtestService,
+    ConfigService, EndpointLatency, McpService, PromptService, ProviderService, SkillService,
+    SpeedtestService,
 };
 pub use settings::{update_settings, AppSettings};
 pub use store::AppState;
 
+use std::sync::Arc;
 use tauri::{
     menu::{CheckMenuItem, Menu, MenuBuilder, MenuItem},
     tray::{TrayIconBuilder, TrayIconEvent},
@@ -495,6 +497,17 @@ pub fn run() {
             let _tray = tray_builder.build(app)?;
             // 将同一个实例注入到全局状态，避免重复创建导致的不一致
             app.manage(app_state);
+
+            // 初始化 SkillService
+            match SkillService::new() {
+                Ok(skill_service) => {
+                    app.manage(commands::skill::SkillServiceState(Arc::new(skill_service)));
+                }
+                Err(e) => {
+                    log::warn!("初始化 SkillService 失败: {e}");
+                }
+            }
+
             Ok(())
         })
         .invoke_handler(tauri::generate_handler![
@@ -573,6 +586,13 @@ pub fn run() {
             commands::open_file_dialog,
             commands::sync_current_providers_live,
             update_tray_menu,
+            // Skill management
+            commands::get_skills,
+            commands::install_skill,
+            commands::uninstall_skill,
+            commands::get_skill_repos,
+            commands::add_skill_repo,
+            commands::remove_skill_repo,
         ]);
 
     let app = builder