feat: add Cobra CLI, LSP/MCP registries, workflow engine, and enriched dashboard

Major changes:
- Refactor CLI entry point to Cobra commands (root, setup, scan, doctor, install, update, lsp, mcp, skills, config, version)
- Add LSP registry with health checks, auto-install, and editor config generation
- Add MCP registry with editor detection, status tracking, and per-editor configuration
- Add workflow engine with planner and step execution for automated task chains
- Add conversation search, export (Markdown/JSON), and detailed token counting
- Add streaming shell chat handler with tool call/result events
- Add skill validation, dry-run testing, and export endpoints
- Enrich dashboard with Tools/Activity/Status tabs and tool cards grid
- Add PRD documentation
- Complete i18n for both EN and FR

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

internal/api/handlers_tools.go

@@ -3,7 +3,9 @@ package api
 import (
 	"encoding/json"
 	"net/http"
+	"sync"
 
+	"github.com/muyue/muyue/internal/installer"
 	"github.com/muyue/muyue/internal/scanner"
 	"github.com/muyue/muyue/internal/updater"
 )
@@ -49,7 +51,30 @@ func (s *Server) handleInstall(w http.ResponseWriter, r *http.Request) {
 		writeError(w, "no tools specified", http.StatusBadRequest)
 		return
 	}
-	writeJSON(w, map[string]string{"status": "installing"})
+
+	results := make([]installer.InstallResult, len(body.Tools))
+	var wg sync.WaitGroup
+	var mu sync.Mutex
+
+	for i, tool := range body.Tools {
+		wg.Add(1)
+		go func(idx int, name string) {
+			defer wg.Done()
+			inst := installer.New(s.config)
+			res := inst.InstallTool(name)
+			mu.Lock()
+			results[idx] = res
+			mu.Unlock()
+		}(i, tool)
+	}
+
+	wg.Wait()
+
+	writeJSON(w, map[string]interface{}{
+		"status":  "done",
+		"tools":   body.Tools,
+		"results": results,
+	})
 }
 
 func (s *Server) handleRunUpdate(w http.ResponseWriter, r *http.Request) {