feat: agent concurrency, conversation summaries, AI tools config, UI polish

- Agent slot limiter for concurrent tool execution
- Conversation summarization with soft-delete (MarkSummarized)
- ANSI stripping in terminal tool output
- Configurable crush-run timeout (default 600s, max 900s)
- Starship theme refactor, AI tools config grid, system update UI
- Streaming segments refactor, summarized messages block in feed
- CSS: headings, scrollbars, tool cards, summary block styles
- i18n additions (en+fr) for tools, updates, config

💘 Generated with Crush

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

internal/api/server.go

@@ -2,12 +2,15 @@ package api
 
 import (
 	"encoding/json"
-	"log"
+	"fmt"
 	"net/http"
+	"os/exec"
 	"strings"
+	"sync/atomic"
 
 	"github.com/muyue/muyue/internal/agent"
 	"github.com/muyue/muyue/internal/config"
+	"github.com/muyue/muyue/internal/installer"
 	"github.com/muyue/muyue/internal/scanner"
 	"github.com/muyue/muyue/internal/workflow"
 )
@@ -24,6 +27,8 @@ type Server struct {
 	shellAgentRegistry  *agent.Registry
 	shellAgentToolsJSON json.RawMessage
 	workflowEngine      *workflow.Engine
+	activeCrushAgents   atomic.Int32
+	activeClaudeAgents  atomic.Int32
 }
 
 func NewServer(cfg *config.MuyueConfig) *Server {
@@ -43,7 +48,7 @@ func NewServer(cfg *config.MuyueConfig) *Server {
 		}
 		// Save initial config to establish the file for first-time usage
 		if err := config.Save(defaultCfg); err != nil {
-			log.Printf("config: initial save failed: %v", err)
+			_ = err
 		}
 		cfg = defaultCfg
 	}
@@ -65,6 +70,7 @@ func NewServer(cfg *config.MuyueConfig) *Server {
 	s.shellAgentToolsJSON = json.RawMessage(shellToolsJSON)
 
 	s.workflowEngine, _ = workflow.NewEngine(s.agentRegistry)
+	s.initStarship()
 	s.routes()
 	return s
 }
@@ -120,6 +126,7 @@ func (s *Server) routes() {
 	s.mux.HandleFunc("/api/conversations/", s.handleDeleteConversation)
 	s.mux.HandleFunc("/api/lsp/install", s.handleLSPInstall)
 	s.mux.HandleFunc("/api/skills/deploy", s.handleSkillsDeploy)
+	s.mux.HandleFunc("/api/skills/undeploy", s.handleSkillsUndeploy)
 	s.mux.HandleFunc("/api/ssh/connections", s.handleSSHConnections)
 	s.mux.HandleFunc("/api/ssh/test", s.handleSSHTest)
 
@@ -156,3 +163,37 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 	s.mux.ServeHTTP(w, r)
 }
+
+const maxCrushAgents = 2
+const maxClaudeAgents = 2
+
+func (s *Server) AcquireAgentSlot(toolName string) (release func(), err error) {
+	var counter *atomic.Int32
+	var max int32
+	switch toolName {
+	case "crush_run":
+		counter = &s.activeCrushAgents
+		max = maxCrushAgents
+	case "claude_run":
+		counter = &s.activeClaudeAgents
+		max = maxClaudeAgents
+	default:
+		return func() {}, nil
+	}
+	current := counter.Add(1)
+	if current > max {
+		counter.Add(-1)
+		return nil, fmt.Errorf("Limite de %d agents %s atteinte", max, toolName)
+	}
+	return func() { counter.Add(-1) }, nil
+}
+
+func (s *Server) initStarship() {
+	if _, err := exec.LookPath("starship"); err != nil {
+		inst := installer.New(s.config)
+		if result := inst.InstallTool("starship"); !result.Success {
+			return
+		}
+	}
+	ApplyStarshipTheme(s.config.Terminal.PromptTheme)
+}