feat: RAG, memory, plugins, lessons, file editor, split panes, Markdown rendering, PWA + UI overhaul

Major additions:
- RAG pipeline (indexing, chunking, search) with sidebar upload button
- Memory system with CRUD API
- Plugins and lessons modules
- MCP discovery and MCP server
- Advanced skills (auto-create, conditional, improver)
- Agent browser/image support, delegate, sessions
- File editor with CodeMirror in split panes
- Markdown rendering via react-markdown + KaTeX + highlight.js
- Raw markdown toggle
- PWA manifest + service worker
- Extension UI redesign with new design tokens and studio-style chat
- Pipeline API for chat streaming
- Mobile responsive layout

💘 Generated with Crush

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

internal/api/server.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"net/http"
@@ -11,6 +12,11 @@ import (
 	"github.com/muyue/muyue/internal/agent"
 	"github.com/muyue/muyue/internal/config"
 	"github.com/muyue/muyue/internal/installer"
+	"github.com/muyue/muyue/internal/lessons"
+	"github.com/muyue/muyue/internal/memory"
+	"github.com/muyue/muyue/internal/mcpserver"
+	"github.com/muyue/muyue/internal/plugins"
+	"github.com/muyue/muyue/internal/rag"
 	"github.com/muyue/muyue/internal/scanner"
 	"github.com/muyue/muyue/internal/workflow"
 )
@@ -27,9 +33,16 @@ type Server struct {
 	shellAgentRegistry  *agent.Registry
 	shellAgentToolsJSON json.RawMessage
 	workflowEngine      *workflow.Engine
+	pluginManager       *plugins.Manager
+	hookRegistry        *plugins.HookRegistry
 	browserTestStore    *BrowserTestStore
+	memoryStore         *memory.Store
+	ragStore            *rag.Store
+	pipeline            *Pipeline
 	activeCrushAgents   atomic.Int32
 	activeClaudeAgents  atomic.Int32
+	mcpServer           *mcpserver.MCPServer
+	agentTracker        *AgentSessionTracker
 }
 
 func NewServer(cfg *config.MuyueConfig) *Server {
@@ -76,6 +89,33 @@ func NewServer(cfg *config.MuyueConfig) *Server {
 	s.shellAgentToolsJSON = json.RawMessage(shellToolsJSON)
 
 	s.workflowEngine, _ = workflow.NewEngine(s.agentRegistry)
+
+	if cfg.Lessons.Enabled {
+		lessons.EnsureBuiltinLessons()
+	}
+
+	s.hookRegistry = plugins.NewHookRegistry()
+	s.pluginManager = plugins.NewManager(s.hookRegistry)
+
+	pluginPaths := cfg.Plugins.Paths
+	if len(pluginPaths) == 0 {
+		pluginPaths = plugins.DefaultPluginPaths()
+	}
+	discovered := plugins.DiscoverPlugins(pluginPaths)
+	for _, dp := range discovered {
+		if dp.Valid {
+			p, err := plugins.LoadExecutablePlugin(dp)
+			if err == nil {
+					s.pluginManager.Register(p)
+			}
+		}
+	}
+	s.pluginManager.EnableFromConfig(context.Background(), cfg.Plugins.Enabled, s.agentRegistry)
+
+	s.pipeline = NewPipeline()
+
+	s.agentTracker = NewAgentSessionTracker()
+
 	s.initStarship()
 	s.routes()
 	return s
@@ -108,6 +148,7 @@ func (s *Server) routes() {
 	s.mux.HandleFunc("/api/starship/apply-theme", s.handleApplyStarshipTheme)
 	s.mux.HandleFunc("/api/providers/validate", s.handleValidateProvider)
 	s.mux.HandleFunc("/api/update/run", s.handleRunUpdate)
+	s.mux.HandleFunc("/api/images/generate", s.handleImageGenerate)
 	s.mux.HandleFunc("/api/images/", s.handleServeImage)
 	s.mux.HandleFunc("/api/chat", s.handleChat)
 	s.mux.HandleFunc("/api/chat/history", s.handleChatHistory)
@@ -157,6 +198,41 @@ func (s *Server) routes() {
 	s.mux.HandleFunc("/api/test/sessions", s.handleBrowserTestSessions)
 	s.mux.HandleFunc("/api/test/console/", s.handleBrowserTestConsole)
 	s.mux.HandleFunc("/api/ws/browser-test", s.handleBrowserTestWS)
+
+	s.mux.HandleFunc("/api/skills/auto-create", s.handleSkillAutoCreate)
+	s.mux.HandleFunc("/api/skills/proposals", s.handleSkillProposals)
+	s.mux.HandleFunc("/api/skills/detail/", s.handleSkillDetail)
+	s.mux.HandleFunc("/api/plugins", s.handlePlugins)
+	s.mux.HandleFunc("/api/plugins/", s.handlePluginAction)
+	s.mux.HandleFunc("/api/lessons", s.handleLessons)
+	s.mux.HandleFunc("/api/lessons/match", s.handleLessonsMatch)
+	s.mux.HandleFunc("/api/mcp/discover", s.handleMCPDiscover)
+	s.mux.HandleFunc("/api/browser/navigate", s.handleBrowserNavigate)
+	s.mux.HandleFunc("/api/browser/screenshot", s.handleBrowserScreenshot)
+	s.mux.HandleFunc("/api/browser/action", s.handleBrowserAction)
+
+	s.mux.HandleFunc("/api/rag/index", s.handleRAGIndex)
+	s.mux.HandleFunc("/api/rag/search", s.handleRAGSearch)
+	s.mux.HandleFunc("/api/rag/status", s.handleRAGStatus)
+	s.mux.HandleFunc("/api/rag/documents", s.handleRAGDocuments)
+	s.mux.HandleFunc("/api/rag/index/", s.handleRAGDelete)
+	s.mux.HandleFunc("/api/pipeline/filters", s.handlePipelineFilters)
+	s.mux.HandleFunc("/api/pipeline/filters/", s.handlePipelineToggle)
+	s.mux.HandleFunc("/api/memory", s.handleMemoryList)
+	s.mux.HandleFunc("/api/memory/create", s.handleMemoryCreate)
+	s.mux.HandleFunc("/api/memory/", s.handleMemoryOperation)
+	s.mux.HandleFunc("/api/memory/search", s.handleMemorySearch)
+	s.mux.HandleFunc("/api/memory/recall", s.handleMemoryRecall)
+	s.mux.HandleFunc("/api/memory/context", s.handleMemoryContext)
+	s.mux.HandleFunc("/api/files/content", s.handleFileContent)
+	s.mux.HandleFunc("/api/mcp-server/status", s.handleMuyueMCPServerStatus)
+	s.mux.HandleFunc("/api/mcp-server/start", s.handleMuyueMCPServerStart)
+	s.mux.HandleFunc("/api/mcp-server/stop", s.handleMuyueMCPServerStop)
+	s.mux.HandleFunc("/api/agent-sessions", s.handleAgentSessionsList)
+	s.mux.HandleFunc("/api/agent-sessions/", s.handleAgentSessionOutput)
+	s.mux.HandleFunc("/api/workspaces", s.handleWorkspaceList)
+	s.mux.HandleFunc("/api/workspace", s.handleWorkspaceSave)
+	s.mux.HandleFunc("/api/workspace/", s.handleWorkspaceGet)
 }
 
 func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
@@ -227,3 +303,16 @@ func (s *Server) initStarship() {
 	}
 	ApplyStarshipTheme(s.config.Terminal.PromptTheme)
 }
+
+func (s *Server) buildMemoryContext(query string) string {
+	store, err := s.ensureMemoryStore()
+	if err != nil {
+		return ""
+	}
+	injector := memory.NewInjector(store)
+	ctx, err := injector.BuildContextBlock(query)
+	if err != nil {
+		return ""
+	}
+	return ctx
+}