feat(cursor): add independent Cursor protocol debugging proxy and build tasks

- Introduced a new task for running the Cursor protocol debugging proxy.
- Added a build task for the Cursor protocol debugging proxy.
- Updated documentation to include usage instructions for the debugging tool.

cursor-proxy-debugger/web.go

@@ -0,0 +1,112 @@
+package proxydebugger
+
+import (
+	"embed"
+	"encoding/json"
+	"fmt"
+	"io/fs"
+	"net/http"
+	"strings"
+	"time"
+
+	"cursor/internal/certs"
+)
+
+//go:embed web/*
+var webAssets embed.FS
+
+func (server *Server) newUIHandler() http.Handler {
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /api/status", server.handleStatus)
+	mux.HandleFunc("GET /api/exchanges", server.handleExchangeList)
+	mux.HandleFunc("GET /api/exchanges/{id}", server.handleExchangeDetail)
+	mux.HandleFunc("DELETE /api/exchanges", server.handleClearExchanges)
+	mux.HandleFunc("GET /api/events", server.handleEvents)
+	mux.HandleFunc("GET /api/ca.crt", server.handleCACertificate)
+	assets, _ := fs.Sub(webAssets, "web")
+	fileServer := http.FileServer(http.FS(assets))
+	mux.Handle("/", fileServer)
+	return securityHeaders(mux)
+}
+
+func (server *Server) handleStatus(writer http.ResponseWriter, _ *http.Request) {
+	writeJSON(writer, http.StatusOK, map[string]any{
+		"proxyAddr":  server.config.ProxyAddr,
+		"uiAddr":     server.config.UIAddr,
+		"targetHost": server.config.TargetHost,
+		"running":    true,
+	})
+}
+
+func (server *Server) handleExchangeList(writer http.ResponseWriter, _ *http.Request) {
+	writeJSON(writer, http.StatusOK, server.store.summaries())
+}
+
+func (server *Server) handleExchangeDetail(writer http.ResponseWriter, request *http.Request) {
+	id := strings.TrimSpace(request.PathValue("id"))
+	exchange, ok := server.store.get(id)
+	if !ok {
+		writeJSON(writer, http.StatusNotFound, map[string]string{"error": "请求记录不存在"})
+		return
+	}
+	writeJSON(writer, http.StatusOK, exchange)
+}
+
+func (server *Server) handleClearExchanges(writer http.ResponseWriter, _ *http.Request) {
+	server.store.clear()
+	writer.WriteHeader(http.StatusNoContent)
+}
+
+func (server *Server) handleEvents(writer http.ResponseWriter, request *http.Request) {
+	flusher, ok := writer.(http.Flusher)
+	if !ok {
+		http.Error(writer, "当前响应不支持流式刷新", http.StatusInternalServerError)
+		return
+	}
+	writer.Header().Set("Content-Type", "text/event-stream")
+	writer.Header().Set("Cache-Control", "no-cache")
+	writer.Header().Set("Connection", "keep-alive")
+	updates, unsubscribe := server.store.subscribe()
+	defer unsubscribe()
+	fmt.Fprint(writer, "event: ready\ndata: {}\n\n")
+	flusher.Flush()
+	heartbeat := time.NewTicker(15 * time.Second)
+	defer heartbeat.Stop()
+	for {
+		select {
+		case <-request.Context().Done():
+			return
+		case event, open := <-updates:
+			if !open {
+				return
+			}
+			payload, _ := json.Marshal(event)
+			fmt.Fprintf(writer, "event: update\ndata: %s\n\n", payload)
+			flusher.Flush()
+		case <-heartbeat.C:
+			fmt.Fprint(writer, ": heartbeat\n\n")
+			flusher.Flush()
+		}
+	}
+}
+
+func (server *Server) handleCACertificate(writer http.ResponseWriter, _ *http.Request) {
+	writer.Header().Set("Content-Type", "application/x-x509-ca-cert")
+	writer.Header().Set("Content-Disposition", `attachment; filename="cursor-local-proxy-ca.crt"`)
+	_, _ = writer.Write(certs.EmbeddedCACertPEM())
+}
+
+func writeJSON(writer http.ResponseWriter, status int, payload any) {
+	writer.Header().Set("Content-Type", "application/json; charset=utf-8")
+	writer.WriteHeader(status)
+	_ = json.NewEncoder(writer).Encode(payload)
+}
+
+func securityHeaders(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		writer.Header().Set("X-Content-Type-Options", "nosniff")
+		writer.Header().Set("Referrer-Policy", "no-referrer")
+		writer.Header().Set("Content-Security-Policy", "default-src 'self'; script-src 'self'; style-src 'self'; connect-src 'self'")
+		next.ServeHTTP(writer, request)
+	})
+}