End every wait in flight when the tool runner stops (issue 745)

Closing the console shut its server down with a context that never ends, so a stop or restart of
the tool runner waited on any mesh_wait in flight for up to ten minutes. The server's base context
is now cancelled first, ending every wait at once, with a five-second shutdown as a backstop
(second review of issue 745).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

node-tools/internal/console/http.go

@@ -10,6 +10,7 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/novox/mesh-tools/node-tools/internal/wire"
 )
@@ -45,12 +46,30 @@ func Serve(s *Surface, listen string) (*Listening, error) {
 	if err != nil {
 		return nil, err
 	}
-	server := &http.Server{Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { route(w, r, s) })}
+	// Every request's context ends when the console is closed, so a mesh_wait in flight ends at once rather
+	// than holding a stop or a restart for up to its ten minutes (the review of issue 745).
+	base, cancel := context.WithCancel(context.Background())
+	server := &http.Server{Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { route(w, r, s) }),
+		BaseContext: func(net.Listener) context.Context { return base }}
 	go func() { _ = server.Serve(ln) }()
 	bound := ln.Addr().(*net.TCPAddr).Port
-	return &Listening{Address: host + ":" + strconv.Itoa(bound), Close: func() error { return server.Shutdown(context.Background()) }}, nil
+	return &Listening{Address: host + ":" + strconv.Itoa(bound), Close: func() error {
+		cancel()
+		// A backstop: what is still answering after the cancel is cut off, never waited on for long.
+		ctx, done := context.WithTimeout(context.Background(), ShutdownWithin)
+		defer done()
+		err := server.Shutdown(ctx)
+		if errors.Is(err, context.DeadlineExceeded) {
+			return server.Close()
+		}
+		return err
+	}}, nil
 }
 
+// ShutdownWithin is how long closing the console waits for the requests still being answered after their
+// context was cancelled.
+var ShutdownWithin = 5 * time.Second
+
 func route(w http.ResponseWriter, r *http.Request, s *Surface) {
 	switch r.URL.Path {
 	case "/":
@@ -89,7 +108,7 @@ func route(w http.ResponseWriter, r *http.Request, s *Surface) {
 		}
 		replies := []*Reply{}
 		for _, req := range batch {
-			if reply := s.Handle(req); reply != nil {
+			if reply := s.HandleContext(r.Context(), req); reply != nil {
 				replies = append(replies, reply)
 			}
 		}
@@ -105,7 +124,7 @@ func route(w http.ResponseWriter, r *http.Request, s *Surface) {
 		writeJSON(w, 400, map[string]any{"jsonrpc": "2.0", "id": nil, "error": map[string]any{"code": -32700, "message": "the body is not JSON"}})
 		return
 	}
-	reply := s.Handle(req)
+	reply := s.HandleContext(r.Context(), req)
 	if reply == nil {
 		w.WriteHeader(202)
 		return