fix(client): watch only rule paths, forget vanished worktrees, ping http2

backend/internal/client/rules.go

@@ -61,14 +61,17 @@ func (rules Rules) paths() []string {
 func (rules Rules) covers(file string, shared bool) bool {
 	best := Rule{}
 	for _, rule := range rules {
-		matches := file == rule.Path || strings.HasPrefix(file, rule.Path+"/")
-		if matches && len(rule.Path) > len(best.Path) {
+		if within(file, rule.Path) && len(rule.Path) > len(best.Path) {
 			best = rule
 		}
 	}
 	return best.Path != "" && best.Shared == shared
 }
 
+func within(path, dir string) bool {
+	return path == dir || strings.HasPrefix(path, dir+"/")
+}
+
 func writeExclude(repo *gitrepo.Repo, rules Rules) error {
 	file := filepath.Join(repo.CommonDir, "info", "exclude")
 	current, _ := os.ReadFile(file)