chore: import Local-Cursor v1.1.8 source snapshot

Includes the current working directory changes. Historical commits and release binaries are excluded to limit Gitea storage.
Source base: d7515973fbfd6dd2001fa156c483455b8081c7cb

internal/backend/server/url.go

@@ -0,0 +1,25 @@
+package server
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+func ParseAndValidateRawURL(raw string) (*url.URL, error) {
+	value := strings.TrimSpace(raw)
+	if value == "" {
+		return nil, fmt.Errorf("empty raw url")
+	}
+	parsed, err := url.Parse(value)
+	if err != nil {
+		return nil, err
+	}
+	if parsed.Scheme != "http" && parsed.Scheme != "https" {
+		return nil, fmt.Errorf("unsupported scheme %q", parsed.Scheme)
+	}
+	if strings.TrimSpace(parsed.Host) == "" {
+		return nil, fmt.Errorf("empty host")
+	}
+	return parsed, nil
+}