feat: init sproutclaw-web — Go+Gin backend + React frontend

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/services/slash_dispatch.go

@@ -0,0 +1,57 @@
+package services
+
+import (
+	"strings"
+)
+
+// supportedWebUICommands is the whitelist of commands the WebUI handles.
+var supportedWebUICommands = map[string]bool{
+	"compact": true,
+	"new":     true,
+	"reload":  true,
+	"clone":   true,
+	"name":    true,
+	"model":   true,
+	"session": true,
+	"export":  true,
+	"copy":    true,
+}
+
+// SlashDispatchResult holds the parsed result of a slash command attempt.
+type SlashDispatchResult struct {
+	Handled bool
+	Command string
+	Args    string
+	// For unsupported commands, return a friendly message
+	Message string
+}
+
+// TrySlashDispatch checks if the message is a slash command the WebUI supports.
+func TrySlashDispatch(message string) SlashDispatchResult {
+	if !strings.HasPrefix(message, "/") {
+		return SlashDispatchResult{}
+	}
+	// strip leading slash and split
+	trimmed := strings.TrimPrefix(message, "/")
+	parts := strings.SplitN(trimmed, " ", 2)
+	cmd := strings.ToLower(parts[0])
+	args := ""
+	if len(parts) > 1 {
+		args = strings.TrimSpace(parts[1])
+	}
+
+	if !supportedWebUICommands[cmd] {
+		return SlashDispatchResult{
+			Handled: true,
+			Command: cmd,
+			Args:    args,
+			Message: "该命令在 WebUI 模式下暂不支持，请在终端中使用",
+		}
+	}
+
+	return SlashDispatchResult{
+		Handled: true,
+		Command: cmd,
+		Args:    args,
+	}
+}