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

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

backend/internal/handlers/commands.go

@@ -0,0 +1,18 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"sproutclaw-web/internal/config"
+	"sproutclaw-web/internal/models"
+	"sproutclaw-web/internal/services"
+)
+
+// RegisterCommands registers the slash commands list route.
+func RegisterCommands(r *gin.RouterGroup, cfg *config.Config) {
+	r.GET("/commands", func(c *gin.Context) {
+		cmds := services.ListSlashCommands(cfg.AgentDir)
+		c.JSON(http.StatusOK, models.CommandsResponse{Commands: cmds})
+	})
+}