chore: sub-store Go 重写项目初始化

internal/render/json.go

@@ -0,0 +1,31 @@
+package render
+
+import (
+	"encoding/json"
+
+	"github.com/peterqiu0516/sub-store/internal/model"
+)
+
+// RenderJson renders proxies as a raw JSON object: {"proxies": [...]}.
+func RenderJson(proxies []model.ProxyNode) string {
+	// Convert each ProxyNode (map[string]any) to a clean map with nil values removed
+	cleaned := make([]any, 0, len(proxies))
+	for _, p := range proxies {
+		cleaned = append(cleaned, stripNil(p))
+	}
+	doc := map[string]any{"proxies": cleaned}
+	data, _ := json.MarshalIndent(doc, "", "  ")
+	return string(data)
+}
+
+// stripNil removes nil values from a map recursively (shallow).
+func stripNil(m map[string]any) map[string]any {
+	result := make(map[string]any, len(m))
+	for k, v := range m {
+		if v == nil {
+			continue
+		}
+		result[k] = v
+	}
+	return result
+}