Remove streamSettings for protocols that don't support it

- Frontend: Only include streamSettings in toJson() for vmess, vless, trojan, shadowsocks, and hysteria protocols
- Frontend: Hide Stream tab in Advanced section for unsupported protocols
- Frontend: Clear streamSettings in Advanced tab when switching to unsupported protocols
- Frontend: Add CodeMirror JSON editor to config view in index page with mobile responsive design
- Backend: Add normalizeStreamSettings() to clear streamSettings for tunnel, mixed, http, tun, and wireguard protocols
- Backend: Apply normalization in AddInbound() and UpdateInbound()
- Backend: Add omitempty JSON tag to StreamSettings field to exclude null values from Xray config

xray/config.go

@@ -11,17 +11,17 @@ import (
 type Config struct {
 	LogConfig        json_util.RawMessage `json:"log"`
 	RouterConfig     json_util.RawMessage `json:"routing"`
-	DNSConfig        json_util.RawMessage `json:"dns"`
+	DNSConfig        json_util.RawMessage `json:"dns,omitempty"`
 	InboundConfigs   []InboundConfig      `json:"inbounds"`
 	OutboundConfigs  json_util.RawMessage `json:"outbounds"`
-	Transport        json_util.RawMessage `json:"transport"`
+	Transport        json_util.RawMessage `json:"transport,omitempty"`
 	Policy           json_util.RawMessage `json:"policy"`
 	API              json_util.RawMessage `json:"api"`
 	Stats            json_util.RawMessage `json:"stats"`
-	Reverse          json_util.RawMessage `json:"reverse"`
-	FakeDNS          json_util.RawMessage `json:"fakedns"`
-	Observatory      json_util.RawMessage `json:"observatory"`
-	BurstObservatory json_util.RawMessage `json:"burstObservatory"`
+	Reverse          json_util.RawMessage `json:"reverse,omitempty"`
+	FakeDNS          json_util.RawMessage `json:"fakedns,omitempty"`
+	Observatory      json_util.RawMessage `json:"observatory,omitempty"`
+	BurstObservatory json_util.RawMessage `json:"burstObservatory,omitempty"`
 	Metrics          json_util.RawMessage `json:"metrics"`
 }
 

xray/inbound.go

@@ -13,9 +13,9 @@ type InboundConfig struct {
 	Port           int                  `json:"port"`
 	Protocol       string               `json:"protocol"`
 	Settings       json_util.RawMessage `json:"settings"`
-	StreamSettings json_util.RawMessage `json:"streamSettings"`
+	StreamSettings json_util.RawMessage `json:"streamSettings,omitempty"`
 	Tag            string               `json:"tag"`
-	Sniffing       json_util.RawMessage `json:"sniffing"`
+	Sniffing       json_util.RawMessage `json:"sniffing,omitempty"`
 }
 
 // Equals compares two InboundConfig instances for deep equality.