platform: modularize api/gui, add docs-tests-web foundation, and refresh root config

selective-vpn-api/app/transport_singbox_profiles_features.go

@@ -0,0 +1,74 @@
+package app
+
+import (
+	"net/http"
+	"strings"
+	"time"
+)
+
+func handleTransportSingBoxFeatures(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	bin := ""
+	for _, cand := range []string{"/usr/local/bin/sing-box", "/usr/bin/sing-box", "sing-box"} {
+		if p, ok := findBinaryPath(cand); ok {
+			bin = p
+			break
+		}
+	}
+	version := ""
+	if bin != "" {
+		stdout, _, code, _ := runCommandTimeout(2*time.Second, bin, "version")
+		if code == 0 {
+			for _, line := range strings.Split(stdout, "\n") {
+				line = strings.TrimSpace(line)
+				if line == "" {
+					continue
+				}
+				version = line
+				break
+			}
+		}
+	}
+
+	writeJSON(w, http.StatusOK, SingBoxFeaturesResponse{
+		OK:      true,
+		Message: "ok",
+		Binary:  bin,
+		Version: version,
+		ProfileModes: map[string]bool{
+			string(SingBoxProfileModeTyped): true,
+			string(SingBoxProfileModeRaw):   true,
+		},
+		TypedProtocols: []string{"vless", "trojan", "shadowsocks", "wireguard", "hysteria2", "tuic"},
+		DNSFormats: map[string]bool{
+			"typed_servers":      true,
+			"typed_rules":        true,
+			"legacy_migration":   true,
+			"system_resolver":    true,
+			"rule_based_routing": true,
+		},
+		ErrorCodes: []string{
+			singBoxProfileCodeNotFound,
+			singBoxProfileCodeIDConflict,
+			singBoxProfileCodeBadID,
+			singBoxProfileCodeBadMode,
+			singBoxProfileCodeBadBaseRevision,
+			singBoxProfileCodeRevisionMismatch,
+			singBoxProfileCodeSaveFailed,
+			singBoxProfileCodeSecretsFailed,
+			singBoxProfileCodeValidationFailed,
+			singBoxProfileCodeRenderFailed,
+			singBoxProfileCodeApplyFailed,
+			singBoxProfileCodeRollbackFailed,
+			singBoxProfileCodeHistoryMissing,
+			singBoxProfileCodeNoClient,
+			singBoxProfileCodeClientKind,
+			singBoxProfileCodeRuntimeFailed,
+		},
+	})
+
+}