add proxy settings

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

back/internal/api/handler/config.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"os/exec"
 	"sort"
 	"sync"
 
@@ -40,11 +41,18 @@ func (h *ConfigHandler) Get(w http.ResponseWriter, r *http.Request) {
 			toolConfigs[toolName] = m
 		}
 	}
+	proxies := cfg.Proxies
+	if proxies == nil {
+		proxies = []config.ProxyEntry{}
+	}
+	_, pcErr := exec.LookPath("proxychains4")
 	respond.JSON(w, http.StatusOK, map[string]any{
-		"tools":    toolConfigs,
-		"profiles": cfg.Profiles,
-		"readonly": h.demo || config.IsReadonly(h.configPath),
-		"demo":     h.demo,
+		"tools":                toolConfigs,
+		"profiles":             cfg.Profiles,
+		"proxies":              proxies,
+		"proxychains_available": pcErr == nil,
+		"readonly":             h.demo || config.IsReadonly(h.configPath),
+		"demo":                 h.demo,
 	})
 }
 
@@ -512,6 +520,39 @@ func (h *ConfigHandler) DeleteProfileToolConfig(w http.ResponseWriter, r *http.R
 	w.WriteHeader(http.StatusNoContent)
 }
 
+// PUT /api/config/proxies
+func (h *ConfigHandler) UpdateProxies(w http.ResponseWriter, r *http.Request) {
+	if h.demo {
+		respond.Error(w, http.StatusForbidden, "demo mode: modifications are disabled")
+		return
+	}
+	if config.IsReadonly(h.configPath) {
+		respond.Error(w, http.StatusForbidden, "config is read-only")
+		return
+	}
+
+	var proxies []config.ProxyEntry
+	if err := json.NewDecoder(r.Body).Decode(&proxies); err != nil {
+		respond.Error(w, http.StatusBadRequest, "invalid JSON: "+err.Error())
+		return
+	}
+
+	h.mu.Lock()
+	defer h.mu.Unlock()
+
+	cfg, err := config.Load(h.configPath)
+	if err != nil {
+		respond.Error(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	cfg.Proxies = proxies
+	if err := config.Save(h.configPath, cfg); err != nil {
+		respond.Error(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	respond.JSON(w, http.StatusOK, proxies)
+}
+
 func validateProfileName(name string) error {
 	for _, c := range name {
 		if !((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '-') {

back/internal/api/router.go

@@ -55,6 +55,7 @@ func NewRouter(
 
 		r.Route("/config", func(r chi.Router) {
 			r.Get("/", configHandler.Get)
+			r.Put("/proxies", configHandler.UpdateProxies)
 
 			r.Route("/tools", func(r chi.Router) {
 				r.Patch("/{toolName}", configHandler.UpdateToolConfig)