fix(logs): restrict websocket origin to prevent cswsh (LOG-2)

- Restrict WebSocket upgrade to same-origin or configured server_address allowed origins.
- Add comprehensive test suite in utils_test.go to verify origin matching rules.

internal/apps/admin/logs/utils.go

@@ -6,16 +6,44 @@ package logs
 
 import (
 	"net/http"
+	"net/url"
 	"strconv"
+	"strings"
 
 	"github.com/gorilla/websocket"
+
+	"github.com/Rain-kl/Wavelet/internal/model"
 )
 
-// getUpgrader 返回 WebSocket 升级器
+// getUpgrader 返回 WebSocket 升级器并执行 Origin 安全检查以防止 CSWSH 攻击
 func getUpgrader() *websocket.Upgrader {
 	return &websocket.Upgrader{
-		CheckOrigin: func(_ *http.Request) bool {
-			return true // CORS 由 Gin 中间件处理
+		CheckOrigin: func(r *http.Request) bool {
+			origin := r.Header.Get("Origin")
+			if origin == "" {
+				return true
+			}
+
+			// 1. 同源检查 (Same-origin check)
+			u, err := url.Parse(origin)
+			if err == nil && strings.EqualFold(u.Host, r.Host) {
+				return true
+			}
+
+			// 2. 检查配置的允许跨域 Origin (Check allowed origins in system config)
+			ctx := r.Context()
+			var sc model.SystemConfig
+			if err := sc.GetByKey(ctx, model.ConfigKeyServerAddress); err == nil && sc.Value != "" {
+				originToCheck := strings.TrimRight(strings.TrimSpace(origin), "/")
+				allowedOrigins := strings.Split(sc.Value, ",")
+				for _, allowed := range allowedOrigins {
+					allowed = strings.TrimRight(strings.TrimSpace(allowed), "/")
+					if allowed != "" && strings.EqualFold(allowed, originToCheck) {
+						return true
+					}
+				}
+			}
+			return false
 		},
 	}
 }

internal/apps/admin/logs/utils_test.go

@@ -0,0 +1,118 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package logs
+
+import (
+	"context"
+	"net/http"
+	"testing"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+
+	"github.com/Rain-kl/Wavelet/internal/db"
+	"github.com/Rain-kl/Wavelet/internal/model"
+)
+
+func setupTestDB(t *testing.T) *gorm.DB {
+	dbConn, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("failed to open sqlite in memory: %v", err)
+	}
+	err = dbConn.AutoMigrate(&model.SystemConfig{})
+	if err != nil {
+		t.Fatalf("failed to migrate schema: %v", err)
+	}
+	db.SetDB(dbConn)
+	return dbConn
+}
+
+func TestWebSocketCheckOrigin(t *testing.T) {
+	dbConn := setupTestDB(t)
+
+	// Clean up global DB after test
+	defer db.SetDB(nil)
+
+	// Seed ConfigKeyServerAddress with allowed frontend origin
+	allowedOrigin := "http://localhost:3000"
+	if err := dbConn.Create(&model.SystemConfig{
+		Key:   model.ConfigKeyServerAddress,
+		Value: allowedOrigin,
+	}).Error; err != nil {
+		t.Fatalf("failed to seed server address config: %v", err)
+	}
+
+	upgrader := getUpgrader()
+	if upgrader.CheckOrigin == nil {
+		t.Fatal("expected CheckOrigin to be defined")
+	}
+
+	tests := []struct {
+		name    string
+		origin  string
+		host    string
+		wantOK  bool
+	}{
+		{
+			name:   "empty origin (non-browser clients)",
+			origin: "",
+			host:   "localhost:8000",
+			wantOK: true,
+		},
+		{
+			name:   "same-origin request",
+			origin: "http://localhost:8000",
+			host:   "localhost:8000",
+			wantOK: true,
+		},
+		{
+			name:   "same-origin request case insensitive",
+			origin: "HTTP://LOCALHOST:8000",
+			host:   "localhost:8000",
+			wantOK: true,
+		},
+		{
+			name:   "configured allowed origin request",
+			origin: "http://localhost:3000",
+			host:   "localhost:8000",
+			wantOK: true,
+		},
+		{
+			name:   "configured allowed origin request with trailing slash",
+			origin: "http://localhost:3000/",
+			host:   "localhost:8000",
+			wantOK: true,
+		},
+		{
+			name:   "unauthorized third-party origin",
+			origin: "http://evil.com",
+			host:   "localhost:8000",
+			wantOK: false,
+		},
+		{
+			name:   "invalid origin format",
+			origin: "::not-a-valid-url",
+			host:   "localhost:8000",
+			wantOK: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req, err := http.NewRequestWithContext(context.Background(), "GET", "/api/v1/admin/logs/ws", nil)
+			if err != nil {
+				t.Fatalf("failed to create request: %v", err)
+			}
+			req.Host = tt.host
+			if tt.origin != "" {
+				req.Header.Set("Origin", tt.origin)
+			}
+
+			got := upgrader.CheckOrigin(req)
+			if got != tt.wantOK {
+				t.Errorf("CheckOrigin() = %v, want %v", got, tt.wantOK)
+			}
+		})
+	}
+}