feat: 添加公告系统（支持SQLite和PostgreSQL） (#129)

* feat(announcement): add database schema for SQLite and PostgreSQL

Add announcement table with id, title, content, enabled, created_at, updated_at columns to both SQLite and PostgreSQL schemas to support announcement system.

* feat(announcement): implement SQLite repository for announcement management

Add announcement CRUD operations in SQLite repository including create, read, update, delete, and list methods with proper error handling.

* feat(announcement): add HTTP handlers and auth middleware for announcement API

Implement admin-only update endpoint and public read endpoint for announcements. Add auth middleware to enforce admin-only access for update operations.

* feat(announcement): add frontend API client for announcement endpoints

Implement API client methods for fetching announcements and updating announcement settings with proper error handling.

* feat(announcement): add announcement display component to dashboard

Implement announcement display section in dashboard with real-time updates and proper styling using HeroUI components.

* feat(announcement): add announcement management UI to config page

Implement announcement settings panel with enable/disable toggle and content editor for admin users to manage announcements.

AGENTS.md

@@ -1,8 +1,8 @@
 # PROJECT KNOWLEDGE BASE
 
-**Generated:** Fri Feb 13 2026
-**Commit:** 3799729
-**Branch:** (detached)
+**Generated:** Sun Feb 15 2026
+**Commit:** e5e22ba
+**Branch:** main
 
 ## OVERVIEW
 FLVX (formerly Flux Panel) is a traffic forwarding management system built on a forked GOST v3 stack. It ships as a Go-based admin API (SQLite) + Vite/React UI + Go forwarding agent, with optional mobile WebView wrappers.
@@ -43,8 +43,10 @@ FLVX (formerly Flux Panel) is a traffic forwarding management system built on a
 
 
 ## CONVENTIONS
-- `Authorization` header carries the raw JWT token (no `Bearer` prefix) between `vite-frontend/` and `go-backend/`.
-- `go-gost/` uses `replace github.com/go-gost/x => ./x` and `go-gost/x/` is also its own Go module.
+- **Auth**: `Authorization` header carries the raw JWT token (no `Bearer` prefix) between `vite-frontend/` and `go-backend/`.
+- **Module Fork**: `go-gost/` uses `replace github.com/go-gost/x => ./x` and `go-gost/x/` is also its own Go module.
+- **Encryption**: Agent-to-panel communication uses AES encryption with node `secret` as PSK.
+- **API Envelope**: All REST responses follow `{code, msg, data, ts}` structure (code 0 = success).
 
 ## ANTI-PATTERNS (THIS PROJECT)
 - **DO NOT EDIT** generated protobuf output: `go-gost/x/internal/util/grpc/proto/*.pb.go`, `go-gost/x/internal/util/grpc/proto/*_grpc.pb.go`.
@@ -69,9 +71,19 @@ docker compose -f docker-compose-v6.yml up -d
 (cd go-gost && go run .)
 ```
 
+## UNIQUE STYLES
+- **Flat Monorepo**: Language-prefixed dirs (`go-backend`, `go-gost`, `vite-frontend`) instead of `apps/`/`libs/`.
+- **Asymmetric Go Layout**: `go-backend` follows `cmd/<app>/main.go` while `go-gost` uses `root/main.go`.
+- **Frontend Hybrid Mode**: `App.tsx` detects "H5 mode" (mobile WebView) vs desktop, dictating layout strategy.
+
 ## NOTES
 - LSP servers are not installed in this environment (gopls/jdtls/typescript-language-server); rely on grep-based navigation.
 - `vite-frontend/vite.config.ts` sets `minify: false` and disables treeshake; expect larger bundles.
+- `vite-frontend` uses `rolldown-vite` (experimental Rust bundler) instead of standard Vite.
 - Install scripts (`install.sh`, `panel_install.sh`) self-delete after execution - common pattern in one-liner installs.
-- CI uses UPX compression on Go binaries before release.
-- Backend has contract tests in `go-backend/tests/contract/` - frontend has no test infrastructure.
+- CI uses UPX compression (`--best --lzma`) on Go binaries before release.
+- CI dynamically injects `PINNED_VERSION` into install scripts and docker-compose files during releases.
+- `panel_install.sh` auto-detects IPv6 and modifies `/etc/docker/daemon.json` to enable IPv6 bridge.
+- Download proxy `https://gcode.hostcentral.cc/` used for GitHub downloads in China/restricted environments.
+- Backend has contract tests in `go-backend/tests/contract/` - frontend has no test infrastructure (Vitest/Jest not configured).
+- `analysis/3x-ui/` contains a separate git repo for reference/comparison - not part of FLVX core.

go-backend/AGENTS.md

@@ -1,8 +1,8 @@
 # GO BACKEND KNOWLEDGE BASE
 
 ## OVERVIEW
-Go-based Admin API for FLVX (formerly Flux Panel). Replaces the legacy Spring Boot backend.
-**Stack:** Go 1.23, net/http (std lib), SQLite (modernc.org/sqlite).
+Go-based Admin API for FLVX. Replaced legacy Spring Boot backend.
+**Stack:** Go 1.23, net/http (std lib), SQLite/PostgreSQL (modernc.org/sqlite - CGO-free).
 
 ## STRUCTURE
 ```
@@ -34,14 +34,21 @@ go-backend/
 
 ## CONVENTIONS
 - **No ORM**: Uses raw SQL with `database/sql` and `modernc.org/sqlite`.
+- **CGO-Free SQLite**: `modernc.org/sqlite` instead of `mattn/go-sqlite3` - builds without CGO.
 - **Standard Lib**: Uses `net/http` for routing (Go 1.22+ patterns).
 - **Auth**: Expects raw JWT in `Authorization` header (no `Bearer` prefix).
+- **API Envelope**: All responses use `response.R{code, msg, data, ts}` structure.
 - **Config**: Loaded from environment variables (see `cmd/paneld/main.go`).
+- **SQL Idempotency**: Prefer `ON CONFLICT DO NOTHING` for inserts in migrations/sync.
+
+## ANTI-PATTERNS
+- **DO NOT USE** ORM - uses raw SQL throughout.
+- **DO NOT CHANGE** handler signatures without updating `router.go`.
 
 ## COMMANDS
 ```bash
 cd go-backend
-go run ./cmd/paneld
+go run ./cmd/paneld       # Default: SERVER_ADDR=:6365
 go test ./...
 make build
 ```

go-backend/internal/http/handler/AGENTS.md

@@ -1,6 +1,6 @@
 # BACKEND HTTP HANDLER KNOWLEDGE BASE
 
-**Generated:** Fri Feb 13 2026
+**Generated:** Sun Feb 15 2026
 
 ## OVERVIEW
 HTTP request handlers for FLVX Admin API. Core business logic layer.
@@ -29,8 +29,9 @@ handler/
 
 ## CONVENTIONS
 - Inherits from parent: raw SQL, no ORM, JWT in Authorization header.
-- Large files expected (`mutations.go` >100k LOC).
+- Large files expected (`mutations.go` 3716 LOC - central mutation hub).
 - Uses `sqlite.Repository` for DB access via `repo.XXX()` methods.
+- Domain-driven file split: one file per functional area (federation, jobs, etc.).
 
 ## ANTI-PATTERNS
 - Do NOT add ORM here - uses raw SQL throughout.

go-backend/internal/http/handler/dual_stack_test.go

@@ -0,0 +1,377 @@
+package handler
+
+import (
+	"testing"
+)
+
+// ---------------------------------------------------------------------------
+// nodeSupportsV4 / nodeSupportsV6
+// ---------------------------------------------------------------------------
+
+func TestNodeSupportsV4_Nil(t *testing.T) {
+	if nodeSupportsV4(nil) {
+		t.Fatal("nil node must not support v4")
+	}
+}
+
+func TestNodeSupportsV6_Nil(t *testing.T) {
+	if nodeSupportsV6(nil) {
+		t.Fatal("nil node must not support v6")
+	}
+}
+
+func TestNodeSupportsV4_ExplicitV4(t *testing.T) {
+	n := &nodeRecord{ServerIPv4: "10.0.0.1"}
+	if !nodeSupportsV4(n) {
+		t.Fatal("explicit server_ip_v4 must support v4")
+	}
+}
+
+func TestNodeSupportsV6_ExplicitV6(t *testing.T) {
+	n := &nodeRecord{ServerIPv6: "2001:db8::1"}
+	if !nodeSupportsV6(n) {
+		t.Fatal("explicit server_ip_v6 must support v6")
+	}
+}
+
+func TestNodeSupportsV4_OnlyV6Set(t *testing.T) {
+	n := &nodeRecord{ServerIPv6: "2001:db8::1"}
+	if nodeSupportsV4(n) {
+		t.Fatal("node with only v6 should not support v4")
+	}
+}
+
+func TestNodeSupportsV6_OnlyV4Set(t *testing.T) {
+	n := &nodeRecord{ServerIPv4: "10.0.0.1"}
+	if nodeSupportsV6(n) {
+		t.Fatal("node with only v4 should not support v6")
+	}
+}
+
+func TestNodeSupportsV4_DualStack(t *testing.T) {
+	n := &nodeRecord{ServerIPv4: "10.0.0.1", ServerIPv6: "2001:db8::1"}
+	if !nodeSupportsV4(n) {
+		t.Fatal("dual-stack node must support v4")
+	}
+}
+
+func TestNodeSupportsV6_DualStack(t *testing.T) {
+	n := &nodeRecord{ServerIPv4: "10.0.0.1", ServerIPv6: "2001:db8::1"}
+	if !nodeSupportsV6(n) {
+		t.Fatal("dual-stack node must support v6")
+	}
+}
+
+func TestNodeSupportsV4_LegacyV4Only(t *testing.T) {
+	n := &nodeRecord{ServerIP: "192.168.1.1"}
+	if !nodeSupportsV4(n) {
+		t.Fatal("legacy v4 ip in server_ip must support v4")
+	}
+	if nodeSupportsV6(n) {
+		t.Fatal("legacy v4 ip in server_ip must not support v6")
+	}
+}
+
+func TestNodeSupportsV6_LegacyV6Only(t *testing.T) {
+	n := &nodeRecord{ServerIP: "2001:db8::1"}
+	if !nodeSupportsV6(n) {
+		t.Fatal("legacy v6 ip in server_ip must support v6")
+	}
+	if nodeSupportsV4(n) {
+		t.Fatal("legacy v6 ip in server_ip must not support v4")
+	}
+}
+
+func TestNodeSupportsV4_EmptyNode(t *testing.T) {
+	n := &nodeRecord{}
+	if nodeSupportsV4(n) {
+		t.Fatal("empty node must not support v4")
+	}
+	if nodeSupportsV6(n) {
+		t.Fatal("empty node must not support v6")
+	}
+}
+
+func TestNodeSupportsV4_LegacyBracketed(t *testing.T) {
+	n := &nodeRecord{ServerIP: "[::1]"}
+	if nodeSupportsV4(n) {
+		t.Fatal("bracketed ipv6 must not support v4")
+	}
+	if !nodeSupportsV6(n) {
+		t.Fatal("bracketed ipv6 must support v6")
+	}
+}
+
+// ---------------------------------------------------------------------------
+// pickNodeAddressV4 / pickNodeAddressV6
+// ---------------------------------------------------------------------------
+
+func TestPickNodeAddressV4_Nil(t *testing.T) {
+	if pickNodeAddressV4(nil) != "" {
+		t.Fatal("nil node must return empty")
+	}
+}
+
+func TestPickNodeAddressV6_Nil(t *testing.T) {
+	if pickNodeAddressV6(nil) != "" {
+		t.Fatal("nil node must return empty")
+	}
+}
+
+func TestPickNodeAddressV4_PreferExplicit(t *testing.T) {
+	n := &nodeRecord{ServerIPv4: "10.0.0.1", ServerIP: "192.168.0.1"}
+	got := pickNodeAddressV4(n)
+	if got != "10.0.0.1" {
+		t.Fatalf("expected explicit v4 10.0.0.1, got %q", got)
+	}
+}
+
+func TestPickNodeAddressV4_FallbackLegacy(t *testing.T) {
+	n := &nodeRecord{ServerIP: "192.168.0.1"}
+	got := pickNodeAddressV4(n)
+	if got != "192.168.0.1" {
+		t.Fatalf("expected legacy 192.168.0.1, got %q", got)
+	}
+}
+
+func TestPickNodeAddressV6_PreferExplicit(t *testing.T) {
+	n := &nodeRecord{ServerIPv6: "2001:db8::1", ServerIP: "::1"}
+	got := pickNodeAddressV6(n)
+	if got != "2001:db8::1" {
+		t.Fatalf("expected explicit v6 2001:db8::1, got %q", got)
+	}
+}
+
+func TestPickNodeAddressV6_FallbackLegacy(t *testing.T) {
+	n := &nodeRecord{ServerIP: "::1"}
+	got := pickNodeAddressV6(n)
+	if got != "::1" {
+		t.Fatalf("expected legacy ::1, got %q", got)
+	}
+}
+
+// ---------------------------------------------------------------------------
+// selectTunnelDialHost — core IP preference selection logic
+// ---------------------------------------------------------------------------
+
+func dualStackNode(name, v4, v6 string) *nodeRecord {
+	return &nodeRecord{
+		Name:       name,
+		ServerIPv4: v4,
+		ServerIPv6: v6,
+	}
+}
+
+func v4OnlyNode(name, v4 string) *nodeRecord {
+	return &nodeRecord{
+		Name:       name,
+		ServerIPv4: v4,
+	}
+}
+
+func v6OnlyNode(name, v6 string) *nodeRecord {
+	return &nodeRecord{
+		Name:       name,
+		ServerIPv6: v6,
+	}
+}
+
+func TestSelectTunnelDialHost_NilNodes(t *testing.T) {
+	_, err := selectTunnelDialHost(nil, nil, "")
+	if err == nil {
+		t.Fatal("expected error for nil nodes")
+	}
+	_, err = selectTunnelDialHost(dualStackNode("a", "1.1.1.1", "::1"), nil, "")
+	if err == nil {
+		t.Fatal("expected error for nil toNode")
+	}
+	_, err = selectTunnelDialHost(nil, dualStackNode("b", "1.1.1.1", "::1"), "")
+	if err == nil {
+		t.Fatal("expected error for nil fromNode")
+	}
+}
+
+func TestSelectTunnelDialHost_DualStack_DefaultPreference(t *testing.T) {
+	from := dualStackNode("from", "10.0.0.1", "2001:db8::1")
+	to := dualStackNode("to", "10.0.0.2", "2001:db8::2")
+
+	host, err := selectTunnelDialHost(from, to, "")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	// Default prefers v4 when both available
+	if host != "10.0.0.2" {
+		t.Fatalf("default preference should pick v4, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_DualStack_PreferV4(t *testing.T) {
+	from := dualStackNode("from", "10.0.0.1", "2001:db8::1")
+	to := dualStackNode("to", "10.0.0.2", "2001:db8::2")
+
+	host, err := selectTunnelDialHost(from, to, "v4")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "10.0.0.2" {
+		t.Fatalf("v4 preference should pick v4 address, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_DualStack_PreferV6(t *testing.T) {
+	from := dualStackNode("from", "10.0.0.1", "2001:db8::1")
+	to := dualStackNode("to", "10.0.0.2", "2001:db8::2")
+
+	host, err := selectTunnelDialHost(from, to, "v6")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "2001:db8::2" {
+		t.Fatalf("v6 preference should pick v6 address, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_V4Only_PreferV6Fallback(t *testing.T) {
+	from := v4OnlyNode("from", "10.0.0.1")
+	to := v4OnlyNode("to", "10.0.0.2")
+
+	// User prefers v6, but both nodes are v4-only — should fallback to v4
+	host, err := selectTunnelDialHost(from, to, "v6")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "10.0.0.2" {
+		t.Fatalf("v6 preference on v4-only nodes should fallback to v4, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_V6Only_PreferV4Fallback(t *testing.T) {
+	from := v6OnlyNode("from", "2001:db8::1")
+	to := v6OnlyNode("to", "2001:db8::2")
+
+	// User prefers v4, but both nodes are v6-only — should fallback to v6
+	host, err := selectTunnelDialHost(from, to, "v4")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "2001:db8::2" {
+		t.Fatalf("v4 preference on v6-only nodes should fallback to v6, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_Incompatible(t *testing.T) {
+	from := v4OnlyNode("from", "10.0.0.1")
+	to := v6OnlyNode("to", "2001:db8::2")
+
+	_, err := selectTunnelDialHost(from, to, "")
+	if err == nil {
+		t.Fatal("expected error for incompatible nodes (v4-only -> v6-only)")
+	}
+}
+
+func TestSelectTunnelDialHost_Incompatible_Reverse(t *testing.T) {
+	from := v6OnlyNode("from", "2001:db8::1")
+	to := v4OnlyNode("to", "10.0.0.2")
+
+	_, err := selectTunnelDialHost(from, to, "")
+	if err == nil {
+		t.Fatal("expected error for incompatible nodes (v6-only -> v4-only)")
+	}
+}
+
+func TestSelectTunnelDialHost_WhitespacePreference(t *testing.T) {
+	from := dualStackNode("from", "10.0.0.1", "2001:db8::1")
+	to := dualStackNode("to", "10.0.0.2", "2001:db8::2")
+
+	// Whitespace should be trimmed, treated as "v6"
+	host, err := selectTunnelDialHost(from, to, "  v6  ")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "2001:db8::2" {
+		t.Fatalf("trimmed v6 preference should pick v6 address, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_MixedStack_FromDualToV4(t *testing.T) {
+	from := dualStackNode("from", "10.0.0.1", "2001:db8::1")
+	to := v4OnlyNode("to", "10.0.0.2")
+
+	// v6 preferred, but target only has v4 — should succeed with v4
+	host, err := selectTunnelDialHost(from, to, "v6")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "10.0.0.2" {
+		t.Fatalf("should fallback to v4 when target is v4-only, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_MixedStack_FromDualToV6(t *testing.T) {
+	from := dualStackNode("from", "10.0.0.1", "2001:db8::1")
+	to := v6OnlyNode("to", "2001:db8::2")
+
+	// v4 preferred, but target only has v6 — should succeed with v6
+	host, err := selectTunnelDialHost(from, to, "v4")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "2001:db8::2" {
+		t.Fatalf("should fallback to v6 when target is v6-only, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_MixedStack_FromV4ToDual(t *testing.T) {
+	from := v4OnlyNode("from", "10.0.0.1")
+	to := dualStackNode("to", "10.0.0.2", "2001:db8::2")
+
+	// v6 preferred, but from only has v4 — should use v4 (from can only reach v4 of target)
+	host, err := selectTunnelDialHost(from, to, "v6")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "10.0.0.2" {
+		t.Fatalf("should use v4 when from is v4-only, got %q", host)
+	}
+}
+
+func TestSelectTunnelDialHost_MixedStack_FromV6ToDual(t *testing.T) {
+	from := v6OnlyNode("from", "2001:db8::1")
+	to := dualStackNode("to", "10.0.0.2", "2001:db8::2")
+
+	// v4 preferred, but from only has v6 — should use v6
+	host, err := selectTunnelDialHost(from, to, "v4")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if host != "2001:db8::2" {
+		t.Fatalf("should use v6 when from is v6-only, got %q", host)
+	}
+}
+
+// ---------------------------------------------------------------------------
+// nodeDisplayName
+// ---------------------------------------------------------------------------
+
+func TestNodeDisplayName_Nil(t *testing.T) {
+	got := nodeDisplayName(nil)
+	if got != "node" {
+		t.Fatalf("nil node display name should be 'node', got %q", got)
+	}
+}
+
+func TestNodeDisplayName_Named(t *testing.T) {
+	n := &nodeRecord{ID: 42, Name: "hk-node"}
+	got := nodeDisplayName(n)
+	if got != "hk-node" {
+		t.Fatalf("expected 'hk-node', got %q", got)
+	}
+}
+
+func TestNodeDisplayName_Unnamed(t *testing.T) {
+	n := &nodeRecord{ID: 42}
+	got := nodeDisplayName(n)
+	if got != "node_42" {
+		t.Fatalf("expected 'node_42', got %q", got)
+	}
+}

go-backend/internal/http/handler/federation.go

@@ -299,13 +299,20 @@ func (h *Handler) federationShareDelete(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	share, _ := h.repo.GetPeerShare(req.ID)
+
 	h.cleanupPeerShareRuntimes(req.ID)
+	h.cleanupFederationTunnels(req.ID)
 
 	if err := h.repo.DeletePeerShare(req.ID); err != nil {
 		response.WriteJSON(w, response.Err(-2, err.Error()))
 		return
 	}
 
+	if share != nil && h.wsServer != nil {
+		h.wsServer.SendCommand(share.NodeID, "reload", nil, time.Second*5)
+	}
+
 	response.WriteJSON(w, response.OKEmpty())
 }
 
@@ -544,6 +551,28 @@ func (h *Handler) federationRemoteUsageList(w http.ResponseWriter, r *http.Reque
 	response.WriteJSON(w, response.OK(items))
 }
 
+func remoteNodePortRange(node *nodeRecord) (int, int) {
+	if node == nil || node.IsRemote != 1 || node.RemoteConfig == "" {
+		return 0, 0
+	}
+	_, _, _, _, portRangeStart, portRangeEnd := parseRemoteShareUsageConfig(node.RemoteConfig)
+	return portRangeStart, portRangeEnd
+}
+
+func validateRemoteNodePort(node *nodeRecord, port int) error {
+	if node == nil || node.IsRemote != 1 || port <= 0 {
+		return nil
+	}
+	start, end := remoteNodePortRange(node)
+	if start <= 0 || end <= 0 {
+		return nil
+	}
+	if port < start || port > end {
+		return fmt.Errorf("远程节点端口 %d 超出允许范围 %d-%d", port, start, end)
+	}
+	return nil
+}
+
 func parseRemoteShareUsageConfig(raw string) (int64, int64, int64, int64, int, int) {
 	raw = strings.TrimSpace(raw)
 	if raw == "" {
@@ -980,6 +1009,13 @@ func (h *Handler) federationRuntimeApplyRole(w http.ResponseWriter, r *http.Requ
 		return
 	}
 
+	if share.PortRangeStart > 0 && share.PortRangeEnd > 0 && runtime.Port > 0 {
+		if runtime.Port < share.PortRangeStart || runtime.Port > share.PortRangeEnd {
+			response.WriteJSON(w, response.Err(403, fmt.Sprintf("port %d out of allowed range %d-%d", runtime.Port, share.PortRangeStart, share.PortRangeEnd)))
+			return
+		}
+	}
+
 	node, err := h.getNodeRecord(share.NodeID)
 	if err != nil {
 		response.WriteJSON(w, response.ErrDefault(err.Error()))
@@ -1271,35 +1307,35 @@ func validateFederationCommandPorts(share *sqlite.PeerShare, data interface{}) e
 	if !ok {
 		return nil
 	}
-	services, ok := dataMap["services"]
-	if !ok {
-		return nil
-	}
-	serviceList, ok := services.([]interface{})
-	if !ok {
-		return nil
-	}
-	for _, svc := range serviceList {
-		svcMap, ok := svc.(map[string]interface{})
+
+	if services, ok := dataMap["services"]; ok {
+		serviceList, ok := services.([]interface{})
 		if !ok {
-			continue
+			return fmt.Errorf("invalid services format")
 		}
-		addr, ok := svcMap["addr"].(string)
-		if !ok || addr == "" {
-			continue
-		}
-		_, portStr, err := net.SplitHostPort(addr)
-		if err != nil {
-			continue
-		}
-		port, err := strconv.Atoi(portStr)
-		if err != nil || port <= 0 {
-			continue
-		}
-		if port < share.PortRangeStart || port > share.PortRangeEnd {
-			return fmt.Errorf("port %d out of allowed range %d-%d", port, share.PortRangeStart, share.PortRangeEnd)
+		for _, svc := range serviceList {
+			svcMap, ok := svc.(map[string]interface{})
+			if !ok {
+				return fmt.Errorf("invalid service entry format")
+			}
+			addr, ok := svcMap["addr"].(string)
+			if !ok || addr == "" {
+				continue
+			}
+			_, portStr, err := net.SplitHostPort(addr)
+			if err != nil {
+				return fmt.Errorf("invalid service address: %s", addr)
+			}
+			port, err := strconv.Atoi(portStr)
+			if err != nil || port <= 0 {
+				return fmt.Errorf("invalid port in service address: %s", addr)
+			}
+			if port < share.PortRangeStart || port > share.PortRangeEnd {
+				return fmt.Errorf("port %d out of allowed range %d-%d", port, share.PortRangeStart, share.PortRangeEnd)
+			}
 		}
 	}
+
 	return nil
 }
 
@@ -1613,3 +1649,27 @@ func (h *Handler) cleanupPeerShareRuntimes(shareID int64) {
 		_ = h.repo.MarkPeerShareRuntimeReleased(runtime.ID, now)
 	}
 }
+
+func (h *Handler) cleanupFederationTunnels(shareID int64) {
+	if h == nil || h.repo == nil || shareID <= 0 {
+		return
+	}
+	namePrefix := fmt.Sprintf("Share-%d-Port-", shareID)
+	rows, err := h.repo.DB().Query(`SELECT id FROM tunnel WHERE name LIKE ?`, namePrefix+"%")
+	if err != nil {
+		return
+	}
+	defer rows.Close()
+
+	var tunnelIDs []int64
+	for rows.Next() {
+		var id int64
+		if err := rows.Scan(&id); err == nil {
+			tunnelIDs = append(tunnelIDs, id)
+		}
+	}
+
+	for _, tid := range tunnelIDs {
+		_ = h.deleteTunnelByID(tid)
+	}
+}

go-backend/internal/http/handler/federation_runtime_test.go

@@ -56,14 +56,35 @@ func TestPickPeerSharePortUsesRuntimeReservations(t *testing.T) {
 	}
 }
 
-func TestApplyTunnelRuntimeSkipsRemoteNodes(t *testing.T) {
-	h := &Handler{}
+func TestApplyTunnelRuntimeSkipsRemoteChainAndOutNodes(t *testing.T) {
+	repo, err := sqlite.Open(filepath.Join(t.TempDir(), "rt-skip.db"))
+	if err != nil {
+		t.Fatalf("open repo: %v", err)
+	}
+	defer repo.Close()
+
+	h := &Handler{repo: repo}
+	now := time.Now().UnixMilli()
+	for _, n := range []struct {
+		id   int64
+		name string
+		ip   string
+	}{
+		{12, "remote-chain", "10.99.0.2"},
+		{13, "remote-out", "10.99.0.3"},
+	} {
+		if _, err := repo.DB().Exec(`
+			INSERT INTO node(id, name, secret, server_ip, server_ip_v4, server_ip_v6, port, interface_name, version, http, tls, socks, created_time, updated_time, status, tcp_listen_addr, udp_listen_addr, inx, is_remote, remote_url, remote_token)
+			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		`, n.id, n.name, n.name+"-secret", n.ip, n.ip, "", "40000-40010", "", "v1", 1, 1, 1, now, now, 1, "[::]", "[::]", 0, 1, "http://remote-peer", "remote-token"); err != nil {
+			t.Fatalf("insert node %s: %v", n.name, err)
+		}
+	}
+
 	state := &tunnelCreateState{
 		TunnelID: 1,
 		Type:     2,
-		InNodes: []tunnelRuntimeNode{
-			{NodeID: 11, ChainType: 1, Protocol: "tls"},
-		},
+		InNodes:  []tunnelRuntimeNode{},
 		ChainHops: [][]tunnelRuntimeNode{
 			{
 				{NodeID: 12, ChainType: 2, Inx: 1, Port: 41000, Protocol: "tls", Strategy: "round"},
@@ -73,9 +94,8 @@ func TestApplyTunnelRuntimeSkipsRemoteNodes(t *testing.T) {
 			{NodeID: 13, ChainType: 3, Port: 42000, Protocol: "tls", Strategy: "round"},
 		},
 		Nodes: map[int64]*nodeRecord{
-			11: {ID: 11, Name: "remote-in", IsRemote: 1},
-			12: {ID: 12, Name: "remote-chain", IsRemote: 1},
-			13: {ID: 13, Name: "remote-out", IsRemote: 1},
+			12: {ID: 12, Name: "remote-chain", IsRemote: 1, ServerIPv4: "10.99.0.2"},
+			13: {ID: 13, Name: "remote-out", IsRemote: 1, ServerIPv4: "10.99.0.3"},
 		},
 	}
 
@@ -84,10 +104,10 @@ func TestApplyTunnelRuntimeSkipsRemoteNodes(t *testing.T) {
 		t.Fatalf("apply runtime: %v", err)
 	}
 	if len(chains) != 0 {
-		t.Fatalf("expected no local chains created, got %d", len(chains))
+		t.Fatalf("expected no local chains for remote-only nodes, got %d", len(chains))
 	}
 	if len(services) != 0 {
-		t.Fatalf("expected no local services created, got %d", len(services))
+		t.Fatalf("expected no local services for remote-only nodes, got %d", len(services))
 	}
 }
 

go-backend/internal/http/handler/handler.go

@@ -177,6 +177,8 @@ func (h *Handler) Register(mux *http.ServeMux) {
 	mux.HandleFunc("/api/v1/federation/runtime/diagnose", h.authPeer(h.federationRuntimeDiagnose))
 	mux.HandleFunc("/api/v1/federation/runtime/command", h.authPeer(h.federationRuntimeCommand))
 	mux.HandleFunc("/api/v1/federation/node/import", h.nodeImport)
+	mux.HandleFunc("/api/v1/announcement/get", h.getAnnouncement)
+	mux.HandleFunc("/api/v1/announcement/update", h.updateAnnouncement)
 
 	mux.HandleFunc("/flow/test", h.flowTest)
 	mux.HandleFunc("/flow/config", h.flowConfig)
@@ -1228,3 +1230,53 @@ func (h *Handler) backupImport(w http.ResponseWriter, r *http.Request) {
 	result.AutoBackup = autoBackup
 	response.WriteJSON(w, response.OK(result))
 }
+
+func (h *Handler) getAnnouncement(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		response.WriteJSON(w, response.ErrDefault("请求失败"))
+		return
+	}
+
+	ann, err := h.repo.GetAnnouncement()
+	if err != nil {
+		response.WriteJSON(w, response.Err(-1, fmt.Sprintf("获取公告失败: %v", err)))
+		return
+	}
+
+	if ann == nil {
+		response.WriteJSON(w, response.OK(map[string]interface{}{
+			"content": "",
+			"enabled": 0,
+		}))
+		return
+	}
+
+	response.WriteJSON(w, response.OK(map[string]interface{}{
+		"content": ann.Content,
+		"enabled": ann.Enabled,
+	}))
+}
+
+func (h *Handler) updateAnnouncement(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		response.WriteJSON(w, response.ErrDefault("请求失败"))
+		return
+	}
+
+	var req struct {
+		Content string `json:"content"`
+		Enabled int    `json:"enabled"`
+	}
+	if err := decodeJSON(r.Body, &req); err != nil {
+		response.WriteJSON(w, response.Err(500, "请求参数错误"))
+		return
+	}
+
+	now := time.Now().UnixMilli()
+	if err := h.repo.UpsertAnnouncement(req.Content, req.Enabled, now); err != nil {
+		response.WriteJSON(w, response.Err(-1, fmt.Sprintf("更新公告失败: %v", err)))
+		return
+	}
+
+	response.WriteJSON(w, response.OKEmpty())
+}

go-backend/internal/http/handler/mutations.go

@@ -497,6 +497,7 @@ func (h *Handler) tunnelCreate(w http.ResponseWriter, r *http.Request) {
 	status := asInt(req["status"], 1)
 	trafficRatio := asFloat(req["trafficRatio"], 1.0)
 	inIP := asString(req["inIp"])
+	ipPreference := asString(req["ipPreference"])
 	now := time.Now().UnixMilli()
 	inx := nextIndex(h.repo.DB(), "tunnel")
 
@@ -512,6 +513,7 @@ func (h *Handler) tunnelCreate(w http.ResponseWriter, r *http.Request) {
 		response.WriteJSON(w, response.ErrDefault(err.Error()))
 		return
 	}
+	runtimeState.IPPreference = ipPreference
 	if strings.TrimSpace(inIP) == "" {
 		inIP = buildTunnelInIP(runtimeState.InNodes, runtimeState.Nodes)
 	}
@@ -545,6 +547,11 @@ func (h *Handler) tunnelCreate(w http.ResponseWriter, r *http.Request) {
 				}
 
 				if targetPort > 0 && targetAddr != "" {
+					inNodeRec := runtimeState.Nodes[firstNodeID]
+					if err := validateRemoteNodePort(inNodeRec, targetPort); err != nil {
+						response.WriteJSON(w, response.ErrDefault(err.Error()))
+						return
+					}
 					domainCfg, _ := h.repo.GetConfigByName("panel_domain")
 					localDomain := ""
 					if domainCfg != nil {
@@ -560,8 +567,8 @@ func (h *Handler) tunnelCreate(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	tunnelID, err := tx.ExecReturningID(`INSERT INTO tunnel(name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
-		name, trafficRatio, typeVal, "tls", flow, now, now, status, nullableText(inIP), inx)
+	tunnelID, err := tx.ExecReturningID(`INSERT INTO tunnel(name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx, ip_preference) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+		name, trafficRatio, typeVal, "tls", flow, now, now, status, nullableText(inIP), inx, ipPreference)
 	if err != nil {
 		response.WriteJSON(w, response.Err(-2, err.Error()))
 		return
@@ -672,6 +679,7 @@ func (h *Handler) tunnelUpdate(w http.ResponseWriter, r *http.Request) {
 
 	now := time.Now().UnixMilli()
 	typeVal := asInt(req["type"], 1)
+	ipPreference := asString(req["ipPreference"])
 
 	tx, err := h.repo.DB().Begin()
 	if err != nil {
@@ -686,6 +694,7 @@ func (h *Handler) tunnelUpdate(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	runtimeState.TunnelID = id
+	runtimeState.IPPreference = ipPreference
 
 	inIp := buildTunnelInIP(runtimeState.InNodes, runtimeState.Nodes)
 
@@ -698,8 +707,8 @@ func (h *Handler) tunnelUpdate(w http.ResponseWriter, r *http.Request) {
 	}
 	applyTunnelPortsToRequest(req, runtimeState)
 
-	_, err = tx.Exec(`UPDATE tunnel SET name=?, type=?, flow=?, traffic_ratio=?, status=?, in_ip=?, updated_time=? WHERE id=?`,
-		asString(req["name"]), typeVal, asInt64(req["flow"], 1), asFloat(req["trafficRatio"], 1.0), asInt(req["status"], 1), nullableText(inIp), now, id)
+	_, err = tx.Exec(`UPDATE tunnel SET name=?, type=?, flow=?, traffic_ratio=?, status=?, in_ip=?, ip_preference=?, updated_time=? WHERE id=?`,
+		asString(req["name"]), typeVal, asInt64(req["flow"], 1), asFloat(req["trafficRatio"], 1.0), asInt(req["status"], 1), nullableText(inIp), ipPreference, now, id)
 	if err != nil {
 		response.WriteJSON(w, response.Err(-2, err.Error()))
 		return
@@ -833,14 +842,18 @@ func (h *Handler) reconstructTunnelState(tunnelID int64) (*tunnelCreateState, er
 		return nil, err
 	}
 
+	var ipPreference string
+	_ = h.repo.DB().QueryRow(`SELECT COALESCE(ip_preference, '') FROM tunnel WHERE id = ?`, tunnelID).Scan(&ipPreference)
+
 	state := &tunnelCreateState{
-		TunnelID:   tunnelID,
-		Type:       tunnel.Type,
-		InNodes:    make([]tunnelRuntimeNode, 0),
-		ChainHops:  make([][]tunnelRuntimeNode, 0),
-		OutNodes:   make([]tunnelRuntimeNode, 0),
-		Nodes:      make(map[int64]*nodeRecord),
-		NodeIDList: make([]int64, 0),
+		TunnelID:     tunnelID,
+		Type:         tunnel.Type,
+		IPPreference: ipPreference,
+		InNodes:      make([]tunnelRuntimeNode, 0),
+		ChainHops:    make([][]tunnelRuntimeNode, 0),
+		OutNodes:     make([]tunnelRuntimeNode, 0),
+		Nodes:        make(map[int64]*nodeRecord),
+		NodeIDList:   make([]int64, 0),
 	}
 
 	inNodes, chainHops, outNodes := splitChainNodeGroups(chainRows)
@@ -1105,6 +1118,17 @@ func (h *Handler) forwardCreate(w http.ResponseWriter, r *http.Request) {
 	if port <= 0 {
 		port = 10000
 	}
+	entryNodes, _ := h.tunnelEntryNodeIDs(tunnelID)
+	for _, nodeID := range entryNodes {
+		node, nodeErr := h.getNodeRecord(nodeID)
+		if nodeErr != nil {
+			continue
+		}
+		if err := validateRemoteNodePort(node, port); err != nil {
+			response.WriteJSON(w, response.ErrDefault(err.Error()))
+			return
+		}
+	}
 	now := time.Now().UnixMilli()
 	inx := nextIndex(h.repo.DB(), "forward")
 	var userName string
@@ -1126,7 +1150,6 @@ func (h *Handler) forwardCreate(w http.ResponseWriter, r *http.Request) {
 		response.WriteJSON(w, response.Err(-2, err.Error()))
 		return
 	}
-	entryNodes, _ := h.tunnelEntryNodeIDs(tunnelID)
 	for _, nodeID := range entryNodes {
 		_, _ = tx.Exec(`INSERT INTO forward_port(forward_id, node_id, port) VALUES(?, ?, ?)`, forwardID, nodeID, port)
 	}
@@ -1216,6 +1239,17 @@ func (h *Handler) forwardUpdate(w http.ResponseWriter, r *http.Request) {
 			port = h.pickTunnelPort(tunnelID)
 		}
 	}
+	fwdEntryNodes, _ := h.tunnelEntryNodeIDs(tunnelID)
+	for _, nodeID := range fwdEntryNodes {
+		node, nodeErr := h.getNodeRecord(nodeID)
+		if nodeErr != nil {
+			continue
+		}
+		if err := validateRemoteNodePort(node, port); err != nil {
+			response.WriteJSON(w, response.ErrDefault(err.Error()))
+			return
+		}
+	}
 	now := time.Now().UnixMilli()
 	_, err = h.repo.DB().Exec(`
 		UPDATE forward SET name = ?, tunnel_id = ?, remote_addr = ?, strategy = ?, updated_time = ? WHERE id = ?
@@ -1540,6 +1574,22 @@ func (h *Handler) forwardBatchChangeTunnel(w http.ResponseWriter, r *http.Reques
 		if p <= 0 {
 			p = h.pickTunnelPort(req.TargetTunnelID)
 		}
+		bctEntryNodes, _ := h.tunnelEntryNodeIDs(req.TargetTunnelID)
+		portRangeOk := true
+		for _, nid := range bctEntryNodes {
+			nd, ndErr := h.getNodeRecord(nid)
+			if ndErr != nil {
+				continue
+			}
+			if validateRemoteNodePort(nd, p) != nil {
+				portRangeOk = false
+				break
+			}
+		}
+		if !portRangeOk {
+			fail++
+			continue
+		}
 		if err := h.replaceForwardPorts(id, req.TargetTunnelID, p); err != nil {
 			h.rollbackForwardMutation(forward, oldPorts)
 			fail++
@@ -2103,13 +2153,14 @@ type tunnelRuntimeNode struct {
 }
 
 type tunnelCreateState struct {
-	TunnelID   int64
-	Type       int
-	InNodes    []tunnelRuntimeNode
-	ChainHops  [][]tunnelRuntimeNode
-	OutNodes   []tunnelRuntimeNode
-	Nodes      map[int64]*nodeRecord
-	NodeIDList []int64
+	TunnelID     int64
+	Type         int
+	IPPreference string // "" = auto, "v4" = prefer IPv4, "v6" = prefer IPv6
+	InNodes      []tunnelRuntimeNode
+	ChainHops    [][]tunnelRuntimeNode
+	OutNodes     []tunnelRuntimeNode
+	Nodes        map[int64]*nodeRecord
+	NodeIDList   []int64
 }
 
 func (h *Handler) prepareTunnelCreateState(tx *store.Tx, req map[string]interface{}, tunnelType int, excludeTunnelID int64) (*tunnelCreateState, error) {
@@ -2235,6 +2286,19 @@ func (h *Handler) prepareTunnelCreateState(tx *store.Tx, req map[string]interfac
 		state.Nodes[nodeID] = node
 	}
 
+	for _, outNode := range state.OutNodes {
+		if err := validateRemoteNodePort(state.Nodes[outNode.NodeID], outNode.Port); err != nil {
+			return nil, err
+		}
+	}
+	for _, hop := range state.ChainHops {
+		for _, chainNode := range hop {
+			if err := validateRemoteNodePort(state.Nodes[chainNode.NodeID], chainNode.Port); err != nil {
+				return nil, err
+			}
+		}
+	}
+
 	return state, nil
 }
 
@@ -2458,7 +2522,7 @@ func (h *Handler) applyFederationRuntime(state *tunnelCreateState) ([]sqlite.Fed
 					h.releaseFederationRuntimeRefs(releaseRefs)
 					return nil, nil, errors.New("节点不存在")
 				}
-				host, hostErr := selectTunnelDialHost(node, targetNode)
+				host, hostErr := selectTunnelDialHost(node, targetNode, state.IPPreference)
 				if hostErr != nil {
 					h.releaseFederationRuntimeRefs(releaseRefs)
 					return nil, nil, hostErr
@@ -2614,7 +2678,7 @@ func (h *Handler) applyTunnelRuntime(state *tunnelCreateState) ([]int64, []int64
 		if len(state.ChainHops) > 0 {
 			targets = state.ChainHops[0]
 		}
-		chainData, err := buildTunnelChainConfig(state.TunnelID, inNode.NodeID, targets, state.Nodes)
+		chainData, err := buildTunnelChainConfig(state.TunnelID, inNode.NodeID, targets, state.Nodes, state.IPPreference)
 		if err != nil {
 			return createdChains, createdServices, err
 		}
@@ -2636,7 +2700,7 @@ func (h *Handler) applyTunnelRuntime(state *tunnelCreateState) ([]int64, []int64
 			if node := state.Nodes[chainNode.NodeID]; node != nil && node.IsRemote == 1 {
 				continue
 			}
-			chainData, err := buildTunnelChainConfig(state.TunnelID, chainNode.NodeID, nextTargets, state.Nodes)
+			chainData, err := buildTunnelChainConfig(state.TunnelID, chainNode.NodeID, nextTargets, state.Nodes, state.IPPreference)
 			if err != nil {
 				return createdChains, createdServices, err
 			}
@@ -2711,7 +2775,7 @@ func shouldDeferTunnelRuntimeApplyError(err error) bool {
 	return false
 }
 
-func buildTunnelChainConfig(tunnelID int64, fromNodeID int64, targets []tunnelRuntimeNode, nodes map[int64]*nodeRecord) (map[string]interface{}, error) {
+func buildTunnelChainConfig(tunnelID int64, fromNodeID int64, targets []tunnelRuntimeNode, nodes map[int64]*nodeRecord, ipPreference string) (map[string]interface{}, error) {
 	fromNode := nodes[fromNodeID]
 	if fromNode == nil {
 		return nil, errors.New("节点不存在")
@@ -2725,7 +2789,7 @@ func buildTunnelChainConfig(tunnelID int64, fromNodeID int64, targets []tunnelRu
 		if targetNode == nil {
 			return nil, errors.New("节点不存在")
 		}
-		host, err := selectTunnelDialHost(fromNode, targetNode)
+		host, err := selectTunnelDialHost(fromNode, targetNode, ipPreference)
 		if err != nil {
 			return nil, err
 		}
@@ -2798,7 +2862,7 @@ func buildTunnelChainServiceConfig(tunnelID int64, chainNode tunnelRuntimeNode,
 	return []map[string]interface{}{service}
 }
 
-func selectTunnelDialHost(fromNode, toNode *nodeRecord) (string, error) {
+func selectTunnelDialHost(fromNode, toNode *nodeRecord, ipPreference string) (string, error) {
 	if fromNode == nil || toNode == nil {
 		return "", errors.New("节点不存在")
 	}
@@ -2807,16 +2871,39 @@ func selectTunnelDialHost(fromNode, toNode *nodeRecord) (string, error) {
 	toV4 := nodeSupportsV4(toNode)
 	toV6 := nodeSupportsV6(toNode)
 
-	if fromV4 && toV4 {
-		host := pickNodeAddressV4(toNode)
-		if host != "" {
-			return host, nil
+	switch strings.TrimSpace(ipPreference) {
+	case "v6":
+		if fromV6 && toV6 {
+			if host := pickNodeAddressV6(toNode); host != "" {
+				return host, nil
+			}
 		}
-	}
-	if fromV6 && toV6 {
-		host := pickNodeAddressV6(toNode)
-		if host != "" {
-			return host, nil
+		if fromV4 && toV4 {
+			if host := pickNodeAddressV4(toNode); host != "" {
+				return host, nil
+			}
+		}
+	case "v4":
+		if fromV4 && toV4 {
+			if host := pickNodeAddressV4(toNode); host != "" {
+				return host, nil
+			}
+		}
+		if fromV6 && toV6 {
+			if host := pickNodeAddressV6(toNode); host != "" {
+				return host, nil
+			}
+		}
+	default:
+		if fromV4 && toV4 {
+			if host := pickNodeAddressV4(toNode); host != "" {
+				return host, nil
+			}
+		}
+		if fromV6 && toV6 {
+			if host := pickNodeAddressV6(toNode); host != "" {
+				return host, nil
+			}
 		}
 	}
 	return "", fmt.Errorf("节点链路不兼容：%s(v4=%t,v6=%t) -> %s(v4=%t,v6=%t)", nodeDisplayName(fromNode), fromV4, fromV6, nodeDisplayName(toNode), toV4, toV6)

go-backend/internal/http/middleware/auth.go

@@ -137,6 +137,8 @@ func requiresAdmin(path string) bool {
 		return true
 	case "/api/v1/config/update", "/api/v1/config/update-single":
 		return true
+	case "/api/v1/announcement/update":
+		return true
 	default:
 		return false
 	}

go-backend/internal/store/postgres/sql/schema.sql

@@ -239,3 +239,11 @@ CREATE TABLE IF NOT EXISTS federation_tunnel_binding (
 
 CREATE UNIQUE INDEX IF NOT EXISTS idx_federation_tunnel_binding_unique ON federation_tunnel_binding(tunnel_id, node_id, chain_type, hop_inx);
 CREATE INDEX IF NOT EXISTS idx_federation_tunnel_binding_tunnel ON federation_tunnel_binding(tunnel_id, status);
+
+CREATE TABLE IF NOT EXISTS announcement (
+  id SERIAL PRIMARY KEY,
+  content TEXT NOT NULL,
+  enabled INTEGER NOT NULL DEFAULT 1,
+  created_time BIGINT NOT NULL,
+  updated_time BIGINT
+);

go-backend/internal/store/sqlite/repository.go

@@ -66,6 +66,14 @@ type ViteConfig struct {
 	Time  int64  `json:"time"`
 }
 
+type Announcement struct {
+	ID          int64         `json:"id"`
+	Content     string        `json:"content"`
+	Enabled     int           `json:"enabled"`
+	CreatedTime int64         `json:"created_time"`
+	UpdatedTime sql.NullInt64 `json:"updated_time,omitempty"`
+}
+
 type UserTunnelDetail struct {
 	ID            int64
 	UserID        int64
@@ -319,6 +327,46 @@ func (r *Repository) UpsertConfig(name, value string, now int64) error {
 	return err
 }
 
+func (r *Repository) GetAnnouncement() (*Announcement, error) {
+	if r == nil || r.db == nil {
+		return nil, errors.New("repository not initialized")
+	}
+
+	row := r.db.QueryRow(`SELECT id, content, enabled, created_time, updated_time FROM announcement ORDER BY id DESC LIMIT 1`)
+	ann := &Announcement{}
+	if err := row.Scan(&ann.ID, &ann.Content, &ann.Enabled, &ann.CreatedTime, &ann.UpdatedTime); err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return ann, nil
+}
+
+func (r *Repository) UpsertAnnouncement(content string, enabled int, now int64) error {
+	if r == nil || r.db == nil {
+		return errors.New("repository not initialized")
+	}
+
+	var count int
+	err := r.db.QueryRow(`SELECT COUNT(*) FROM announcement`).Scan(&count)
+	if err != nil {
+		return err
+	}
+
+	if count == 0 {
+		_, err = r.db.Exec(`
+			INSERT INTO announcement(content, enabled, created_time, updated_time)
+			VALUES(?, ?, ?, ?)
+		`, content, enabled, now, now)
+	} else {
+		_, err = r.db.Exec(`
+			UPDATE announcement SET content = ?, enabled = ?, updated_time = ?
+		`, content, enabled, now)
+	}
+	return err
+}
+
 func (r *Repository) GetUserByID(id int64) (*User, error) {
 	if r == nil || r.db == nil {
 		return nil, errors.New("repository not initialized")
@@ -849,7 +897,7 @@ func (r *Repository) ListTunnels() ([]map[string]interface{}, error) {
 	}
 
 	rows, err := r.db.Query(`
-		SELECT id, inx, name, type, flow, traffic_ratio, status, created_time, in_ip
+		SELECT id, inx, name, type, flow, traffic_ratio, status, created_time, in_ip, COALESCE(ip_preference, '')
 		FROM tunnel
 		ORDER BY inx ASC, id ASC
 	`)
@@ -867,7 +915,8 @@ func (r *Repository) ListTunnels() ([]map[string]interface{}, error) {
 		var typ, status int
 		var trafficRatio float64
 		var inIP sql.NullString
-		if err := rows.Scan(&id, &inx, &name, &typ, &flow, &trafficRatio, &status, &createdTime, &inIP); err != nil {
+		var ipPreference string
+		if err := rows.Scan(&id, &inx, &name, &typ, &flow, &trafficRatio, &status, &createdTime, &inIP, &ipPreference); err != nil {
 			return nil, err
 		}
 
@@ -881,6 +930,7 @@ func (r *Repository) ListTunnels() ([]map[string]interface{}, error) {
 			"status":       status,
 			"createdTime":  createdTime,
 			"inIp":         nullableString(inIP),
+			"ipPreference": ipPreference,
 			"inNodeId":     make([]map[string]interface{}, 0),
 			"outNodeId":    make([]map[string]interface{}, 0),
 			"chainNodes":   make([][]map[string]interface{}, 0),
@@ -1366,7 +1416,8 @@ func migrateSchema(db *store.DB) error {
 			"remote_config": "TEXT",
 		},
 		"tunnel": {
-			"inx": "INTEGER NOT NULL DEFAULT 0",
+			"inx":           "INTEGER NOT NULL DEFAULT 0",
+			"ip_preference": "VARCHAR(10) NOT NULL DEFAULT ''",
 		},
 		"forward": {
 			"inx": "INTEGER NOT NULL DEFAULT 0",
@@ -1997,6 +2048,7 @@ type TunnelBackup struct {
 	Status       int                 `json:"status"`
 	InIP         string              `json:"inIp,omitempty"`
 	Inx          int                 `json:"inx"`
+	IPPreference string              `json:"ipPreference,omitempty"`
 	ChainTunnels []ChainTunnelBackup `json:"chainTunnels,omitempty"`
 }
 
@@ -2327,7 +2379,7 @@ func (r *Repository) exportNodes() ([]NodeBackup, error) {
 
 func (r *Repository) exportTunnels() ([]TunnelBackup, error) {
 	rows, err := r.db.Query(`
-		SELECT id, name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx
+		SELECT id, name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx, COALESCE(ip_preference, '')
 		FROM tunnel ORDER BY inx ASC, id ASC
 	`)
 	if err != nil {
@@ -2342,7 +2394,7 @@ func (r *Repository) exportTunnels() ([]TunnelBackup, error) {
 		var updatedTime sql.NullInt64
 		var inIP sql.NullString
 		var inx sql.NullInt64
-		if err := rows.Scan(&t.ID, &t.Name, &t.TrafficRatio, &t.Type, &protocol, &t.Flow, &t.CreatedTime, &updatedTime, &t.Status, &inIP, &inx); err != nil {
+		if err := rows.Scan(&t.ID, &t.Name, &t.TrafficRatio, &t.Type, &protocol, &t.Flow, &t.CreatedTime, &updatedTime, &t.Status, &inIP, &inx, &t.IPPreference); err != nil {
 			return nil, err
 		}
 		if protocol.Valid {
@@ -2826,8 +2878,8 @@ func (r *Repository) importTunnels(db Execer, tunnels []TunnelBackup, now int64)
 	count := 0
 	for _, t := range tunnels {
 		_, err := db.Exec(`
-			INSERT INTO tunnel(id, name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx)
-			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+			INSERT INTO tunnel(id, name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx, ip_preference)
+			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
 			ON CONFLICT(id) DO UPDATE SET
 				name = excluded.name,
 				traffic_ratio = excluded.traffic_ratio,
@@ -2837,8 +2889,9 @@ func (r *Repository) importTunnels(db Execer, tunnels []TunnelBackup, now int64)
 				updated_time = excluded.updated_time,
 				status = excluded.status,
 				in_ip = excluded.in_ip,
-				inx = excluded.inx
-		`, t.ID, t.Name, t.TrafficRatio, t.Type, t.Protocol, t.Flow, t.CreatedTime, now, t.Status, t.InIP, t.Inx)
+				inx = excluded.inx,
+				ip_preference = excluded.ip_preference
+		`, t.ID, t.Name, t.TrafficRatio, t.Type, t.Protocol, t.Flow, t.CreatedTime, now, t.Status, t.InIP, t.Inx, t.IPPreference)
 		if err != nil {
 			return count, err
 		}

go-backend/internal/store/sqlite/sql/schema.sql

@@ -80,7 +80,8 @@ CREATE TABLE IF NOT EXISTS tunnel (
   updated_time INTEGER NOT NULL,
   status INTEGER NOT NULL,
   in_ip TEXT,
-  inx INTEGER NOT NULL DEFAULT 0
+  inx INTEGER NOT NULL DEFAULT 0,
+  ip_preference VARCHAR(10) NOT NULL DEFAULT ''
 );
 
 CREATE TABLE IF NOT EXISTS chain_tunnel (
@@ -243,3 +244,11 @@ CREATE TABLE IF NOT EXISTS federation_tunnel_binding (
 
 CREATE UNIQUE INDEX IF NOT EXISTS idx_federation_tunnel_binding_unique ON federation_tunnel_binding(tunnel_id, node_id, chain_type, hop_inx);
 CREATE INDEX IF NOT EXISTS idx_federation_tunnel_binding_tunnel ON federation_tunnel_binding(tunnel_id, status);
+
+CREATE TABLE IF NOT EXISTS announcement (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  content TEXT NOT NULL,
+  enabled INTEGER NOT NULL DEFAULT 1,
+  created_time INTEGER NOT NULL,
+  updated_time INTEGER
+);

go-backend/tests/contract/tunnel_ip_preference_contract_test.go

@@ -0,0 +1,301 @@
+package contract_test
+
+import (
+	"bytes"
+	"database/sql"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"go-backend/internal/auth"
+	"go-backend/internal/http/response"
+)
+
+func TestTunnelCreateWithIPPreferenceContract(t *testing.T) {
+	secret := "contract-jwt-secret"
+	router, repo := setupContractRouter(t, secret)
+	now := time.Now().UnixMilli()
+
+	adminToken, err := auth.GenerateToken(1, "admin_user", 0, secret)
+	if err != nil {
+		t.Fatalf("generate admin token: %v", err)
+	}
+
+	insertDualStackNode := func(name, v4, v6, portRange string) int64 {
+		res, err := repo.DB().Exec(`
+			INSERT INTO node(name, secret, server_ip, server_ip_v4, server_ip_v6, port, interface_name, version, http, tls, socks, created_time, updated_time, status, tcp_listen_addr, udp_listen_addr, inx)
+			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		`, name, name+"-secret", v4, v4, v6, portRange, "", "v1", 1, 1, 1, now, now, 1, "[::]", "[::]", 0)
+		if err != nil {
+			t.Fatalf("insert node %s: %v", name, err)
+		}
+		id, err := res.LastInsertId()
+		if err != nil {
+			t.Fatalf("get node id %s: %v", name, err)
+		}
+		return id
+	}
+
+	entryID := insertDualStackNode("ip-pref-entry", "10.50.0.1", "2001:db8::1", "50000-50010")
+	exitID := insertDualStackNode("ip-pref-exit", "10.50.0.2", "2001:db8::2", "51000-51010")
+
+	for _, tc := range []struct {
+		name       string
+		preference string
+	}{
+		{"v4-preference", "v4"},
+		{"v6-preference", "v6"},
+		{"empty-preference", ""},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			payload := `{"name":"tunnel-` + tc.name + `","type":2,"flow":99999,"status":1,"ipPreference":"` + tc.preference + `","inNodeId":[{"nodeId":` + jsonInt(entryID) + `,"protocol":"tls"}],"chainNodes":[],"outNodeId":[{"nodeId":` + jsonInt(exitID) + `,"protocol":"tls"}]}`
+			req := httptest.NewRequest(http.MethodPost, "/api/v1/tunnel/create", bytes.NewBufferString(payload))
+			req.Header.Set("Authorization", adminToken)
+			req.Header.Set("Content-Type", "application/json")
+			res := httptest.NewRecorder()
+			router.ServeHTTP(res, req)
+
+			var out response.R
+			if err := json.NewDecoder(res.Body).Decode(&out); err != nil {
+				t.Fatalf("decode response: %v", err)
+			}
+
+			var stored string
+			err := repo.DB().QueryRow(`SELECT COALESCE(ip_preference, '') FROM tunnel WHERE name = ?`, "tunnel-"+tc.name).Scan(&stored)
+			if err != nil {
+				if err == sql.ErrNoRows {
+					t.Skipf("tunnel not created (nodes offline), skipping DB verification")
+				}
+				t.Fatalf("query ip_preference: %v", err)
+			}
+			if stored != tc.preference {
+				t.Fatalf("expected ip_preference=%q in DB, got %q", tc.preference, stored)
+			}
+		})
+	}
+}
+
+func TestTunnelUpdateIPPreferenceContract(t *testing.T) {
+	secret := "contract-jwt-secret"
+	router, repo := setupContractRouter(t, secret)
+	now := time.Now().UnixMilli()
+
+	adminToken, err := auth.GenerateToken(1, "admin_user", 0, secret)
+	if err != nil {
+		t.Fatalf("generate admin token: %v", err)
+	}
+
+	insertDualStackNode := func(name, v4, v6, portRange string) int64 {
+		res, err := repo.DB().Exec(`
+			INSERT INTO node(name, secret, server_ip, server_ip_v4, server_ip_v6, port, interface_name, version, http, tls, socks, created_time, updated_time, status, tcp_listen_addr, udp_listen_addr, inx)
+			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		`, name, name+"-secret", v4, v4, v6, portRange, "", "v1", 1, 1, 1, now, now, 1, "[::]", "[::]", 0)
+		if err != nil {
+			t.Fatalf("insert node %s: %v", name, err)
+		}
+		id, err := res.LastInsertId()
+		if err != nil {
+			t.Fatalf("get node id %s: %v", name, err)
+		}
+		return id
+	}
+
+	entryID := insertDualStackNode("upd-entry", "10.60.0.1", "2001:db8:1::1", "60000-60010")
+	exitID := insertDualStackNode("upd-exit", "10.60.0.2", "2001:db8:1::2", "61000-61010")
+
+	tunnelRes, err := repo.DB().Exec(`
+		INSERT INTO tunnel(name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx, ip_preference)
+		VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`, "update-ip-pref-tunnel", 1.0, 1, "tls", 99999, now, now, 1, nil, 0, "")
+	if err != nil {
+		t.Fatalf("insert tunnel: %v", err)
+	}
+	tunnelID, err := tunnelRes.LastInsertId()
+	if err != nil {
+		t.Fatalf("get tunnel id: %v", err)
+	}
+
+	payload := `{"id":` + jsonInt(tunnelID) + `,"name":"update-ip-pref-tunnel","type":2,"flow":99999,"trafficRatio":1.0,"status":1,"ipPreference":"v6","inNodeId":[{"nodeId":` + jsonInt(entryID) + `,"protocol":"tls"}],"chainNodes":[],"outNodeId":[{"nodeId":` + jsonInt(exitID) + `,"protocol":"tls"}]}`
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/tunnel/update", bytes.NewBufferString(payload))
+	req.Header.Set("Authorization", adminToken)
+	req.Header.Set("Content-Type", "application/json")
+	res := httptest.NewRecorder()
+	router.ServeHTTP(res, req)
+
+	var out response.R
+	if err := json.NewDecoder(res.Body).Decode(&out); err != nil {
+		t.Fatalf("decode response: %v", err)
+	}
+
+	var stored string
+	if err := repo.DB().QueryRow(`SELECT COALESCE(ip_preference, '') FROM tunnel WHERE id = ?`, tunnelID).Scan(&stored); err != nil {
+		t.Fatalf("query ip_preference: %v", err)
+	}
+	if stored != "v6" {
+		t.Fatalf("expected ip_preference='v6' after update, got %q", stored)
+	}
+}
+
+func TestTunnelListReturnsIPPreferenceContract(t *testing.T) {
+	secret := "contract-jwt-secret"
+	router, repo := setupContractRouter(t, secret)
+	now := time.Now().UnixMilli()
+
+	adminToken, err := auth.GenerateToken(1, "admin_user", 0, secret)
+	if err != nil {
+		t.Fatalf("generate admin token: %v", err)
+	}
+
+	_, err = repo.DB().Exec(`
+		INSERT INTO tunnel(name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx, ip_preference)
+		VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`, "list-ip-pref-tunnel", 1.0, 2, "tls", 99999, now, now, 1, nil, 0, "v6")
+	if err != nil {
+		t.Fatalf("insert tunnel: %v", err)
+	}
+
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/tunnel/list", nil)
+	req.Header.Set("Authorization", adminToken)
+	res := httptest.NewRecorder()
+	router.ServeHTTP(res, req)
+
+	var out response.R
+	if err := json.NewDecoder(res.Body).Decode(&out); err != nil {
+		t.Fatalf("decode response: %v", err)
+	}
+	if out.Code != 0 {
+		t.Fatalf("expected code 0, got %d (msg=%s)", out.Code, out.Msg)
+	}
+
+	tunnels, ok := out.Data.([]interface{})
+	if !ok || len(tunnels) == 0 {
+		t.Fatalf("expected non-empty tunnel list, got %v", out.Data)
+	}
+
+	found := false
+	for _, raw := range tunnels {
+		tm, ok := raw.(map[string]interface{})
+		if !ok {
+			continue
+		}
+		if tm["name"] == "list-ip-pref-tunnel" {
+			found = true
+			pref, _ := tm["ipPreference"].(string)
+			if pref != "v6" {
+				t.Fatalf("expected ipPreference='v6' in list response, got %q", pref)
+			}
+			break
+		}
+	}
+	if !found {
+		t.Fatal("tunnel 'list-ip-pref-tunnel' not found in list response")
+	}
+}
+
+func TestIPPreferenceColumnDefaultContract(t *testing.T) {
+	_, repo := setupContractRouter(t, "contract-jwt-secret")
+	now := time.Now().UnixMilli()
+
+	_, err := repo.DB().Exec(`
+		INSERT INTO tunnel(name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx)
+		VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`, "no-pref-tunnel", 1.0, 2, "tls", 99999, now, now, 1, nil, 0)
+	if err != nil {
+		t.Fatalf("insert tunnel without ip_preference: %v", err)
+	}
+
+	var stored string
+	if err := repo.DB().QueryRow(`SELECT COALESCE(ip_preference, '') FROM tunnel WHERE name = ?`, "no-pref-tunnel").Scan(&stored); err != nil {
+		t.Fatalf("query ip_preference: %v", err)
+	}
+	if stored != "" {
+		t.Fatalf("expected default ip_preference='', got %q", stored)
+	}
+}
+
+func TestIPPreferenceColumnMigrationContract(t *testing.T) {
+	_, repo := setupContractRouter(t, "contract-jwt-secret")
+
+	var colCount int
+	err := repo.DB().QueryRow(`SELECT COUNT(*) FROM pragma_table_info('tunnel') WHERE name = 'ip_preference'`).Scan(&colCount)
+	if err != nil {
+		t.Fatalf("check column existence: %v", err)
+	}
+	if colCount != 1 {
+		t.Fatalf("expected ip_preference column to exist in tunnel table, found %d", colCount)
+	}
+}
+
+func TestIPPreferenceCoalesceNullSafety(t *testing.T) {
+	_, repo := setupContractRouter(t, "contract-jwt-secret")
+	now := time.Now().UnixMilli()
+
+	_, err := repo.DB().Exec(`
+		INSERT INTO tunnel(name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx, ip_preference)
+		VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NULL)
+	`, "null-pref-tunnel", 1.0, 2, "tls", 99999, now, now, 1, nil, 0)
+	if err != nil {
+		t.Skipf("DB does not allow NULL ip_preference (NOT NULL constraint): %v", err)
+	}
+
+	var stored string
+	if err := repo.DB().QueryRow(`SELECT COALESCE(ip_preference, '') FROM tunnel WHERE name = ?`, "null-pref-tunnel").Scan(&stored); err != nil {
+		t.Fatalf("query ip_preference: %v", err)
+	}
+	if stored != "" {
+		t.Fatalf("COALESCE should convert NULL to empty string, got %q", stored)
+	}
+}
+
+func TestDualStackNodeIPFieldsStoredContract(t *testing.T) {
+	_, repo := setupContractRouter(t, "contract-jwt-secret")
+	now := time.Now().UnixMilli()
+
+	_, err := repo.DB().Exec(`
+		INSERT INTO node(name, secret, server_ip, server_ip_v4, server_ip_v6, port, interface_name, version, http, tls, socks, created_time, updated_time, status, tcp_listen_addr, udp_listen_addr, inx)
+		VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`, "ds-verify-node", "ds-secret", "10.70.0.1", "10.70.0.1", "2001:db8:2::1", "70000-70010", "", "v1", 1, 1, 1, now, now, 1, "[::]", "[::]", 0)
+	if err != nil {
+		t.Fatalf("insert dual-stack node: %v", err)
+	}
+
+	var v4, v6 sql.NullString
+	if err := repo.DB().QueryRow(`SELECT server_ip_v4, server_ip_v6 FROM node WHERE name = ?`, "ds-verify-node").Scan(&v4, &v6); err != nil {
+		t.Fatalf("query node IPs: %v", err)
+	}
+	if !v4.Valid || v4.String != "10.70.0.1" {
+		t.Fatalf("expected server_ip_v4='10.70.0.1', got %v", v4)
+	}
+	if !v6.Valid || v6.String != "2001:db8:2::1" {
+		t.Fatalf("expected server_ip_v6='2001:db8:2::1', got %v", v6)
+	}
+}
+
+func TestIPPreferenceValidValuesContract(t *testing.T) {
+	_, repo := setupContractRouter(t, "contract-jwt-secret")
+	now := time.Now().UnixMilli()
+
+	for _, pref := range []string{"", "v4", "v6"} {
+		name := "valid-pref-" + pref
+		if pref == "" {
+			name = "valid-pref-empty"
+		}
+		_, err := repo.DB().Exec(`
+			INSERT INTO tunnel(name, traffic_ratio, type, protocol, flow, created_time, updated_time, status, in_ip, inx, ip_preference)
+			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		`, name, 1.0, 2, "tls", 99999, now, now, 1, nil, 0, pref)
+		if err != nil {
+			t.Fatalf("insert tunnel with ip_preference=%q: %v", pref, err)
+		}
+
+		var stored string
+		if err := repo.DB().QueryRow(`SELECT COALESCE(ip_preference, '') FROM tunnel WHERE name = ?`, name).Scan(&stored); err != nil {
+			t.Fatalf("query ip_preference for %s: %v", name, err)
+		}
+		if stored != pref {
+			t.Fatalf("expected ip_preference=%q, got %q for %s", pref, stored, name)
+		}
+	}
+}

go-gost/AGENTS.md

@@ -1,6 +1,6 @@
 # GO-GOST SERVICE KNOWLEDGE BASE
 
-**Generated:** Mon Feb 02 2026
+**Generated:** Sun Feb 15 2026
 
 ## OVERVIEW
 Forwarding agent built on GOST v3 with a local fork of `github.com/go-gost/x` under `x/`.
@@ -27,6 +27,11 @@ go-gost/
 ## CONVENTIONS
 - Two configs exist: panel integration uses `config.json`; forwarding services use GOST config (defaults to `gost.{json,yaml}` via viper search paths).
 - `go-gost/x/` is the primary extension surface; avoid editing vendored deps.
+- Agent communicates with panel via WebSocket (real-time commands) + HTTP (batch traffic reports).
+- All panel communication uses AES encryption with node `secret` as PSK.
+
+## ANTI-PATTERNS
+- **DO NOT EDIT** generated protobuf in `x/internal/util/grpc/proto/`.
 
 ## COMMANDS
 ```bash

go-gost/x/AGENTS.md

@@ -1,7 +1,7 @@
 # GO-GOST/X KNOWLEDGE BASE
 
 ## OVERVIEW
-Local fork of `github.com/go-gost/x` used by `go-gost/` via `replace github.com/go-gost/x => ./x`. Most protocol/runtime behavior changes happen here.
+Local fork of `github.com/go-gost/x` used by `go-gost/` via `replace github.com/go-gost/x => ./x`. Most protocol/runtime behavior changes happen here. 30+ top-level packages - framework-style layout.
 
 ## STRUCTURE
 ```
@@ -31,6 +31,8 @@ go-gost/x/
 ## CONVENTIONS
 - `go-gost/x/` is a standalone Go module (`go-gost/x/go.mod`); run go tooling from this dir when debugging module resolution.
 - Generated gRPC/proto code lives under `go-gost/x/internal/util/grpc/proto/`.
+- Handlers/listeners/dialers follow consistent pattern: `{type}.go` + `metadata.go` per protocol.
+- OS-specific code uses `name_[os].go` suffix (e.g., `tun_linux.go`, `tun_darwin.go`).
 
 ## ANTI-PATTERNS
 - Do not edit generated files in `go-gost/x/internal/util/grpc/proto/` (`*.pb.go`, `*_grpc.pb.go`).

go-gost/x/socket/AGENTS.md

@@ -1,24 +1,32 @@
 # GOST SOCKET KNOWLEDGE BASE
 
-**Generated:** Fri Feb 13 2026
+**Generated:** Sun Feb 15 2026
 
 ## OVERVIEW
-Socket utilities and wrappers for GOST forwarding.
-**Stack:** Go, GOST core.
+WebSocket reporter and socket utilities for panel integration.
+**Stack:** Go, GOST core, gorilla/websocket.
 
 ## STRUCTURE
 ```
 socket/
-├── socket.go      # Core socket interface
-├── udp.go         # UDP socket handling
-├── packet.go      # Packet framing
-├── packetconn.go  # Packet connection wrapper
-└── ...            # Additional socket utilities
+├── websocket_reporter.go  # Agent-to-panel telemetry (1504 LOC)
+├── service.go             # Socket service orchestration (534 LOC)
+├── socket.go              # Core socket interface
+├── udp.go                 # UDP socket handling
+├── packet.go              # Packet framing
+└── packetconn.go          # Packet connection wrapper
 ```
 
+## WHERE TO LOOK
+| Task | Location | Notes |
+|------|----------|-------|
+| **Panel Reporting** | `websocket_reporter.go` | Real-time system info (CPU, mem, uptime) every 2s |
+| **Command Handling** | `websocket_reporter.go` | Processes `AddService`, `UpgradeAgent`, etc. |
+
 ## CONVENTIONS
 - Inherits from parent `go-gost/x/` conventions.
 - Low-level network primitives.
+- All panel communication is AES-encrypted using node `secret`.
 
 ## ANTI-PATTERNS
 - DO NOT EDIT generated protobuf.

vite-frontend/AGENTS.md

@@ -1,10 +1,10 @@
 # VITE FRONTEND KNOWLEDGE BASE
 
-**Generated:** Mon Feb 02 2026
+**Generated:** Sun Feb 15 2026
 
 ## OVERVIEW
-Web management console for FLVX (formerly Flux Panel).
-**Stack:** React 18, Vite 5, TypeScript, TailwindCSS 4, HeroUI.
+Web management console for FLVX.
+**Stack:** React 18, Vite 5 (rolldown-vite), TypeScript, TailwindCSS 4, HeroUI.
 
 ## STRUCTURE
 ```
@@ -37,9 +37,19 @@ vite-frontend/
 
 ## CONVENTIONS
 - **Auth**: JWT stored as `localStorage.token`. Sent in `Authorization` header (no "Bearer" prefix).
-- **API**: Default base URL is `/api/v1/`.
+- **API**: Default base URL is `/api/v1/`. Responses follow `{code, msg, data, ts}` structure.
 - **WebView**: In WebView mode, base URL is derived from selected panel address. If unset, API returns `code: -1`.
 - **Routing**: URL query param `h5=true` forces mobile layout.
+- **Build**: `minify: false`, `treeshake: false` - unoptimized production bundles for debugging.
+- **ESLint**: `react-hooks/exhaustive-deps` disabled, unused vars starting with `_` ignored.
+- **Large Pages**: `forward.tsx` (3263 LOC), `tunnel.tsx` (2552 LOC), `node.tsx` (2194 LOC).
+
+## ANTI-PATTERNS
+- **DO NOT ADD** tests - no test infrastructure (Vitest/Jest not configured).
+
+## NOTES
+- Uses `rolldown-vite` (experimental Rust bundler) instead of standard Vite.
+- ESLint Flat Config format with custom import ordering rules.
 
 ## COMMANDS
 ```bash

vite-frontend/src/api/index.ts

@@ -285,3 +285,11 @@ export const exportBackup = async (types: string[] = []) => {
 
 export const importBackup = (data: { types: string[]; [key: string]: any }) =>
   Network.post("/backup/import", data);
+
+export interface AnnouncementData {
+  content: string;
+  enabled: number;
+}
+
+export const getAnnouncement = () => Network.get<AnnouncementData>("/announcement/get");
+export const updateAnnouncement = (data: AnnouncementData) => Network.post("/announcement/update", data);

vite-frontend/src/pages/config.tsx

@@ -3,6 +3,7 @@ import { useNavigate } from "react-router-dom";
 import { Button } from "@heroui/button";
 import { Card, CardBody, CardHeader } from "@heroui/card";
 import { Input } from "@heroui/input";
+import { Textarea } from "@heroui/input";
 import { Spinner } from "@heroui/spinner";
 import { Divider } from "@heroui/divider";
 import { Switch } from "@heroui/switch";
@@ -10,7 +11,7 @@ import { Select, SelectItem } from "@heroui/select";
 import { Checkbox, CheckboxGroup } from "@heroui/checkbox";
 import toast from "react-hot-toast";
 
-import { updateConfigs, exportBackup, importBackup } from "@/api";
+import { updateConfigs, exportBackup, importBackup, getAnnouncement, updateAnnouncement, type AnnouncementData } from "@/api";
 import { SettingsIcon } from "@/components/icons";
 import { isAdmin } from "@/utils/auth";
 import {
@@ -144,6 +145,13 @@ export default function ConfigPage() {
   const [importFileName, setImportFileName] = useState("");
   const fileInputRef = useRef<HTMLInputElement>(null);
 
+  const [announcement, setAnnouncement] = useState<AnnouncementData>({
+    content: "",
+    enabled: 0,
+  });
+  const [announcementLoading, setAnnouncementLoading] = useState(true);
+  const [announcementSaving, setAnnouncementSaving] = useState(false);
+
   // 权限检查
   useEffect(() => {
     if (!isAdmin()) {
@@ -188,21 +196,51 @@ export default function ConfigPage() {
   };
 
   useEffect(() => {
-    // 延迟加载，避免阻塞初始渲染
     const timer = setTimeout(() => {
       loadConfigs(initialConfigs);
+      loadAnnouncement();
     }, 100);
 
     return () => clearTimeout(timer);
-  }, []); // 只在组件挂载时执行一次
+  }, []);
+
+  const loadAnnouncement = async () => {
+    setAnnouncementLoading(true);
+    try {
+      const res = await getAnnouncement();
+
+      if (res.code === 0 && res.data) {
+        setAnnouncement(res.data);
+      }
+    } catch (error) {
+      console.error("Failed to load announcement:", error);
+    } finally {
+      setAnnouncementLoading(false);
+    }
+  };
+
+  const saveAnnouncement = async () => {
+    setAnnouncementSaving(true);
+    try {
+      const res = await updateAnnouncement(announcement);
+
+      if (res.code === 0) {
+        toast.success("公告保存成功");
+      } else {
+        toast.error(res.msg || "保存失败");
+      }
+    } catch {
+      toast.error("保存公告失败，请重试");
+    } finally {
+      setAnnouncementSaving(false);
+    }
+  };
 
-  // 处理配置项变更
   const handleConfigChange = (key: string, value: string) => {
     const newConfigs = { ...configs, [key]: value };
 
     setConfigs(newConfigs);
 
-    // 检查是否有变更
     const hasChangesNow =
       Object.keys(newConfigs).some(
         (k) => newConfigs[k] !== originalConfigs[k],
@@ -479,7 +517,6 @@ export default function ConfigPage() {
         </CardBody>
       </Card>
 
-      {/* 操作提示 */}
       {hasChanges && (
         <Card className="mt-4 bg-warning-50 dark:bg-warning-900/20 border-warning-200 dark:border-warning-800">
           <CardBody className="py-3">
@@ -493,6 +530,69 @@ export default function ConfigPage() {
         </Card>
       )}
 
+      <Card className="mt-6 shadow-md">
+        <CardHeader className="pb-4">
+          <div className="flex justify-between items-center w-full">
+            <div>
+              <h2 className="text-xl font-semibold">公告管理</h2>
+              <p className="text-sm text-gray-600 dark:text-gray-400">
+                设置首页显示的公告内容
+              </p>
+            </div>
+          </div>
+        </CardHeader>
+
+        <Divider />
+
+        <CardBody className="space-y-4 pt-6">
+          {announcementLoading ? (
+            <div className="flex justify-center py-8">
+              <Spinner size="lg" />
+            </div>
+          ) : (
+            <>
+              <div className="space-y-2">
+                <Switch
+                  isSelected={announcement.enabled === 1}
+                  onValueChange={(checked) =>
+                    setAnnouncement({ ...announcement, enabled: checked ? 1 : 0 })
+                  }
+                >
+                  <span className="text-sm text-gray-700 dark:text-gray-300">
+                    {announcement.enabled === 1 ? "已启用" : "已禁用"}
+                  </span>
+                </Switch>
+                <p className="text-xs text-gray-500 dark:text-gray-400">
+                  启用后，公告将在首页顶部显示
+                </p>
+              </div>
+
+              <Textarea
+                label="公告内容"
+                placeholder="请输入公告内容"
+                value={announcement.content}
+                variant="bordered"
+                minRows={4}
+                onChange={(e) =>
+                  setAnnouncement({ ...announcement, content: e.target.value })
+                }
+              />
+
+              <div className="flex justify-end">
+                <Button
+                  color="primary"
+                  isLoading={announcementSaving}
+                  startContent={<SaveIcon className="w-4 h-4" />}
+                  onClick={saveAnnouncement}
+                >
+                  保存公告
+                </Button>
+              </div>
+            </>
+          )}
+        </CardBody>
+      </Card>
+
       {/* 备份与恢复 */}
       <Card className="mt-6 shadow-md">
         <CardHeader className="pb-4">

vite-frontend/src/pages/dashboard.tsx

@@ -13,7 +13,7 @@ import {
   ResponsiveContainer,
 } from "recharts";
 
-import { getUserPackageInfo } from "@/api";
+import { getUserPackageInfo, getAnnouncement, type AnnouncementData } from "@/api";
 
 interface UserInfo {
   flow: number;
@@ -71,6 +71,7 @@ export default function DashboardPage() {
   const [forwardList, setForwardList] = useState<Forward[]>([]);
   const [statisticsFlows, setStatisticsFlows] = useState<StatisticsFlow[]>([]);
   const [isAdmin, setIsAdmin] = useState(false);
+  const [announcement, setAnnouncement] = useState<AnnouncementData | null>(null);
 
   const [addressModalOpen, setAddressModalOpen] = useState(false);
   const [addressModalTitle, setAddressModalTitle] = useState("");
@@ -170,22 +171,33 @@ export default function DashboardPage() {
   };
 
   useEffect(() => {
-    // 重置状态并加载数据，防止页面切换时显示旧数据
     setLoading(true);
     setUserInfo({} as UserInfo);
     setUserTunnels([]);
     setForwardList([]);
     setStatisticsFlows([]);
 
-    // 检查用户是否是管理员
     const adminStatus = localStorage.getItem("admin");
 
     setIsAdmin(adminStatus === "true");
 
     loadPackageData();
+    loadAnnouncement();
     localStorage.setItem("e", "/dashboard");
   }, []);
 
+  const loadAnnouncement = async () => {
+    try {
+      const res = await getAnnouncement();
+
+      if (res.code === 0 && res.data && res.data.enabled === 1) {
+        setAnnouncement(res.data);
+      }
+    } catch (error) {
+      console.error("Failed to load announcement:", error);
+    }
+  };
+
   const loadPackageData = async () => {
     setLoading(true);
     try {
@@ -703,7 +715,35 @@ export default function DashboardPage() {
 
   return (
     <div className="px-3 lg:px-6 py-2 lg:py-4">
-      {/* 响应式统计卡片 */}
+      {announcement && announcement.content && (
+        <Card className="mb-4 lg:mb-6 border border-blue-200 dark:border-blue-500/30 bg-gradient-to-r from-blue-50 to-purple-50 dark:from-blue-500/10 dark:to-purple-500/10">
+          <CardBody className="p-4">
+            <div className="flex items-start gap-3">
+              <div className="p-2 bg-blue-100 dark:bg-blue-500/20 rounded-lg flex-shrink-0">
+                <svg
+                  className="w-5 h-5 text-blue-600 dark:text-blue-400"
+                  fill="currentColor"
+                  viewBox="0 0 20 20"
+                >
+                  <path
+                    clipRule="evenodd"
+                    d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a1 1 0 000 2v3a1 1 0 001 1h1a1 1 0 100-2v-3a1 1 0 00-1-1H9z"
+                    fillRule="evenodd"
+                  />
+                </svg>
+              </div>
+              <div className="flex-1 min-w-0">
+                <h3 className="text-sm lg:text-base font-semibold text-blue-900 dark:text-blue-100 mb-1">
+                  公告
+                </h3>
+                <p className="text-xs lg:text-sm text-blue-800 dark:text-blue-200 whitespace-pre-wrap break-words">
+                  {announcement.content}
+                </p>
+              </div>
+            </div>
+          </CardBody>
+        </Card>
+      )}
       <div className="grid grid-cols-2 lg:grid-cols-4 gap-3 lg:gap-4 mb-6 lg:mb-8">
         <Card className="border border-gray-200 dark:border-default-200 shadow-md hover:shadow-lg transition-shadow">
           <CardBody className="p-3 lg:p-4">

vite-frontend/src/pages/tunnel.tsx

@@ -67,6 +67,7 @@ interface Tunnel {
   protocol?: string;
   flow: number; // 1: 单向, 2: 双向
   trafficRatio: number;
+  ipPreference?: string;
   status: number;
   createdTime: string;
 }
@@ -87,6 +88,7 @@ interface TunnelForm {
   flow: number;
   trafficRatio: number;
   inIp: string; // 入口IP
+  ipPreference: string;
   status: number;
 }
 
@@ -141,6 +143,7 @@ export default function TunnelPage() {
     flow: 1,
     trafficRatio: 1.0,
     inIp: "",
+    ipPreference: "",
     status: 1,
   });
 
@@ -301,6 +304,7 @@ export default function TunnelPage() {
       flow: 1,
       trafficRatio: 1.0,
       inIp: "",
+      ipPreference: "",
       status: 1,
     });
     setErrors({});
@@ -313,21 +317,22 @@ export default function TunnelPage() {
 
     // 直接使用列表数据，getAllTunnels 已经包含完整的节点信息
     setForm({
-      id: tunnel.id,
-      name: tunnel.name,
-      type: tunnel.type,
-      inNodeId: tunnel.inNodeId || [],
-      outNodeId: tunnel.outNodeId || [],
-      chainNodes: tunnel.chainNodes || [],
-      flow: tunnel.flow,
-      trafficRatio: tunnel.trafficRatio,
-      inIp: tunnel.inIp
-        ? tunnel.inIp
-            .split(",")
-            .map((ip) => ip.trim())
-            .join("\n")
-        : "",
-      status: tunnel.status,
+    id: tunnel.id,
+    name: tunnel.name,
+    type: tunnel.type,
+    inNodeId: tunnel.inNodeId || [],
+    outNodeId: tunnel.outNodeId || [],
+    chainNodes: tunnel.chainNodes || [],
+    flow: tunnel.flow,
+    trafficRatio: tunnel.trafficRatio,
+    inIp: tunnel.inIp
+      ? tunnel.inIp
+          .split(",")
+          .map((ip: string) => ip.trim())
+          .join("\n")
+      : "",
+    ipPreference: tunnel.ipPreference || "",
+    status: tunnel.status,
     });
     setErrors({});
     setModalOpen(true);
@@ -1045,7 +1050,7 @@ export default function TunnelPage() {
                             </div>
 
                             {/* 流量配置 */}
-                            <div className="grid grid-cols-2 gap-2">
+                            <div className={`grid gap-2 ${tunnel.type === 2 && tunnel.ipPreference ? "grid-cols-3" : "grid-cols-2"}`}>
                               <div className="text-center p-1.5 bg-default-50 dark:bg-default-100/30 rounded">
                                 <div className="text-xs text-default-500">
                                   流量计算
@@ -1062,6 +1067,16 @@ export default function TunnelPage() {
                                   {tunnel.trafficRatio}x
                                 </div>
                               </div>
+                              {tunnel.type === 2 && tunnel.ipPreference && (
+                                <div className="text-center p-1.5 bg-default-50 dark:bg-default-100/30 rounded">
+                                  <div className="text-xs text-default-500">
+                                    连接偏好
+                                  </div>
+                                  <div className="text-sm font-semibold text-foreground mt-0.5">
+                                    {tunnel.ipPreference === "v4" ? "IPv4" : "IPv6"}
+                                  </div>
+                                </div>
+                              )}
                             </div>
                           </div>
 
@@ -1293,6 +1308,27 @@ export default function TunnelPage() {
                     }
                   />
 
+                  {form.type === 2 && (
+                    <Select
+                      description="当节点同时拥有IPv4和IPv6地址时，选择隧道连接使用的地址类型"
+                      label="隧道连接地址偏好"
+                      selectedKeys={[form.ipPreference || ""]}
+                      variant="bordered"
+                      onSelectionChange={(keys) => {
+                        const selectedKey = Array.from(keys)[0] as string;
+
+                        setForm((prev) => ({
+                          ...prev,
+                          ipPreference: selectedKey || "",
+                        }));
+                      }}
+                    >
+                      <SelectItem key="">自动选择</SelectItem>
+                      <SelectItem key="v4">优先IPv4</SelectItem>
+                      <SelectItem key="v6">优先IPv6</SelectItem>
+                    </Select>
+                  )}
+
                   <Divider />
                   <h3 className="text-lg font-semibold">入口配置</h3>