diff --git a/devserver/server.go b/devserver/server.go
index 1ca73c6..705cbce 100644
--- a/devserver/server.go
+++ b/devserver/server.go
@@ -188,7 +188,7 @@ func Run(cfg Config) error {
 // routePrefixes 从路由声明中提取不重复的路径前缀（如 /v1/）
 func routePrefixes(routes []sdk.RouteDefinition) []string {
 	seen := make(map[string]bool)
-	var prefixes []string
+	prefixes := make([]string, 0, len(routes))
 	for _, r := range routes {
 		// 取第二个 / 之前的部分作为前缀
 		parts := strings.SplitN(strings.TrimPrefix(r.Path, "/"), "/", 2)
diff --git a/devserver/server_test.go b/devserver/server_test.go
new file mode 100644
index 0000000..aea71c4
--- /dev/null
+++ b/devserver/server_test.go
@@ -0,0 +1,27 @@
+package devserver
+
+import (
+	"testing"
+
+	sdk "github.com/DouDOU-start/airgate-sdk"
+)
+
+func TestRoutePrefixesDeduplicates(t *testing.T) {
+	t.Parallel()
+
+	got := routePrefixes([]sdk.RouteDefinition{
+		{Path: "/v1/chat/completions"},
+		{Path: "/v1/models"},
+		{Path: "/oauth/callback"},
+		{Path: "/"},
+	})
+	want := []string{"/v1/", "/oauth/", "//"}
+	if len(got) != len(want) {
+		t.Fatalf("routePrefixes length = %d, want %d (%v)", len(got), len(want), got)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("routePrefixes[%d] = %q, want %q", i, got[i], want[i])
+		}
+	}
+}
diff --git a/frontend/src/css.ts b/frontend/src/css.ts
index e3150d8..93d0f1e 100644
--- a/frontend/src/css.ts
+++ b/frontend/src/css.ts
@@ -160,13 +160,23 @@ export function setTheme(theme: ThemeName, options: ThemeSetOptions = {}): void
   const themeAttribute = options.themeAttribute || 'data-theme';
   const target = options.target || document.documentElement;
   target.setAttribute(themeAttribute, theme);
-  localStorage.setItem(options.storageKey || 'ag-theme', theme);
+  try {
+    if (typeof localStorage !== 'undefined') {
+      localStorage.setItem(options.storageKey || 'ag-theme', theme);
+    }
+  } catch {
+    // Theme switching should keep working when storage is unavailable.
+  }
 }
 
 /** 读取已保存的主题偏好，默认 dark */
 export function getStoredTheme(options: ThemeStorageOptions = {}): ThemeName {
   if (typeof localStorage === 'undefined') return 'dark';
-  return (localStorage.getItem(options.storageKey || 'ag-theme') as ThemeName) || 'dark';
+  try {
+    return (localStorage.getItem(options.storageKey || 'ag-theme') as ThemeName) || 'dark';
+  } catch {
+    return 'dark';
+  }
 }
 
 /** 生成 Tailwind 可消费的 theme bridge */
diff --git a/grpc/common.go b/grpc/common.go
index 1af92eb..c800740 100644
--- a/grpc/common.go
+++ b/grpc/common.go
@@ -84,6 +84,9 @@ func (b *pluginBase) Info() sdk.PluginInfo {
 		Dependencies: resp.Dependencies,
 	}
 
+	if len(resp.ConfigSchema) > 0 {
+		info.ConfigSchema = make([]sdk.ConfigField, 0, len(resp.ConfigSchema))
+	}
 	for _, cf := range resp.ConfigSchema {
 		info.ConfigSchema = append(info.ConfigSchema, sdk.ConfigField{
 			Key:         cf.Key,
@@ -96,12 +99,18 @@ func (b *pluginBase) Info() sdk.PluginInfo {
 		})
 	}
 
+	if len(resp.AccountTypes) > 0 {
+		info.AccountTypes = make([]sdk.AccountType, 0, len(resp.AccountTypes))
+	}
 	for _, at := range resp.AccountTypes {
 		accountType := sdk.AccountType{
 			Key:         at.Key,
 			Label:       at.Label,
 			Description: at.Description,
 		}
+		if len(at.Fields) > 0 {
+			accountType.Fields = make([]sdk.CredentialField, 0, len(at.Fields))
+		}
 		for _, f := range at.Fields {
 			accountType.Fields = append(accountType.Fields, sdk.CredentialField{
 				Key:          f.Key,
@@ -114,6 +123,9 @@ func (b *pluginBase) Info() sdk.PluginInfo {
 		}
 		info.AccountTypes = append(info.AccountTypes, accountType)
 	}
+	if len(resp.FrontendPages) > 0 {
+		info.FrontendPages = make([]sdk.FrontendPage, 0, len(resp.FrontendPages))
+	}
 	for _, p := range resp.FrontendPages {
 		info.FrontendPages = append(info.FrontendPages, sdk.FrontendPage{
 			Path:        p.Path,
@@ -123,6 +135,9 @@ func (b *pluginBase) Info() sdk.PluginInfo {
 			Audience:    p.Audience,
 		})
 	}
+	if len(resp.FrontendWidgets) > 0 {
+		info.FrontendWidgets = make([]sdk.FrontendWidget, 0, len(resp.FrontendWidgets))
+	}
 	for _, w := range resp.FrontendWidgets {
 		info.FrontendWidgets = append(info.FrontendWidgets, sdk.FrontendWidget{
 			Slot:      w.Slot,
diff --git a/grpc/extension_server.go b/grpc/extension_server.go
index c301ccc..20be0b2 100644
--- a/grpc/extension_server.go
+++ b/grpc/extension_server.go
@@ -86,6 +86,9 @@ func (s *ExtensionGRPCServer) Migrate(_ context.Context, _ *pb.Empty) (*pb.Empty
 func (s *ExtensionGRPCServer) GetBackgroundTasks(_ context.Context, _ *pb.Empty) (*pb.BackgroundTasksResponse, error) {
 	tasks := s.Impl.BackgroundTasks()
 	resp := &pb.BackgroundTasksResponse{}
+	if len(tasks) > 0 {
+		resp.Tasks = make([]*pb.BackgroundTaskProto, 0, len(tasks))
+	}
 	taskMap := make(map[string]func(context.Context) error, len(tasks))
 	for _, t := range tasks {
 		resp.Tasks = append(resp.Tasks, &pb.BackgroundTaskProto{
diff --git a/grpc/gateway_server.go b/grpc/gateway_server.go
index 4c4d0e7..7b1ba4a 100644
--- a/grpc/gateway_server.go
+++ b/grpc/gateway_server.go
@@ -23,6 +23,9 @@ func (s *GatewayGRPCServer) GetPlatform(_ context.Context, _ *pb.Empty) (*pb.Str
 func (s *GatewayGRPCServer) GetModels(_ context.Context, _ *pb.Empty) (*pb.ModelsResponse, error) {
 	models := s.Impl.Models()
 	resp := &pb.ModelsResponse{}
+	if len(models) > 0 {
+		resp.Models = make([]*pb.ModelInfoProto, 0, len(models))
+	}
 	for _, m := range models {
 		resp.Models = append(resp.Models, &pb.ModelInfoProto{
 			Id:                       m.ID,
@@ -45,6 +48,9 @@ func (s *GatewayGRPCServer) GetModels(_ context.Context, _ *pb.Empty) (*pb.Model
 func (s *GatewayGRPCServer) GetRoutes(_ context.Context, _ *pb.Empty) (*pb.RoutesResponse, error) {
 	routes := s.Impl.Routes()
 	resp := &pb.RoutesResponse{}
+	if len(routes) > 0 {
+		resp.Routes = make([]*pb.RouteDefinitionProto, 0, len(routes))
+	}
 	for _, r := range routes {
 		resp.Routes = append(resp.Routes, &pb.RouteDefinitionProto{
 			Method:      r.Method,
diff --git a/grpc/plugin_server.go b/grpc/plugin_server.go
index 94f23be..66b8dbb 100644
--- a/grpc/plugin_server.go
+++ b/grpc/plugin_server.go
@@ -35,6 +35,9 @@ func (s *PluginGRPCServer) GetInfo(_ context.Context, _ *pb.Empty) (*pb.PluginIn
 		Dependencies: info.Dependencies,
 	}
 
+	if len(info.ConfigSchema) > 0 {
+		resp.ConfigSchema = make([]*pb.ConfigFieldProto, 0, len(info.ConfigSchema))
+	}
 	for _, cf := range info.ConfigSchema {
 		resp.ConfigSchema = append(resp.ConfigSchema, &pb.ConfigFieldProto{
 			Key:          cf.Key,
@@ -47,12 +50,18 @@ func (s *PluginGRPCServer) GetInfo(_ context.Context, _ *pb.Empty) (*pb.PluginIn
 		})
 	}
 
+	if len(info.AccountTypes) > 0 {
+		resp.AccountTypes = make([]*pb.AccountTypeProto, 0, len(info.AccountTypes))
+	}
 	for _, at := range info.AccountTypes {
 		atProto := &pb.AccountTypeProto{
 			Key:         at.Key,
 			Label:       at.Label,
 			Description: at.Description,
 		}
+		if len(at.Fields) > 0 {
+			atProto.Fields = make([]*pb.CredentialFieldProto, 0, len(at.Fields))
+		}
 		for _, f := range at.Fields {
 			atProto.Fields = append(atProto.Fields, &pb.CredentialFieldProto{
 				Key:          f.Key,
@@ -65,6 +74,9 @@ func (s *PluginGRPCServer) GetInfo(_ context.Context, _ *pb.Empty) (*pb.PluginIn
 		}
 		resp.AccountTypes = append(resp.AccountTypes, atProto)
 	}
+	if len(info.FrontendPages) > 0 {
+		resp.FrontendPages = make([]*pb.FrontendPageProto, 0, len(info.FrontendPages))
+	}
 	for _, p := range info.FrontendPages {
 		resp.FrontendPages = append(resp.FrontendPages, &pb.FrontendPageProto{
 			Path:        p.Path,
@@ -74,6 +86,9 @@ func (s *PluginGRPCServer) GetInfo(_ context.Context, _ *pb.Empty) (*pb.PluginIn
 			Audience:    p.Audience,
 		})
 	}
+	if len(info.FrontendWidgets) > 0 {
+		resp.FrontendWidgets = make([]*pb.FrontendWidgetProto, 0, len(info.FrontendWidgets))
+	}
 	for _, w := range info.FrontendWidgets {
 		resp.FrontendWidgets = append(resp.FrontendWidgets, &pb.FrontendWidgetProto{
 			Slot:      w.Slot,
@@ -166,7 +181,7 @@ func (s *PluginGRPCServer) GetWebAssets(_ context.Context, _ *pb.Empty) (*pb.Web
 	if len(assets) == 0 {
 		return &pb.WebAssetsResponse{HasAssets: false}, nil
 	}
-	resp := &pb.WebAssetsResponse{HasAssets: true}
+	resp := &pb.WebAssetsResponse{HasAssets: true, Files: make([]*pb.WebAssetFile, 0, len(assets))}
 	for path, content := range assets {
 		resp.Files = append(resp.Files, &pb.WebAssetFile{
 			Path:    path,