Merge pull request #6986 from feeeei/feat/site-billing-mode

feat(settings): 新增「站点类型」开关（充值 & 订阅 / 仅充值 / 仅订阅）

backend/internal/handler/admin/setting_handler.go

@@ -383,6 +383,7 @@ func (h *SettingHandler) GetSettings(c *gin.Context) {
 		GrokDefaultBaseURLMode:         settings.GrokDefaultBaseURLMode,
 
 		AvailableChannelsEnabled: settings.AvailableChannelsEnabled,
+		SubscriptionEnabled:      settings.SubscriptionEnabled,
 
 		ModelPlazaEnabled:       settings.ModelPlazaEnabled,
 		ModelPlazaRequireAuth:   settings.ModelPlazaRequireAuth,

backend/internal/handler/admin/setting_handler_audit.go

@@ -579,6 +579,9 @@ func diffSettings(before *service.SystemSettings, after *service.SystemSettings,
 	if before.AvailableChannelsEnabled != after.AvailableChannelsEnabled {
 		changed = append(changed, "available_channels_enabled")
 	}
+	if before.SubscriptionEnabled != after.SubscriptionEnabled {
+		changed = append(changed, "subscription_enabled")
+	}
 	if before.ModelPlazaEnabled != after.ModelPlazaEnabled {
 		changed = append(changed, "model_plaza_enabled")
 	}

backend/internal/handler/admin/setting_handler_partial_payload_test.go

@@ -186,3 +186,20 @@ func TestUpdateSettingsValidatesTencentCaptchaAppIDWhenEnabledFlagIsOmitted(t *t
 	require.Equal(t, http.StatusBadRequest, rec.Code)
 	require.Contains(t, rec.Body.String(), "positive integer")
 }
+
+// subscription_enabled is an opt-out switch: an explicit false is written as-is,
+// and a later payload that omits the field keeps the stored value.
+func TestUpdateSettingsSubscriptionEnabledIsWritableAndKeptWhenOmitted(t *testing.T) {
+	h, repo := newStepUpSwitchTestHandler(t, map[string]string{
+		service.SettingKeySubscriptionEnabled: "true",
+	})
+
+	rec := doUpdateSettings(t, h, map[string]any{"subscription_enabled": false}, nil)
+	require.Equal(t, http.StatusOK, rec.Code)
+	require.Equal(t, "false", repo.values[service.SettingKeySubscriptionEnabled])
+
+	rec = doUpdateSettings(t, h, map[string]any{"site_name": "Example Gateway"}, nil)
+	require.Equal(t, http.StatusOK, rec.Code)
+	require.Equal(t, "false", repo.values[service.SettingKeySubscriptionEnabled],
+		"a payload without subscription_enabled must not flip the stored value back to true")
+}

backend/internal/handler/admin/setting_handler_update.go

@@ -344,6 +344,9 @@ type UpdateSettingsRequest struct {
 	// Available Channels feature switch (user-facing)
 	AvailableChannelsEnabled *bool `json:"available_channels_enabled"`
 
+	// Subscription feature switch (user-facing subscription surface; see SettingKeySubscriptionEnabled)
+	SubscriptionEnabled *bool `json:"subscription_enabled"`
+
 	// Model Plaza feature switches + description
 	ModelPlazaEnabled     *bool   `json:"model_plaza_enabled"`
 	ModelPlazaRequireAuth *bool   `json:"model_plaza_require_auth"`
@@ -1937,6 +1940,12 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 			}
 			return previousSettings.AvailableChannelsEnabled
 		}(),
+		SubscriptionEnabled: func() bool {
+			if req.SubscriptionEnabled != nil {
+				return *req.SubscriptionEnabled
+			}
+			return previousSettings.SubscriptionEnabled
+		}(),
 		ModelPlazaEnabled: func() bool {
 			if req.ModelPlazaEnabled != nil {
 				return *req.ModelPlazaEnabled
@@ -2380,6 +2389,7 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		GrokDefaultBaseURLMode:         updatedSettings.GrokDefaultBaseURLMode,
 
 		AvailableChannelsEnabled: updatedSettings.AvailableChannelsEnabled,
+		SubscriptionEnabled:      updatedSettings.SubscriptionEnabled,
 
 		ModelPlazaEnabled:       updatedSettings.ModelPlazaEnabled,
 		ModelPlazaRequireAuth:   updatedSettings.ModelPlazaRequireAuth,