merge fix/settings-trim: dead settings, upstream remnants, JSON/Clash subscriptions removed

# Conflicts:
#	frontend/src/models/setting.ts
#	frontend/src/pages/settings/GeneralTab.tsx
#	frontend/src/pages/settings/SettingsPage.tsx
#	frontend/src/pages/settings/SubscriptionBalancersTab.tsx
#	frontend/src/pages/xray/outbounds/OutboundsTab.css
#	frontend/src/schemas/setting.ts

internal/web/service/inbound.go

@@ -9,7 +9,6 @@ import (
 	"fmt"
 	"net"
 	"regexp"
-	"slices"
 	"sort"
 	"strings"
 	"time"
@@ -1371,22 +1370,6 @@ func (s *InboundService) DelInbound(id int) (bool, error) {
 		if err := tx.Where("inbound_id = ?", id).Delete(&model.Host{}).Error; err != nil {
 			return err
 		}
-		// Drop the deleted inbound from any sub-balancer that selects it; a
-		// dangling id would emit a member no subscriber can resolve (#5648).
-		var balancers []model.SubBalancer
-		if err := tx.Find(&balancers).Error; err != nil {
-			return err
-		}
-		for i := range balancers {
-			before := balancers[i].InboundIds
-			balancers[i].InboundIds = slices.DeleteFunc(before, func(b int) bool { return b == id })
-			if len(balancers[i].InboundIds) == len(before) {
-				continue
-			}
-			if err := tx.Save(&balancers[i]).Error; err != nil {
-				return err
-			}
-		}
 		if loadErr == nil && ib.NodeID != nil {
 			return (&NodeService{}).MarkNodeDirtyTx(tx, *ib.NodeID)
 		}