revert: remove fork-only changes from release sync

Revert payment/wechat, sora/claude-max cleanup, fork-only migrations,
and cosmetic changes that were brought in by the release sync commit.
Keep only channel-monitor related improvements:
- PublicSettingsInjectionPayload named struct with drift test
- ChannelMonitorRunner graceful shutdown in wire
- image_output_price in SupportedModelChip
- Simplified buildSelfNavItems in AppSidebar
- Gateway WARN logs for 503 branches

backend/internal/repository/account_repo.go

@@ -313,31 +313,6 @@ func (r *accountRepository) ListCRSAccountIDs(ctx context.Context) (map[string]i
 	return result, nil
 }
 
-// CountByTLSFingerprintProfile 按 TLS 指纹模板 ID 聚合绑定账号数。
-// 走 108_add_tls_fingerprint_profile_id_index.sql 的表达式索引。
-func (r *accountRepository) CountByTLSFingerprintProfile(ctx context.Context) (map[int64]int, error) {
-	rows, err := r.sql.QueryContext(ctx, `
-		SELECT (extra->>'tls_fingerprint_profile_id')::bigint AS profile_id, COUNT(*)
-		FROM accounts
-		WHERE deleted_at IS NULL AND extra ? 'tls_fingerprint_profile_id'
-		GROUP BY profile_id`)
-	if err != nil {
-		return nil, err
-	}
-	defer func() { _ = rows.Close() }()
-
-	counts := make(map[int64]int)
-	for rows.Next() {
-		var id int64
-		var n int
-		if err := rows.Scan(&id, &n); err != nil {
-			return nil, err
-		}
-		counts[id] = n
-	}
-	return counts, rows.Err()
-}
-
 func (r *accountRepository) Update(ctx context.Context, account *service.Account) error {
 	if account == nil {
 		return nil

backend/internal/repository/gateway_cache.go

@@ -9,9 +9,7 @@ import (
 	"github.com/redis/go-redis/v9"
 )
 
-const (
-	stickySessionPrefix = "sticky_session:"
-)
+const stickySessionPrefix = "sticky_session:"
 
 type gatewayCache struct {
 	rdb *redis.Client
@@ -43,6 +41,12 @@ func (c *gatewayCache) RefreshSessionTTL(ctx context.Context, groupID int64, ses
 }
 
 // DeleteSessionAccountID 删除粘性会话与账号的绑定关系。
+// 当检测到绑定的账号不可用（如状态错误、禁用、不可调度等）时调用，
+// 以便下次请求能够重新选择可用账号。
+//
+// DeleteSessionAccountID removes the sticky session binding for the given session.
+// Called when the bound account becomes unavailable (e.g., error status, disabled,
+// or unschedulable), allowing subsequent requests to select a new available account.
 func (c *gatewayCache) DeleteSessionAccountID(ctx context.Context, groupID int64, sessionHash string) error {
 	key := buildSessionKey(groupID, sessionHash)
 	return c.rdb.Del(ctx, key).Err()

backend/internal/repository/usage_log_repo.go

@@ -3080,7 +3080,7 @@ func (r *usageLogRepository) GetGroupStatsWithFilters(ctx context.Context, start
 	query := `
 		SELECT
 			COALESCE(ul.group_id, 0) as group_id,
-			COALESCE(g.name, '(无分组)') as group_name,
+			COALESCE(g.name, '') as group_name,
 			COUNT(*) as requests,
 			COALESCE(SUM(ul.input_tokens + ul.output_tokens + ul.cache_creation_tokens + ul.cache_read_tokens), 0) as total_tokens,
 			COALESCE(SUM(ul.total_cost), 0) as cost,