feat: 优化

app/src/main/java/io/legado/app/ui/book/read/config/TocRegexDialog.kt

@@ -189,7 +189,7 @@ class TocRegexDialog : BaseDialogFragment(), Toolbar.OnMenuItemClickListener {
                 rootView?.apply {
                     tocRule.name = tv_rule_name.text.toString()
                     tocRule.rule = tv_rule_regex.text.toString()
-                    viewModel.saveRule(tocRule, rule)
+                    viewModel.saveRule(tocRule)
                 }
             }
             cancelButton()

app/src/main/java/io/legado/app/ui/book/read/config/TocRegexViewModel.kt

@@ -11,14 +11,11 @@ import io.legado.app.utils.fromJsonArray
 
 class TocRegexViewModel(application: Application) : BaseViewModel(application) {
 
-    fun saveRule(rule: TxtTocRule, oldRule: TxtTocRule? = null) {
+    fun saveRule(rule: TxtTocRule) {
         execute {
             if (rule.serialNumber < 0) {
                 rule.serialNumber = App.db.txtTocRule().lastOrderNum + 1
             }
-            oldRule?.let {
-                App.db.txtTocRule().delete(oldRule)
-            }
             App.db.txtTocRule().insert(rule)
         }
     }