优化结构

internal/config/runtime.go

@@ -268,23 +268,7 @@ func (r *Store) watchLoop(watcher *fsnotify.Watcher, stop <-chan struct{}, done
 				// take down a running process or publish invalid state.
 				continue
 			}
-			current := r.Snapshot()
-			if next.Admin == nil {
-				next.Admin = &Admin{}
-			}
-			// Storage and Email move to database-backed integration settings after
-			// first initialization. External config file edits must not erase the
-			// active values when those sections are absent from config.yaml.
-			if current != nil && current.Admin != nil {
-				if next.Admin.Storage == nil {
-					next.Admin.Storage = cloneStorage(current.Admin.Storage)
-				}
-				if next.Admin.Email == nil && current.Admin.Email != nil {
-					email := *current.Admin.Email
-					next.Admin.Email = &email
-				}
-			}
-			r.Replace(next)
+			r.Replace(MergeRuntimeConfig(r.Snapshot(), next))
 		case _, ok := <-errors:
 			// fsnotify errors are intentionally non-fatal; the watcher remains
 			// useful for subsequent events and Close always terminates it.