Merge d114984124 into 54d6654ad1

src/fsyncdirsdlg.lfm

@@ -197,7 +197,10 @@ object frmSyncDirsDlg: TfrmSyncDirsDlg
         Width = 82
         Caption = 'asymmetric'
         Enabled = False
+        Hint = 'One-way mirror: right panel becomes an exact copy of the left. Right-only files are deleted; right-newer files are overwritten by left.'
         ParentFont = False
+        ParentShowHint = False
+        ShowHint = True
         TabOrder = 0
       end
       object chkSubDirs: TCheckBox

src/fsyncdirsdlg.pas

@@ -465,7 +465,12 @@ begin
             end;
             if R.FAction = srsUnknown then
             begin
-              R.FAction := R.FState;
+              // Mirror asymmetric logic from TFileSyncRec.Recalc:
+              // in asymmetric mode srsNotEq means left wins → srsCopyRight.
+              if chkAsymmetric.Checked and (R.FState = srsNotEq) then
+                R.FAction := srsCopyRight
+              else
+                R.FAction := R.FState;
             end;
           except
             on E: Exception do
@@ -562,11 +567,19 @@ begin
       if FileTimeDiff < 0 then
         FState := srsCopyLeft;
   end;
-  if FForm.chkAsymmetric.Checked and (FState = srsCopyLeft) then
-    FAction := srsDoNothing
-  else begin
+  if FForm.chkAsymmetric.Checked then
+  begin
+    // In asymmetric/mirror mode left is unconditionally authoritative.
+    // srsCopyLeft means right is newer — left still wins (overwrite right).
+    // srsNotEq means ambiguous diff (e.g. content check) — left still wins.
+    if FState in [srsCopyLeft, srsNotEq] then
+      FAction := srsCopyRight
+    else
+      FAction := FState;
+  end
+  else
     FAction := FState;
-  end;
+end;
 end;
 
 { TfrmSyncDirsDlg }