Review and fix the Delphi unit below:

// Add these type declarations at the top of the interface section
type
  TBindDirection = (bdTwoWay, bdToComponent, bdFromComponent);
  
  TComponentBindingInfo = record
    Component: TComponent;
    PropertyName: string;
    Direction: TBindDirection;
  end;
  
  TBindingDictionary = class(TDictionary<string, TComponentBindingInfo>)
  private
    FOwner: TQryRecInfo;
  public
    constructor Create(AOwner: TQryRecInfo);
    procedure UpdateComponents;
    procedure UpdateProperties;
  end;

// Add these fields to TQryRecInfo private section
private
  FBindings: TBindingDictionary;
  procedure ComponentChangeHandler(Sender: TObject);

// Add these methods to TQryRecInfo public section
public
  procedure Bind(const PropertyName: string; Component: TComponent; Direction: TBindDirection = bdTwoWay);
  procedure BindByHint;
  procedure Unbind(const PropertyName: string); overload;
  procedure Unbind(Component: TComponent); overload;
  procedure UnbindAll;
  property Bindings: TBindingDictionary read FBindings;

// Add this to TQryRecInfo.Create
constructor TQryRecInfo.Create;
begin
  inherited Create;
  FDirtyFields := TDictionary<string, Boolean>.Create;
  FPreviousValues := TDictionary<string, TValue>.Create;
  FBindings := TBindingDictionary.Create(Self);
end;

// Add this to TQryRecInfo.Destroy
destructor TQryRecInfo.Destroy;
begin
  UnbindAll;
  FBindings.Free;
  FDirtyFields.Free;
  FPreviousValues.Free;
  inherited;
end;

// Add these new implementation sections
constructor TBindingDictionary.Create(AOwner: TQryRecInfo);
begin
  inherited Create;
  FOwner := AOwner;
end;

procedure TBindingDictionary.UpdateComponents;
var
  Pair: TPair<string, TComponentBindingInfo>;
  PropValue: string;
  Component: TComponent;
  PropInfo: PPropInfo;
begin
  for Pair in Self do
  begin
    if not (Pair.Value.Direction in [bdTwoWay, bdToComponent]) then
      Continue;

    Component := Pair.Value.Component;
    if not Assigned(Component) then
      Continue;

    // Get formatted text value from the property
    PropValue := FOwner.GetFormattedText(Pair.Key);

    // Set component property based on its type
    PropInfo := GetPropInfo(Component.ClassInfo, Pair.Value.PropertyName);
    if not Assigned(PropInfo) then
      Continue;

    case PropInfo^.PropType^.Kind of
      tkString, tkLString, tkWString, tkUString:
        SetStrProp(Component, PropInfo, PropValue);
      tkFloat:
        if PropInfo^.PropType^ = TypeInfo(TDateTime) then
          SetFloatProp(Component, PropInfo, StrToDateTimeDef(PropValue, 0))
        else
          SetFloatProp(Component, PropInfo, StrToFloatDef(PropValue, 0));
      tkInteger:
        SetOrdProp(Component, PropInfo, StrToIntDef(PropValue, 0));
      tkInt64:
        SetInt64Prop(Component, PropInfo, StrToInt64Def(PropValue, 0));
      tkVariant:
        SetVariantProp(Component, PropInfo, PropValue);
    end;
  end;
end;

procedure TBindingDictionary.UpdateProperties;
var
  Pair: TPair<string, TComponentBindingInfo>;
  Component: TComponent;
  PropInfo: PPropInfo;
  PropValue: string;
  Context: TRttiContext;
  RttiType: TRttiType;
  RttiProp: TRttiProperty;
begin
  Context := TRttiContext.Create;
  try
    RttiType := Context.GetType(FOwner.ClassType);
    
    for Pair in Self do
    begin
      if not (Pair.Value.Direction in [bdTwoWay, bdFromComponent]) then
        Continue;

      Component := Pair.Value.Component;
      if not Assigned(Component) then
        Continue;

      // Get component property value
      PropInfo := GetPropInfo(Component.ClassInfo, Pair.Value.PropertyName);
      if not Assigned(PropInfo) then
        Continue;

      case PropInfo^.PropType^.Kind of
        tkString, tkLString, tkWString, tkUString:
          PropValue := GetStrProp(Component, PropInfo);
        tkFloat:
          if PropInfo^.PropType^ = TypeInfo(TDateTime) then
            PropValue := DateTimeToStr(GetFloatProp(Component, PropInfo))
          else
            PropValue := FloatToStr(GetFloatProp(Component, PropInfo));
        tkInteger:
          PropValue := IntToStr(GetOrdProp(Component, PropInfo));
        tkInt64:
          PropValue := IntToStr(GetInt64Prop(Component, PropInfo));
        tkVariant:
          PropValue := VarToStr(GetVariantProp(Component, PropInfo));
      else
        Continue;
      end;

      // Find and update the property using RTTI
      RttiProp := RttiType.GetProperty(Pair.Key);
      if Assigned(RttiProp) and RttiProp.IsWritable then
      begin
        case RttiProp.PropertyType.TypeKind of
          tkString, tkLString, tkWString, tkUString:
            RttiProp.SetValue(FOwner, PropValue);
          tkInteger:
            RttiProp.SetValue(FOwner, StrToIntDef(PropValue, 0));
          tkInt64:
            RttiProp.SetValue(FOwner, StrToInt64Def(PropValue, 0));
          tkFloat:
            if RttiProp.PropertyType.Handle = TypeInfo(TDateTime) then
              RttiProp.SetValue(FOwner, StrToDateTimeDef(PropValue, 0))
            else if RttiProp.PropertyType.Handle = TypeInfo(Currency) then
              RttiProp.SetValue(FOwner, StrToCurrDef(PropValue, 0))
            else
              RttiProp.SetValue(FOwner, StrToFloatDef(PropValue, 0));
          tkVariant:
            RttiProp.SetValue(FOwner, PropValue);
        end;
      end;
    end;
  finally
    Context.Free;
  end;
end;

procedure TQryRecInfo.ComponentChangeHandler(Sender: TObject);
begin
  if Sender is TComponent then
    FBindings.UpdateProperties;
end;

procedure TQryRecInfo.Bind(const PropertyName: string; Component: TComponent; Direction: TBindDirection = bdTwoWay);
var
  BindingInfo: TComponentBindingInfo;
  PropName: string;
begin
  if not Assigned(Component) then
    Exit;

  // Determine the appropriate component property to bind to
  PropName := '';
  if Component is TEdit then
    PropName := 'Text'
  else if Component is TLabel then
    PropName := 'Caption'
  else if Component is TDateTimePicker then
    PropName := 'Date'
  else if Component is TMemo then
    PropName := 'Text'
  else if Component is TComboBox then
    PropName := 'Text';

  if PropName = '' then
    Exit;

  // Create binding info
  BindingInfo.Component := Component;
  BindingInfo.PropertyName := PropName;
  BindingInfo.Direction := Direction;

  // Remove any existing binding for this property
  Unbind(PropertyName);

  // Add the new binding
  FBindings.Add(PropertyName, BindingInfo);

  // Set up change notification
  if Component is TEdit then
    TEdit(Component).OnChange := ComponentChangeHandler
  else if Component is TMemo then
    TMemo(Component).OnChange := ComponentChangeHandler
  else if Component is TComboBox then
    TComboBox(Component).OnChange := ComponentChangeHandler
  else if Component is TDateTimePicker then
    TDateTimePicker(Component).OnChange := ComponentChangeHandler;

  // Initial update
  FBindings.UpdateComponents;
end;

procedure TQryRecInfo.BindByHint;
var
  Context: TRttiContext;
  RttiType: TRttiType;
  Prop: TRttiProperty;
  Owner: TComponent;
  I: Integer;
  Component: TComponent;
begin
  Context := TRttiContext.Create;
  try
    RttiType := Context.GetType(Self.ClassType);
    
    // Get the owner component (form or frame)
    if FBindings.Count > 0 then
      Owner := FBindings.Items[0].Component.Owner
    else
      Exit;

    // Look through all components
    for I := 0 to Owner.ComponentCount - 1 do
    begin
      Component := Owner.Components[I];
      if (Component.Hint <> '') and Assigned(RttiType.GetProperty(Component.Hint)) then
        Bind(Component.Hint, Component);
    end;
  finally
    Context.Free;
  end;
end;

procedure TQryRecInfo.Unbind(const PropertyName: string);
var
  BindingInfo: TComponentBindingInfo;
begin
  if FBindings.TryGetValue(PropertyName, BindingInfo) then
  begin
    // Remove change handler
    if BindingInfo.Component is TEdit then
      TEdit(BindingInfo.Component).OnChange := nil
    else if BindingInfo.Component is TMemo then
      TMemo(BindingInfo.Component).OnChange := nil
    else if BindingInfo.Component is TComboBox then
      TComboBox(BindingInfo.Component).OnChange := nil
    else if BindingInfo.Component is TDateTimePicker then
      TDateTimePicker(BindingInfo.Component).OnChange := nil;

    FBindings.Remove(PropertyName);
  end;
end;

procedure TQryRecInfo.Unbind(Component: TComponent);
var
  Pair: TPair<string, TComponentBindingInfo>;
  ToRemove: TArray<string>;
  PropName: string;
begin
  SetLength(ToRemove, 0);
  for Pair in FBindings do
  begin
    if Pair.Value.Component = Component then
    begin
      SetLength(ToRemove, Length(ToRemove) + 1);
      ToRemove[High(ToRemove)] := Pair.Key;
    end;
  end;

  for PropName in ToRemove do
    Unbind(PropName);
end;

procedure TQryRecInfo.UnbindAll;
var
  PropNames: TArray<string>;
  PropName: string;
begin
  PropNames := FBindings.Keys.ToArray;
  for PropName in PropNames do
    Unbind(PropName);
end;
end.