Fix display problems of members and teams unit (#26363)

Fix:
- display member count and team count in the menu bar

![image](7f03ced4-67e2-41ce-b19f-a992823726bb)
- Also display member unit in the menu bar if there are no hidden
members in public org

![image](31422ad6-7190-438d-8e99-8a4af9cce908)
- hidden member board when there's no seeable members.
In this org, we only have hidden members: 

![image](d749420b-554a-4483-8cd2-221df61b5ca7)
We will hidden the member board when doer is not the member of this org

![image](93bb782e-7d4d-4ad3-a096-133afbc51f8a)
Before:

![image](eafc0b3e-6218-42ab-a892-39645d08a5eb)
If you click the number in the members board, you will access the
members page, which is not expected.

![image](73d6dadc-0ef2-4ca9-8485-c5f4211bffb2)

---------

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: Giteabot <teabot@gitea.io>

modules/context/org.go

@@ -24,6 +24,7 @@ type Organization struct {
 	Organization     *organization.Organization
 	OrgLink          string
 	CanCreateOrgRepo bool
+	PublicMemberOnly bool // Only display public members
 
 	Team  *organization.Team
 	Teams []*organization.Team
@@ -172,6 +173,18 @@ func HandleOrgAssignment(ctx *Context, args ...bool) {
 	ctx.Org.OrgLink = org.AsUser().OrganisationLink()
 	ctx.Data["OrgLink"] = ctx.Org.OrgLink
 
+	// Member
+	ctx.Org.PublicMemberOnly = ctx.Doer == nil || !ctx.Org.IsMember && !ctx.Doer.IsAdmin
+	opts := &organization.FindOrgMembersOpts{
+		OrgID:      org.ID,
+		PublicOnly: ctx.Org.PublicMemberOnly,
+	}
+	ctx.Data["NumMembers"], err = organization.CountOrgMembers(opts)
+	if err != nil {
+		ctx.ServerError("CountOrgMembers", err)
+		return
+	}
+
 	// Team.
 	if ctx.Org.IsMember {
 		shouldSeeAllTeams := false
@@ -203,6 +216,7 @@ func HandleOrgAssignment(ctx *Context, args ...bool) {
 				return
 			}
 		}
+		ctx.Data["NumTeams"] = len(ctx.Org.Teams)
 	}
 
 	teamName := ctx.Params(":team")