Add login/logout button, show navbar to owner

public/custom-style.css

@@ -16,7 +16,7 @@
   margin-left: 0;
 }
 
-.svg[class*=octicon] {
+.repo-title .svg[class*=octicon] {
   vertical-align: baseline;
 }
 

templates/base/head.tmpl

@@ -169,6 +169,26 @@
 
 		{{template "custom/body_inner_pre" .}}
 
+		{{if .IsSigned}}
+			{{if gt .SignedUser.MaxRepoCreation 0}}
+				{{/* a/the ‘first-class citizen’ gets the standard gitea navigation bar */}}
+				<div class="ui top secondary stackable main menu following bar light">
+					{{template "base/head_navbar" .}}
+				</div><!-- end bar -->
+			{{else}}
+				<a class="ui primary right corner label link-action" href data-url="{{AppSubUrl}}/user/logout" data-redirect="{{AppSubUrl}}/"
+					title="{{.i18n.Tr "signed_in_as"}} {{.SignedUser.Name}} — {{.i18n.Tr "sign_out"}}">
+					<i class="icon">{{svg "octicon-sign-out" 16}}</i>
+				</a>
+			{{end}}
+		{{else}}
+			<a class="ui{{if .PageIsSignIn}} active{{end}} right corner label" rel="nofollow" href="{{AppSubUrl}}/user/login?redirect_to={{.Link}}"
+				title="{{.i18n.Tr "sign_in"}}"
+			>
+				<i class="icon">{{svg "octicon-sign-in" 16}}</i>
+			</a>
+		{{end}}
+
 {{/*
 	</div>
 </body>