feat: light/dark variant icons and selfh.st tag as default category

- code refactor
- reduce memory usage

internal/route/provider/docker_test.go

@@ -81,7 +81,7 @@ func TestApplyLabel(t *testing.T) {
 			"proxy.a.middlewares.request.set_headers.X-Header":  "value1",
 			"proxy.a.middlewares.request.add_headers.X-Header2": "value2",
 			"proxy.a.homepage.show":                             "true",
-			"proxy.a.homepage.icon":                             "png/adguard-home.png",
+			"proxy.a.homepage.icon":                             "@selfhst/adguard-home.png",
 			"proxy.a.healthcheck.path":                          "/ping",
 			"proxy.a.healthcheck.interval":                      "10s",
 		},
@@ -127,9 +127,8 @@ func TestApplyLabel(t *testing.T) {
 	expect.Equal(t, b.Container.IdlewatcherConfig.StopSignal, "SIGTERM")
 
 	expect.Equal(t, a.Homepage.Show, true)
-	expect.Equal(t, a.Homepage.Icon.Value, "png/adguard-home.png")
 	expect.Equal(t, a.Homepage.Icon.Extra.FileType, "png")
-	expect.Equal(t, a.Homepage.Icon.Extra.Name, "adguard-home")
+	expect.Equal(t, a.Homepage.Icon.Extra.Ref, "adguard-home")
 
 	expect.Equal(t, a.HealthCheck.Path, "/ping")
 	expect.Equal(t, a.HealthCheck.Interval, 10*time.Second)

internal/route/route.go

@@ -479,35 +479,29 @@ func (r *Route) FinalizeHomepageConfig() {
 	r.Homepage = r.Homepage.GetOverride(r.Alias)
 
 	hp := r.Homepage
+	ref := r.Reference()
+	meta, ok := homepage.GetHomepageMeta(ref)
+	if ok {
+		if hp.Name == "" {
+			hp.Name = meta.DisplayName
+		}
+		if hp.Category == "" {
+			hp.Category = meta.Tag
+		}
+	}
 
-	var key string
 	if hp.Name == "" {
-		if r.Container != nil {
-			key = r.Container.Image.Name
-		} else {
-			key = r.Alias
-		}
-		displayName, ok := homepage.GetDisplayName(key)
-		if ok {
-			hp.Name = displayName
-		} else {
-			hp.Name = strutils.Title(
-				strings.ReplaceAll(
-					strings.ReplaceAll(key, "-", " "),
-					"_", " ",
-				),
-			)
-		}
+		hp.Name = strutils.Title(
+			strings.ReplaceAll(
+				strings.ReplaceAll(ref, "-", " "),
+				"_", " ",
+			),
+		)
 	}
 
 	if hp.Category == "" {
 		if config.GetInstance().Value().Homepage.UseDefaultCategories {
-			if isDocker {
-				key = r.Container.Image.Name
-			} else {
-				key = strings.ToLower(r.Alias)
-			}
-			if category, ok := homepage.PredefinedCategories[key]; ok {
+			if category, ok := homepage.PredefinedCategories[ref]; ok {
 				hp.Category = category
 			}
 		}