fix: tag index page (#616)

quartz/components/pages/TagContent.tsx

@@ -27,7 +27,7 @@ function TagContent(props: QuartzComponentProps) {
       ? fileData.description
       : htmlToJsx(fileData.filePath!, tree)
 
-  if (tag === "") {
+  if (tag === "/") {
     const tags = [...new Set(allFiles.flatMap((data) => data.frontmatter?.tags ?? []))]
     const tagItemMap: Map<string, QuartzPluginData[]> = new Map()
     for (const tag of tags) {

quartz/plugins/emitters/tagPage.tsx

@@ -45,7 +45,7 @@ export const TagPage: QuartzEmitterPlugin<FullPageLayout> = (userOpts) => {
 
       const tagDescriptions: Record<string, ProcessedContent> = Object.fromEntries(
         [...tags].map((tag) => {
-          const title = tag === "" ? "Tag Index" : `Tag: #${tag}`
+          const title = tag === "index" ? "Tag Index" : `Tag: #${tag}`
           return [
             tag,
             defaultProcessedContent({