refactor: prefine for version v1.0.2 (#269)

* refactor: refactor navigateVector logic and remove unused functions

* refactor: refactor HTML structure and styling in single.html

- Modify the `.info` class to `article` in `_article.scss`
- Remove the `nav.html` partial in `single.html`
- Change the class name from `info` to `article` in `single.html`
- Add the `nav.html` partial in `single.html`

* refactor: update handling of 404 page
- Now hugo will set unknown page title as "404"
- Add condition to return an empty image array if the document title starts with "404"

* docs: update documentation

assets/ts/resources.ts

@@ -11,6 +11,9 @@ export interface ImageJSON {
 }
 
 export async function initResources(): Promise<ImageJSON[]> {
+  if (document.title.split(' | ')[0] === '404') {
+    return [] // no images on 404 page
+  }
   try {
     const response = await fetch(`${window.location.href}index.json`, {
       headers: {