v0.3.1: More admin UI improvements and bug fixes

This commit further refines the admin UI, and introduces a very SPA-like
creating process for links and categories. In-place editing has also
been improved, the styling is more correct and better formatted, as well
as having some cleaner code.

This PR also fixes a few bugs:
- Image uploads not being URL encoded, so special characters would break
  images
- If an image has exif, but no orientation tag, the image would be
  wrongfully rejected
- In-place editing forms were not correctly sized, and title inputs
  would not break with line breaks in the titles

This PR also greatly improves performance on the admin UI.

src/templates/views/index.hbs

@@ -76,17 +76,17 @@
     <div class="w-full sm:w-4/5 p-2.5">
         {{#each Categories}}
         <div class="flex items-center mt-2 first:mt-0">
-            <img class="object-contain mr-2 select-none" width="32" height="32" draggable="false" alt="{{this.Name}}"
-                src="{{this.Icon}}" />
+            <img class="object-contain mr-2 select-none size-8" width="32" height="32" draggable="false"
+                alt="{{this.Name}}" src="{{this.Icon}}" />
             <h2 class="capitalize break-all">{{this.Name}}</h2>
         </div>
         <div class="p-2.5 grid grid-cols-[repeat(auto-fill,_minmax(min(330px,_100%),_1fr))] gap-2">
             {{#each this.Links}} <a href="{{this.URL}}" class="link-card" draggable="false" target="_blank"
                 rel="noopener noreferrer">
-                <div>
+                <div data-img-container>
                     <img width="64" height="64" draggable="false" src="{{this.Icon}}" alt="{{this.Name}}" />
                 </div>
-                <div>
+                <div data-text-container>
                     <h3>{{this.Name}}</h3>
                     <p class="min-h-5">{{this.Description}}</p>
                 </div>