feat(front): add placeholder styling for empty editor paragraphs and include logo image

front/assets/css/main.css

@@ -118,7 +118,16 @@
   * {
     @apply border-border outline-ring/50;
   }
+
   body {
     @apply bg-background text-foreground;
   }
+}
+
+.tiptap p.is-editor-empty:first-child::before {
+  color: #adb5bd;
+  content: attr(data-placeholder);
+  float: left;
+  height: 0;
+  pointer-events: none;
 }