feat: add resizable image component and rich text editor with image upload support

app/globals.css

@@ -496,3 +496,95 @@ body {
     -webkit-backdrop-filter: none !important;
   }
 }
+
+/* TipTap Rich Text Editor */
+.tiptap {
+  outline: none;
+}
+
+.tiptap p {
+  margin: 0.25rem 0;
+}
+
+.tiptap h1 {
+  font-size: 1.5rem;
+  font-weight: 700;
+  margin: 0.5rem 0;
+}
+
+.tiptap h2 {
+  font-size: 1.25rem;
+  font-weight: 600;
+  margin: 0.5rem 0;
+}
+
+.tiptap ul {
+  list-style-type: disc;
+  padding-left: 1.5rem;
+  margin: 0.25rem 0;
+}
+
+.tiptap ol {
+  list-style-type: decimal;
+  padding-left: 1.5rem;
+  margin: 0.25rem 0;
+}
+
+.tiptap li {
+  margin: 0.125rem 0;
+}
+
+.tiptap blockquote {
+  border-left: 3px solid var(--color-border);
+  padding-left: 1rem;
+  margin: 0.5rem 0;
+  color: var(--color-muted-foreground);
+}
+
+.tiptap pre {
+  background-color: var(--color-muted);
+  border: 1px solid var(--color-border);
+  border-radius: 0.375rem;
+  padding: 0.75rem;
+  font-family: monospace;
+  font-size: 0.875rem;
+  overflow-x: auto;
+  margin: 0.5rem 0;
+}
+
+.tiptap code {
+  background-color: var(--color-muted);
+  padding: 0.125rem 0.25rem;
+  border-radius: 0.25rem;
+  font-family: monospace;
+  font-size: 0.875rem;
+}
+
+.tiptap a {
+  color: var(--color-primary);
+  text-decoration: underline;
+  cursor: pointer;
+}
+
+.tiptap img {
+  max-width: 100%;
+  height: auto;
+}
+
+.tiptap hr {
+  border: none;
+  border-top: 1px solid var(--color-border);
+  margin: 1rem 0;
+}
+
+.tiptap p.is-editor-empty:first-child::before {
+  content: attr(data-placeholder);
+  float: left;
+  color: var(--color-muted-foreground);
+  pointer-events: none;
+  height: 0;
+}
+
+.tiptap .ProseMirror-selectednode img {
+  outline: none;
+}