webui: add diff display for patches

Co-Authored-By: sketch <hello@sketch.dev>
Change-ID: s2e9bdfb014ddec3ck
diff --git a/webui/src/web-components/sketch-tool-card-base.ts b/webui/src/web-components/sketch-tool-card-base.ts
index 8dcc887..9018275 100644
--- a/webui/src/web-components/sketch-tool-card-base.ts
+++ b/webui/src/web-components/sketch-tool-card-base.ts
@@ -118,7 +118,9 @@
             ? html`<div class="mb-2">${this.inputContent}</div>`
             : ""}
           ${this.resultContent
-            ? html`<div class="mt-2">${this.resultContent}</div>`
+            ? html`<div class="${this.inputContent ? "mt-2" : ""}">
+                ${this.resultContent}
+              </div>`
             : ""}
         </div>
       </div>