claudetool: remove knowledge base, focus on about sketch

We should have a more general kb.
Meanwhile, this is important and standalone.
Make it all clearer and sharper.
diff --git a/webui/src/web-components/sketch-tool-calls.ts b/webui/src/web-components/sketch-tool-calls.ts
index 99b0f21..a5afa50 100644
--- a/webui/src/web-components/sketch-tool-calls.ts
+++ b/webui/src/web-components/sketch-tool-calls.ts
@@ -4,7 +4,7 @@
 import { ToolCall } from "../types";
 import "./sketch-tool-card";
 import "./sketch-tool-card-take-screenshot";
-import "./sketch-tool-card-knowledge-base";
+import "./sketch-tool-card-about-sketch";
 
 @customElement("sketch-tool-calls")
 export class SketchToolCalls extends LitElement {
@@ -128,11 +128,11 @@
           .open=${open}
           .toolCall=${toolCall}
         ></sketch-tool-card-take-screenshot>`;
-      case "knowledge_base":
-        return html`<sketch-tool-card-knowledge-base
+      case "about_sketch":
+        return html`<sketch-tool-card-about-sketch
           .open=${open}
           .toolCall=${toolCall}
-        ></sketch-tool-card-knowledge-base>`;
+        ></sketch-tool-card-about-sketch>`;
     }
     return html`<sketch-tool-card-generic
       .open=${open}