Add feature to render chat bubble images in collapsed tool calls

- Intercept tool call messages in chat and render markdown images

- Add setting to toggle feature on/off

- Add proper styling for rendered images

- Handle mutation observer for new messages

- Hide rendered images when details element is opened

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

example.html

@@ -10,6 +10,11 @@
                 <label for="sillybubble_enabled">Enable SillyBubble</label>
             </div>
 
+            <div class="sillybubble_block flex-container">
+                <input id="sillybubble_render_in_collapse" type="checkbox" />
+                <label for="sillybubble_render_in_collapse">Render bubbles in collapsed tool calls</label>
+            </div>
+
             <div class="sillybubble_block flex-container">
                 <label for="sillybubble_image_url">Image Service URL:</label>
                 <input id="sillybubble_image_url" type="text" class="text_pole" />