Refresh diagrams on intro page

Signed-off-by: Dan Barr <6922515+danbarr@users.noreply.github.com>

Author: danbarr

docs/toolhive/index.mdx

@@ -85,16 +85,13 @@ made up of four key components: the Runtime, Registry Server, Gateway, and
 Portal.
 
 <ThemedImage
-  alt='ToolHive platform architecture overview'
+  alt='ToolHive overview diagram'
   sources={{
-    light: useBaseUrl('/img/toolhive/toolhive-platform-light.svg'),
-    dark: useBaseUrl('/img/toolhive/toolhive-platform-dark.svg'),
+    light: useBaseUrl('/img/toolhive/toolhive-diagram-light.svg'),
+    dark: useBaseUrl('/img/toolhive/toolhive-diagram-dark.svg'),
   }}
-  title='ToolHive platform architecture overview'
+  title='ToolHive overview diagram'
   width={'800px'}
-  style={{
-    paddingBottom: '1rem',
-  }}
 />
 
 ### Runtime
@@ -159,6 +156,16 @@ admins and users:
 4. **Gateway** handles all inbound traffic, secures context and credentials,
    optimizes tool selection, and applies organizational policies.
 
+<ThemedImage
+  alt='ToolHive platform architecture overview'
+  sources={{
+    light: useBaseUrl('/img/toolhive/toolhive-platform-light.svg'),
+    dark: useBaseUrl('/img/toolhive/toolhive-platform-dark.svg'),
+  }}
+  title='ToolHive platform architecture overview'
+  width={'800px'}
+/>
+
 ## Why ToolHive?
 
 We want to help you get real value from MCP servers. While there are plenty of