fix(docs): eliminate ~222 SEO redirect chains on docs.mem0.ai (#4768)

docs/vibecoding.mdx

@@ -12,7 +12,7 @@ We follow the llms.txt standard:
 - [llms.txt](https://docs.mem0.ai/llms.txt)
 
 <CardGroup cols={2}>
-  <Card title="Get an API Key" icon="key" href="https://app.mem0.ai">
+  <Card title="Get an API Key" icon="key" href="https://app.mem0.ai/login">
     Sign up for Mem0 Platform and start building
   </Card>
   <Card title="Quickstart" icon="rocket" href="/platform/quickstart">
@@ -34,7 +34,7 @@ Works with Claude Code, Cursor, Windsurf, and any assistant that supports skills
 
 Connect Claude, Claude Code, Cursor, Windsurf, VS Code, OpenCode, or any MCP-compatible client to Mem0.
 
-Get your API key from [app.mem0.ai](https://app.mem0.ai), then add Mem0 MCP with a single command:
+Get your API key from <a href="https://app.mem0.ai" rel="nofollow">app.mem0.ai</a>, then add Mem0 MCP with a single command:
 
 ```bash
 npx mcp-add \