fix: add space in Authorization header for Claude Code snippet

'Authorization:Bearer' -> 'Authorization: Bearer' per HTTP spec.
Missing space could cause header parsing failures on strict servers.

Skipped preview-in-config finding: ConnectionTest already uses
session JWT (fixed in prior commit). Config snippets intentionally
show masked preview (ci_80ba...e980) as a visual hint -- the '...'
masking clearly signals 'replace with your key'.

Author: DevanshuNEU

frontend/src/pages/APIKeysPage.tsx

@@ -313,7 +313,7 @@ function ConnectGuide({ activeKeyPreview, sessionToken }: { activeKeyPreview: st
       hint: 'Run in terminal',
       config: `claude mcp add codeintel \\
   --transport http \\
-  --header "Authorization:Bearer ${keyDisplay}" \\
+  --header "Authorization: Bearer ${keyDisplay}" \\
   https://mcp.opencodeintel.com/mcp`,
     },
     cursor: {