fix: fix: hire-an-agent does not generate or store FORGE_<AGENT>_TOKEN for new users (#237)

bin/disinto

@@ -2745,7 +2745,10 @@ disinto_hire_an_agent() {
   else
     # Store token in .env under the role-specific variable name
     if grep -q "^${token_var}=" "$env_file" 2>/dev/null; then
-      sed -i "s|^${token_var}=.*|${token_var}=${agent_token}|" "$env_file"
+      # Use sed with alternative delimiter and proper escaping for special chars in token
+      local escaped_token
+      escaped_token=$(printf '%s\n' "$agent_token" | sed 's/[&/\]/\\&/g')
+      sed -i "s|^${token_var}=.*|${token_var}=${escaped_token}|" "$env_file"
       echo "  ${agent_name} token updated (${token_var})"
     else
       printf '%s=%s\n' "$token_var" "$agent_token" >> "$env_file"