Blankey 0.2.5

• Template bindings written as plain text (buyer.name instead of {{ buyer.name }}) are refused when a template is
  saved, and check_bindings reports existing ones as literal instead of ok.
• request_fill refuses to open the fill form while a variable would start from a template default that gives no vault
  value, and lists the profile keys to map in paths; allow_defaults: true opens it anyway. The MCP instructions and
  the collection link's next step tell the assistant to map every variable to a profile key before filling.