Function build_view_context 

pub fn build_view_context(name: &str, description: &str) -> (String, String)

Assemble system and user prompts for AI view generation.

Returns (system_prompt, user_prompt) where:

• System prompt: role, rules, component catalog, few-shot example (static, cacheable)
• User prompt: project models, routes, view name and description (dynamic, per-request)