BRIEF: ADR-1.0.17 — UI docs and screenshots

[ahuimanu]

BRIEF: UI docs, patterns, and screenshots

Goal

• Document the Bootstrap 5 + HTMX UI stack, component patterns, and provide screenshots/snippets to satisfy ADR-1.0.17 attestation.

Scope (single PR)

• Files to touch: docs/ux/ui-stack.md (new or updated), add screenshots under docs/travelmathlite/ui/ (or existing docs path), optionally link from README. Include HTML snippets showing navbar, forms, pagination, alerts, and HTMX partial conventions.
• Behavior: Write a concise UI stack guide: asset sources/pins, includes (navbar/footer/alerts/pagination), form/button/pagination patterns, HTMX usage guidelines, and how to add overrides. Capture screenshots of key pages (home, calculators, search, airports) showing Bootstrap styling and responsive navbar.
• Non-goals: New UI features; restyling beyond documentation.

Standards

• Commits: conventional (docs).
• No secrets; env via settings.
• Django tests: N/A (docs/screenshots only).

Acceptance

• User flow: Contributors can read the UI guide to understand how to use Bootstrap/HTMX, where includes live, and how to keep styles consistent; screenshots exist for attestation.
• Include migration? no
• Update docs & PR checklist.

Prompts for Copilot

• "Draft UI stack docs covering Bootstrap/HTMX assets, includes, form/button/pagination patterns, and HTMX partial guidelines; add screenshots."
• "Link the UI guide from README or relevant docs index."