v1.0.0

First public release.

• [mca_price_calc] shortcode: an interactive price-estimate calculator plus a price-list accordion (show="both|calc|price").
• React settings screen with a live preview: editable prices, formula parameters, texts, design tokens, per-zone overrides, and custom CSS.
• JSON settings export/import and reset to defaults.
• REST API behind manage_options and nonce, with server-side whitelist sanitization.
• Ships with a generic English example configuration and is fully translation-ready (POT included).

Install: download mca-price-calculator-1.0.0.zip below, then Plugins -> Add New -> Upload Plugin.