chore(release): v1.7.0-beta1

[biz87]

Summary

• Bump version to 1.7.0-beta1 in _build/config.inc.php, MiniShop3.php
• Restructure CHANGELOG.md: separate 1.7.0-beta1 and 1.6.0-beta1 sections
• Add missing [Bug] Исчезла кнопка "копировать" у категорий и у товаров #128/fix(manager): cast permission flags to int for MODX JS strict comparison #133 fix, move refactor(lk): integrate standalone modules, add confirm dialog #126 to 1.6.0, move fix(build): ensure 'desc' key exists in snippet and source properties #127 to 1.7.0
• Update changelog.txt with full 1.7.0-beta1 release notes

What's in 1.7.0-beta1

• feat: inline-edit (feat(grid): inline edit for category products table #134), formatted placeholders (feat: add _formatted placeholders for currency and weight display #147), custom order fields (feat: support custom fields in order validation #135)
• refactor: gallery ExtJS→Vue (refactor: migrate product gallery from ExtJS to Vue #150), remove grid_fields (refactor(category): remove unused ms3_category_grid_fields and dead code #146), simplify GetList (refactor(product): simplify Product\GetList — remove non-combo logic #152)
• fix: fix(product): improve options parsing and empty options handling #149, fix(category): restore visual editor (TinyMCE) for product category content #156, fix: удаление опций товара и пропажа «создать Документ» (Fixes #153) #158, fix(manager): cast permission flags to int for MODX JS strict comparison #133, fix: add MODX table prefix to relation field table names #136, fix: implement server-side sorting for customers grid #137, fix: display order status in customer order history #139, fix: absolute URLs in customer orders filter and pagination #141, fix: absolute URLs in customer address management #142, fix(build): ensure 'desc' key exists in snippet and source properties #127
• breaking: cost_formatted now includes currency symbol (feat: add _formatted placeholders for currency and weight display #147)