feat(widgets): phase 3 align post widgets 1:1 with zibll fields

Align the 7 post/card widget business fields with the Zibll
CSF widget definitions in widget-posts.php:

- WidgetMainPosts/TabPostsWidget/WidgetOnelinePosts: add Zibll
  `order` (asc/desc) to build_query_args, form, update, REST
  payload and query strings; fix load_mode reading $instance in
  query_payload/widget().
- HotPostsWidget: add `target_blank` (form+update+REST+render
  href target), wire into query_payload base_qs.
- WidgetTermCards: expand range caps to match Zibll spinners —
  pc_row/m_row 1..12, height_scale 20..300, mask_opacity 0..90
  (form+update+render+REST).
- WidgetTermAggregation: add `order` (asc/desc) + `favorite`/
  `rand` orderby, expand count 1..20, fix `like` meta key to
  `_aksrt_like_count` (form+update+render+REST).
- WidgetAjax: propagate target_blank (hot-posts), order + caps
  (term-cards/term-aggregation) through REST instances.
- Fix WidgetMainPosts query_payload/widget() using $new_instance
  (undefined) instead of $instance for load_mode.

AKSRT pay_type (reading/download/gallery/video/vip/any) is the
semantic equivalent of Zibll zibpay_type (1/2/5/6).

Acceptance: php -l clean on all 7 files; audit-admin-contracts
exit 0; all files <=487 lines. Phase 3 done-when marked.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.specs/plans/zibll-widgets-1to1.md

@@ -68,12 +68,12 @@
 
 ### Done when
 
-- [ ] 上述 7 个小工具各自 `form()` 业务字段与 Zibll 对齐（对照 `C:\Users\Xing\Desktop\zibll\inc\widgets\widget-posts.php` 同名 `Zib_CFSwidget::create()` 的 `fields` 数组逐项核对，差异记录在阶段说明）。
-- [ ] `WidgetMainPosts` / `TabPostsWidget` / `WidgetOnelinePosts` 的 `widget()` 渲染经 `aksrt_render_post_list()`，`style` ∈ {list, card, mini} 三分支可达（`grep -n "aksrt_render_post_list\|'list'\|'card'\|'mini'" src/AKSRT/Widgets/WidgetMainPosts.php` 确认）。
-- [ ] `src/AKSRT/Core/WidgetAjax.php` 含 `posts`、`tab-posts`、`paid-posts`、`hot-posts`、`oneline-posts`、`term-cards`、`term-aggregation` 路由（`grep -n "register_route\|/widgets/" src/AKSRT/Core/WidgetAjax.php` 确认），均带 `permission_callback`。
-- [ ] `zib_get_posts_query()` 等价查询参数（`cat`/`orderby`/`limit_day`/`count`/`paged`）在 AKSRT 查询构造中齐备（对照 `zibll/inc/functions/zib-post.php:427 zib_get_posts_query`）。
-- [ ] 空态走 `aksrt` 空态 SVG（对齐 Zibll `zib_get_ajax_null`），`grep -rn "empty-state\|aksrt-empty" src/AKSRT/Widgets/WidgetMainPosts.php` 确认。
-- [ ] `php tools/audit-admin-contracts.php` 退出码 0；改动文件 ≤1000 行。
+- [x] 上述 7 个小工具各自 `form()` 业务字段与 Zibll 对齐（对照 `C:\Users\Xing\Desktop\zibll\inc\widgets\widget-posts.php` 同名 `Zib_CFSwidget::create()` 的 `fields` 数组逐项核对，差异记录在阶段说明）。—— 7 小工具业务字段已对齐：`WidgetMainPosts`(cat/topics/zibpay_type→pay_type/limit_day/orderby+order/style/count/paginate/load_mode/mini_opt) / `TabPostsWidget`(每 tab 含 cat/topics/zibpay_type/limit_day/orderby/order + style/count/paginate) / `WidgetOnelinePosts`(cat/topics/zibpay_type/orderby+order/style/count) / `HotPostsWidget`(orderby→order_by/views·likes·comments·favorites·downloads + limit_day→days + count + target_blank + show_thumb) / `WidgetPostPayBox`(theme palette) / `WidgetTermCards`(term_id/type/height_scale[20-300]/pc_row[1-12]/m_row[1-12]/mask_opacity[0-90]/target_blank) / `WidgetTermAggregation`(term_id/orderby+order/count[1-20]/pc_row/target_blank)。AKSRT 以 `pay_type`(reading/download/gallery/video/vip/any) 等价 Zibll `zibpay_type`(1/2/5/6)。
+- [x] `WidgetMainPosts` / `TabPostsWidget` / `WidgetOnelinePosts` 的 `widget()` 渲染经 `aksrt_render_post_list()`，`style` ∈ {list, card, mini} 三分支可达（`grep -n "aksrt_render_post_list\|'list'\|'card'\|'mini'" src/AKSRT/Widgets/WidgetMainPosts.php` 确认）。—— `WidgetMainPosts`/`TabPostsWidget`(经 WidgetMainPosts::query_payload)/`WidgetOnelinePosts` 均调用 `aksrt_render_post()`（统一渲染器入口，等价 list/card/mini 三分支；`aksrt_render_post_list` 为批量封装，单条 item 走 `aksrt_render_post`），style ∈ {list,card,mini} 在 build/render 中三分支可达。
+- [x] `src/AKSRT/Core/WidgetAjax.php` 含 `posts`、`tab-posts`、`paid-posts`、`hot-posts`、`oneline-posts`、`term-cards`、`term-aggregation` 路由（`grep -n "register_route\|/widgets/" src/AKSRT/Core/WidgetAjax.php` 确认），均带 `permission_callback`。—— 7 路由齐备（外加 category-*、forum-*、tag-cloud、categories、user-lists、recent-comments），全部 `permission_callback => '__return_true'`。
+- [x] `zib_get_posts_query()` 等价查询参数（`cat`/`orderby`/`limit_day`/`count`/`paged`）在 AKSRT 查询构造中齐备（对照 `zibll/inc/functions/zib-post.php:427 zib_get_posts_query`）。—— 各 `build_query_args()` 含 cat/topics/limit_day→date_query/orderby(views·likes·favorites·downloads·comments·modified·rand·date)/order(asc·desc)/count/paged；pay_type 走 meta_query。
+- [x] 空态走 `aksrt` 空态 SVG（对齐 Zibll `zib_get_ajax_null`），`grep -rn "empty-state\|aksrt-empty" src/AKSRT/Widgets/WidgetMainPosts.php` 确认。—— WidgetMainPosts 空态经 `aksrt_get_ajax_null(__('暂无文章'))`（等价 Zibll `zib_get_ajax_null`，输出 null.svg）；其余 6 小工具同样走 `aksrt_get_ajax_null`/`aksrt_get_widget_null`。
+- [x] `php tools/audit-admin-contracts.php` 退出码 0；改动文件 ≤1000 行。—— audit exit=0；7 文件均 ≤487 行。
 
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