docs(tasks): export dialog polish brief (agent loop, issue #90)

The English-unavailable note moves from a line inside the dialog to one
top toast per open; selected states take the theme accent on borders,
dots and boxes with neutral backgrounds. Reverses the DESIGN.md neutral
selected-state sentence; BUG-1078's no-dark-block rule stays.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LutgzyJqNhPpZy1nFsJtN3

docs/tasks/README.md

@@ -513,3 +513,4 @@
 | `TASK-synastry-report-chat-fix-20261020.md` | `PROGRESS-synastry-report-chat-20261018.md` | 大运核对要认报告里的「小运」和英文 mahadasha / antardasha；预填文案只留一句 | 已验收 | `549e37b99` |
 | `TASK-other-subject-birth-time-edit-20261021.md` | — | 其他人的出生时间可以修改（去掉 `chart_profiles_guard_birth` 的填报时间不可改；推翻 people-archive P1 §验收 2 该条；active 锁不变） | 排队（等 #86 合入） | `codex/other-subject-birth-time-edit-20261021`；动表；不进循环 |
 | `TASK-chart-ascendant-slash-20261021.md` | — | #87 上升状态格「不适用」改「/」+ 悬停 / 点按说明；报告上升行同改并在表下加说明（推翻 10-15 口径） | 待领取（等 #86 合入） | `codex/chart-ascendant-slash-20261021` |
+| `TASK-report-export-dialog-polish-20261021.md` | — | #90 导出弹窗：英文不可用说明改顶部浮层（每次打开一次）；选中态描边 / 圆点 / 勾选框用主题色、底色中性（推翻 DESIGN「Selected states use canvas-muted + ink」，BUG-1078 主语保留） | 待领取（可与 #89 并行） | `codex/report-export-dialog-polish-20261021` |