merge origin/staging: timeline width/hollow marks (BUG-602/603) with conversation economy (BUG-604–606)

Keep both changelog entries, BUG_HISTORY 602–606, and both task-board rows at 待验收. Auto-merged chat.tsx retains inferenceMarks and collect-reply buttons.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/DESIGN.md

@@ -252,7 +252,7 @@ The birth-time rectification session is the consultation transcript plus a house
 - **Life-event evidence:** after deterministic questionnaire completion, render three structured event rows by default and allow up to six. Each row uses a domain select, a precision select, and a matching year/month/day control; free-form descriptions are not part of scoring.
 - **Candidate result:** keep the reported range, candidate interval, and active-time status visually separate. Delivery shows one range card: title (range + event count), up to three compare columns (time, relative likelihood, D9/D10/nakshatra traits, event-fit counts, next-12-month windows, “更像这个”), and the representative-minute boundary. An eight-method report sits in a closed `<details>` fold. Support numbers stay on the house board. Low confidence keeps evidence editing open; medium offers save or add evidence; high uses a separate confirmation action and never labels a column as the true birth time.
 - **Evidence accessibility:** every row keeps visible labels, validation errors use live regions, add/remove controls retain 44px targets, and scoring/confirmation loading states disable duplicate submission without hiding the existing evidence.
-- **One-question guide:** the guided journey renders only the persisted `nextAction` and one server-selected question. A deterministic question is visible immediately; Agent wording may replace it without changing the question identity, domain, precision request, progress, or permissions. The composer explicitly permits an approximate year. Stop on spoken collect is not a composer button: `CHOICE_STOP_LABEL` (“先这样，先看当前范围”) stays on choice cards, and generating turns keep “停止回答”. The readonly range line is a status sentence, not a stop control. Discriminator cards fold “为什么问这题” under the stem. Hovering or selecting an option does not reveal an `answer_impact` time line. The composer has no `rectification-step-state` status sentence and no `rectification-composer-meta`.
+- **One-question guide:** the guided journey renders only the persisted `nextAction` and one server-selected question. A deterministic question is visible immediately; Agent wording may replace it without changing the question identity, domain, precision request, progress, or permissions. The composer explicitly permits an approximate year. Spoken collect, when the focus is live and the turn is not busy, shows two 44px secondary buttons above the input, class `rectification-collect-reply` (not `rectification-step-state`): 「没有」 posts the same declined path as typing 没有; 「记不清」 posts skipped. Stop on spoken collect is not a composer button: `CHOICE_STOP_LABEL` (“先这样，先看当前范围”) stays on choice cards, and generating turns keep “停止回答”. The readonly range line is a status sentence, not a stop control. Discriminator cards fold “为什么问这题” under the stem. Hovering or selecting an option does not reveal an `answer_impact` time line. The method sentence (`vargaSentence`) lives in the expanded activity timeline, not in the spoken bubble. The composer has no `rectification-step-state` status sentence and no `rectification-composer-meta`.
 - **Draft review:** natural-language answers become one inline review card. The evidence domain is read-only and uses its Chinese label; precision controls which exact year, month, or day input is available. Incomplete drafts keep edit and skip paths visible, while confirmation is disabled until the structured date is valid. Status and errors use polite or assertive live regions without clearing the persisted journey.
 - **Scoring and retry:** `score_pending` is a quiet progress surface with cancellable bounded polling and no manual compare control. `retry_scoring` preserves the confirmed evidence and exposes one explicit retry action. Refresh and device changes resume from the persisted action rather than inferring progress from copy.
 - **Guided candidate states:** low confidence presents the saved candidate range and either another evidence question or a safe finish; medium confidence can save the range but never apply a representative minute; high confidence names both “候选时间” and “当前排盘使用时间” before explicit confirmation; ready states that the current chart time changed while the original report remains preserved. No state calls a candidate the true birth minute.