feat: 首頁議題排序加入公民/志願者角色切換，最新排序改用最新活動日期（#77） - #78
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- listIssues() 以子查詢計算 last_activity_at（素材/意見/說明頁 abuse_flagged IN (0,1) 的最新 created_at，無則 fallback 到 created_at） - 抽出 src/lib/homeSorting.ts 純函式：citizen 過濾 collecting；volunteer 顯示全部且 collecting 固定排最前 - newest 排序改以 last_activity_at 為準 - Home.vue 新增角色切換鈕（樣式比照排序鈕，token 不硬寫顏色） - i18n zh-TW/en 同步新增 idx_role_label/citizen/volunteer - 新增 src/tests/homeSorting.test.ts（node:sqlite 跑真實 SQL + 純函式測試）
- migration 0011：ct_issues 新增可 NULL 的 last_activity_at，回填三類子內容 （abuse_flagged IN (0,1)）的最新 created_at；無子內容則維持 NULL（尚無活動）， 不回填 created_at（僅套用本機，未動遠端） - 寫入路徑：createMaterial／createOpinion／createBriefing／updateLatestBriefing 統一經 touchIssueActivity() 更新欄位；moderation-hidden 投稿也算活動， 不受 skipStatusTransition 影響 - 讀取路徑：listIssues 改用 COALESCE(last_activity_at, created_at) 欄位版， 捨棄 COALESCE 子查詢（抓不到 updateLatestBriefing 的原地更新）； listIssuesWithAuthor 同步補上同欄位 - homeSorting newest 排序對 NULL 做 created_at fallback - 測試：seed 加入 last_activity_at 欄位；新增四個寫入路徑測試與 NULL fallback 測試（node:sqlite 真資料庫驗證）
- createMaterial／createOpinion／createBriefing 只在非 moderationHidden 投稿時呼叫 touchIssueActivity()，與 migration 0011 回填 （abuse_flagged IN (0, 1)）及公開查詢 material_count／opinion_count 口徑一致 - updateLatestBriefing 維持無條件 touch：getLatestBriefing() 已過濾 IN (0, 1)，UPDATE 本來就只觸及非隱藏列（補註解說明） - touchIssueActivity() docstring 改為說明隱藏投稿不算活動 - 測試補強：create* 三函式新增 INSERT 落表斷言；moderationHidden 投稿不更新 last_activity_at；順帶修復 createOpinion 遺失的 await .run()（INSERT 未執行）
Link1515
approved these changes
Aug 29, 2026
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摘要
解 GitHub issue #77——首頁新增「角色」切換（公民／志願者，預設公民）；公民不顯示「素材收集中」議題；志願者顯示全部且「素材收集中」固定排最前（第一階排序，階內套用使用者選的排序）；「最新」排序改以最新活動日期為準（素材／意見投稿、說明頁更動），不再用議題建立日期。
實作重點
src/lib/homeSorting.ts（新）：純函式filterByRole／sortByOrder／filterAndSortHomeIssues，SSR 安全；last_activity_at為 NULL 時 fallback 到created_atmigrations/0011_issue_last_activity.sql：ct_issues新增last_activity_at DATETIME欄位並回填（三類子內容abuse_flagged IN (0,1)的MAX(created_at)；無子內容者維持 NULL；abuse_flagged = 3一併回填）。採欄位版是因為updateLatestBriefing()是原地 UPDATE，子表MAX(created_at)抓不到說明頁更動src/db/queries.ts：新增touchIssueActivity()helper，四個寫入路徑（createMaterial／createOpinion／createBriefing／updateLatestBriefing）同步維護欄位。隱藏投稿（moderation-hidden，abuse_flagged = 3）不算活動——touch 只在非隱藏投稿呼叫，與 migration 回填及公開查詢IN (0,1)口徑一致；updateLatestBriefing()無條件 touch（其 UPDATE 本就只觸及abuse_flagged IN (0,1)的列）；skipStatusTransition只影響狀態轉換，不影響口徑判斷。讀取層以COALESCE(last_activity_at, created_at)fallback；listIssuesWithAuthor()管理端同步補欄位；公開欄位維持列舉、無SELECT *src/views/Home.vue：viewerRoleref（預設 citizen）＋角色切換鈕群idx_role_label／idx_role_citizen／idx_role_volunteer，zh-TW/en 雙檔同步0011_issue_last_activity.sql尚未套用至遠端 D1（本機已套用並驗證：sqlite_master只新增ct_前綴業務表、回填值與子內容MAX(created_at)一致）。merge 前需取得授權套用遠端，且順序必須：先套 migration、再 deploy（否則每次素材／意見／說明頁投稿會 runtime errorno such column: last_activity_at）。驗證
vp check --no-fmt --no-lint零錯誤（63 files）vp test15 檔 / 91 測試全過（含src/tests/homeSorting.test.ts18 個：四個寫入路徑落表＋欄位更新、moderation-hidden 不更新、NULL fallback）vp run build成功Closes #77