diff --git a/apps/web/messages/en.json b/apps/web/messages/en.json
index c423282a..92aac771 100644
--- a/apps/web/messages/en.json
+++ b/apps/web/messages/en.json
@@ -2200,12 +2200,17 @@
         "groupCount": "{count} 次",
         "status": {
           "green": "已回綠",
-          "sealed_waiting_window": "已封口，等待視窗",
+          "sealed_waiting_window": "已封口，觀察中",
           "needs_investigation": "仍需調查",
           "insufficient_diagnostics": "診斷不足",
           "diagnostics_unavailable": "診斷不可用",
           "unknown": "狀態待查"
         },
+        "observation": {
+          "title": "處置結論：觀察中，不需人工介入",
+          "detail": "已知失敗來源已封口，待查群組為 0；W-1 不再升級 META，預估 {greenAt} 回綠。",
+          "greenAtFallback": "rolling window"
+        },
         "stat": {
           "successRate": "成功率",
           "successRateDetail": "{success}/{total} 目前樣本",
diff --git a/apps/web/messages/zh-TW.json b/apps/web/messages/zh-TW.json
index c423282a..92aac771 100644
--- a/apps/web/messages/zh-TW.json
+++ b/apps/web/messages/zh-TW.json
@@ -2200,12 +2200,17 @@
         "groupCount": "{count} 次",
         "status": {
           "green": "已回綠",
-          "sealed_waiting_window": "已封口，等待視窗",
+          "sealed_waiting_window": "已封口，觀察中",
           "needs_investigation": "仍需調查",
           "insufficient_diagnostics": "診斷不足",
           "diagnostics_unavailable": "診斷不可用",
           "unknown": "狀態待查"
         },
+        "observation": {
+          "title": "處置結論：觀察中，不需人工介入",
+          "detail": "已知失敗來源已封口，待查群組為 0；W-1 不再升級 META，預估 {greenAt} 回綠。",
+          "greenAtFallback": "rolling window"
+        },
         "stat": {
           "successRate": "成功率",
           "successRateDetail": "{success}/{total} 目前樣本",
diff --git a/apps/web/src/app/[locale]/governance/tabs/slo-tab.tsx b/apps/web/src/app/[locale]/governance/tabs/slo-tab.tsx
index e1b9987f..68637325 100644
--- a/apps/web/src/app/[locale]/governance/tabs/slo-tab.tsx
+++ b/apps/web/src/app/[locale]/governance/tabs/slo-tab.tsx
@@ -281,6 +281,7 @@ function closureStatusKey(value?: string | null): string {
 function diagnosticTone(status?: string | null, openGroups = 0): string {
   if (openGroups > 0 || status === 'needs_investigation') return '#FF3300'
   if (status === 'green') return '#22C55E'
+  if (status === 'sealed_waiting_window' && openGroups === 0) return '#0EA5E9'
   if (status === 'diagnostics_unavailable') return '#87867f'
   return '#F59E0B'
 }
@@ -451,6 +452,7 @@ function AutoExecuteDiagnosticsPanel({ diagnostics }: { diagnostics?: AutoExecut
   const projectedAt = formatShortDate(diagnostics?.projected_green_at)
   const rateLabel = rate == null ? '--' : `${(rate * 100).toFixed(1)}%`
   const thresholdLabel = `${(threshold * 100).toFixed(0)}%`
+  const observationOnly = diagnostics?.status === 'sealed_waiting_window' && openGroups === 0
 
   const statItems = [
     { key: 'successRate', icon: CheckCircle2, value: rateLabel, detail: t('stat.successRateDetail', { success, total }) },
@@ -498,6 +500,29 @@ function AutoExecuteDiagnosticsPanel({ diagnostics }: { diagnostics?: AutoExecut
           </div>
         </div>
 
+        {observationOnly && (
+          <div style={{
+            display: 'grid',
+            gridTemplateColumns: 'auto minmax(0, 1fr)',
+            gap: 10,
+            alignItems: 'center',
+            padding: '10px 11px',
+            borderRadius: 6,
+            border: `0.5px solid ${tone}40`,
+            background: `${tone}10`,
+          }}>
+            <ShieldCheck size={16} style={{ color: tone, flexShrink: 0 }} />
+            <div style={{ minWidth: 0 }}>
+              <div style={{ fontFamily: 'Syne, sans-serif', fontSize: 12, fontWeight: 700, color: '#141413' }}>
+                {t('observation.title')}
+              </div>
+              <div style={{ marginTop: 3, fontFamily: "'DM Mono', monospace", fontSize: 10, color: '#4b5563', lineHeight: 1.45 }}>
+                {t('observation.detail', { greenAt: projectedAt || t('observation.greenAtFallback') })}
+              </div>
+            </div>
+          </div>
+        )}
+
         <div style={{ display: 'grid', gridTemplateColumns: 'minmax(220px, 1.1fr) minmax(260px, 1.8fr)', gap: 14 }} className="slo-auto-diagnostics-grid">
           <div style={{ minWidth: 0 }}>
             <div style={{ display: 'flex', alignItems: 'baseline', justifyContent: 'space-between', gap: 10, marginBottom: 8 }}>
diff --git a/docs/LOGBOOK.md b/docs/LOGBOOK.md
index bdbacaf1..04c9a8d9 100644
--- a/docs/LOGBOOK.md
+++ b/docs/LOGBOOK.md
@@ -1,3 +1,33 @@
+## 2026-06-01｜治理 SLO 前端顯示已封口觀察中
+
+**背景**：
+
+- W-1 後端 watchdog 已把 `sealed_waiting_window + open_failure_group_count=0` 改成 observation-only，不再推 `META SYSTEM | 飛輪核心異常`。
+- 前端治理 SLO 面板原本只顯示「已封口，等待視窗」，operator 還是需要自己推理「是否需要人工介入、是否還會升級 META」。
+
+**本次調整**：
+
+- `apps/web/src/app/[locale]/governance/tabs/slo-tab.tsx`：
+  - `sealed_waiting_window` 且待查群組為 `0` 時，改用藍色 observation tone。
+  - 在自動修復紅燈診斷卡片加入短版處置結論：觀察中、不需人工介入、W-1 不再升級 META、預估回綠時間。
+- `apps/web/messages/zh-TW.json` / `en.json`：
+  - `sealed_waiting_window` 顯示改成「已封口，觀察中」。
+  - 新增 observation conclusion 文案；英文語系仍維持繁中文案鏡像。
+
+**驗證**：
+
+- `node -e "JSON.parse(...zh-TW/en...)"` → `json ok`
+- `pnpm --filter @awoooi/web typecheck`
+- `NEXT_PUBLIC_API_URL=https://awoooi.wooo.work NEXT_PRIVATE_BUILD_WORKER_COUNT=1 pnpm --filter @awoooi/web build`
+- `python3 scripts/security/security-mirror-progress-guard.py --root .` → `SECURITY_MIRROR_PROGRESS_GUARD_OK`
+- `git diff --check`
+
+**目前整體進度（本階段完成後）**：
+
+- W-1 前後端觀察中語義：約 `97%`；後端已降噪，前端也能直接看出不需人工介入，剩餘需部署後 browser readback。
+- W-1 自動修復 SLO 可解釋化：約 `93%`；診斷、Meta 降噪與治理面板已對齊。
+- 完整 AI 自動化飛輪總進度：維持 `61%`；這是操作介面清晰度提升，不新增 verified auto-repair 樣本。
+
 ## 2026-06-01｜W-1 已封口 SLO 改為觀察中，停止 Meta 誤擾
 
 **背景**：