fix(telegram): BUG-C TYPE-3 排版清洗 + 批准/拒絕永遠置頂（ADR-075 UI 第三波修復）

Checkpoint 1 — decision_manager.py TYPE-3 root_cause 清洗:
- 舊: root_cause=_smt(reasoning, 500) → debate_summary 全文（診斷/方案/審查/質疑）全部傾倒到 AI 診斷欄
- 新: _parse_debate_summary 只取 diagnosis 欄位 + _smt 截斷 300 字
- 移除 _requires_human 變數（已無用途）

Checkpoint 2 — telegram_gateway.py _build_inline_keyboard 按鈕順序重構:
- 舊: K8s 類別按鈕置頂，批准/拒絕受 requires_human_approval 控制 → 死卡
- 新: [✅ 批准][❌ 拒絕] 永遠第一行，K8s/DB/Host 操作按鈕置後
- 移除 requires_human_approval 參數（邏輯已簡化為無條件置頂）

修改範圍: decision_manager.py else 路由段 + _build_inline_keyboard + send_approval_card 簽名，
telegram_gateway.py 模板/訊息格式零改動。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/services/decision_manager.py

@@ -398,15 +398,16 @@ async def _push_decision_to_telegram(
             )
         else:
             # TYPE-2 / TYPE-3 / TYPE-4 都走 send_approval_card（按鈕組合由 alert_category 決定）
-            # 2026-04-17 ogt + Claude Sonnet 4.6: 傳入 requires_human_approval + 智能截斷
-            # 根因：① requires_human_approval=True 時動態按鈕卡缺少 [批准][拒絕] → 死卡
-            #        ② [:500] 在括號中間切斷 → 幽靈截斷「質疑：無（通」
-            _requires_human = bool(proposal_data.get("requires_human_review", False))
+            # 2026-04-17 ogt + Claude Sonnet 4.6 (BUG-C): TYPE-3 root_cause 清洗
+            # 舊：root_cause=_smt(reasoning, 500) → debate_summary 全文傾倒到 AI 診斷欄位
+            # 新：_parse_debate_summary 只取 diagnosis；方案/審查/質疑不在此卡顯示
+            _parsed_card = _parse_debate_summary(reasoning)
+            _card_root_cause = _smt(_parsed_card.get("diagnosis") or description, 300)
             tg_result = await gateway.send_approval_card(
                 approval_id=approval_id,
                 risk_level=risk_level,
                 resource_name=target[:50],
-                root_cause=_smt(reasoning, 500) if reasoning else _smt(description, 500),
+                root_cause=_card_root_cause,
                 suggested_action=action[:120] if action else (description[:120] if description else "待分析"),
                 estimated_downtime="5-15 min",
                 primary_responsibility="INFRA",
@@ -424,7 +425,6 @@ async def _push_decision_to_telegram(
                 alert_category=_alert_category,
                 notification_type=_notification_type,
                 playbook_name=_playbook_name,
-                requires_human_approval=_requires_human,
             )
 
         # 2026-04-09 Claude Sonnet 4.6: 存 message_id → 後續狀態更新在原訊息延續

apps/api/src/services/telegram_gateway.py

@@ -1422,9 +1422,6 @@ class TelegramGateway:
         # ADR-071-E: TYPE-3 動態按鈕 (2026-04-11 Claude Sonnet 4.6)
         alert_category: str = "",
         notification_type: str = "",
-        # 2026-04-17 ogt + Claude Sonnet 4.6: requires_human_approval 強制附加批准/拒絕行
-        # 根因：有動態按鈕時走 category 路徑，approve/reject 被漏掉 → 卡片成「死卡」
-        requires_human_approval: bool = False,
     ) -> dict:
         """
         建立 Inline Keyboard
@@ -1481,21 +1478,21 @@ class TelegramGateway:
         _dynamic_buttons = _build_category_buttons_for(alert_category) if alert_category else []
 
         if is_type3 and _dynamic_buttons:
-            # TYPE-3 動態操作按鈕：第一行為類別專屬操作
+            # TYPE-3 動態按鈕：批准/拒絕永遠置頂第一行
+            # 2026-04-17 ogt + Claude Sonnet 4.6 (BUG-C): 強制置頂批准/拒絕
+            # 舊：批准/拒絕列在最後且受 requires_human_approval 控制 → K8s 按鈕蓋台 → 死卡
+            # 新：[批准][拒絕] 永遠第一行，K8s 類別按鈕置後，SRE 第一眼就看到審核扳機
+            rows: list[list[dict]] = [[
+                {"text": "✅ 批准", "callback_data": approve_nonce},
+                {"text": "❌ 拒絕", "callback_data": reject_nonce},
+            ]]
+            # K8s/DB/Host 等類別操作按鈕（每行最多 3 個）置於第二列以後
             category_btns = [
                 {"text": text, "callback_data": cb_data}
                 for text, cb_data in _dynamic_buttons
             ]
-            # 每行最多 3 個，超過換行
-            rows = [category_btns[i:i+3] for i in range(0, len(category_btns), 3)]
-            # 2026-04-17 ogt + Claude Sonnet 4.6: requires_human_approval → 必須附加批准/拒絕行
-            # 根因：有動態按鈕時舊邏輯只有 [詳情][忽略]，SRE 找不到審核扳機 → 死卡
-            if requires_human_approval:
-                rows.append([
-                    {"text": "✅ 批准", "callback_data": approve_nonce},
-                    {"text": "❌ 拒絕", "callback_data": reject_nonce},
-                ])
-            # 通用操作：[查看詳情] [忽略]
+            rows += [category_btns[i:i+3] for i in range(0, len(category_btns), 3)]
+            # 通用操作：[詳情] [忽略]
             rows.append([
                 {"text": "📋 詳情", "callback_data": f"detail:{incident_id}"},
                 {"text": "🔕 忽略", "callback_data": silence_nonce},
@@ -1571,8 +1568,6 @@ class TelegramGateway:
         notification_type: str = "",
         # 2026-04-16 ogt + Claude Sonnet 4.6: 修復鏈路顯示 (ADR-076)
         playbook_name: str = "",
-        # 2026-04-17 ogt + Claude Sonnet 4.6: 強制在動態按鈕卡上加批准/拒絕行
-        requires_human_approval: bool = False,
     ) -> dict:
         """
         推送待簽核卡片到 Telegram (v7.0 含 SignOz 整合)
@@ -1664,7 +1659,6 @@ class TelegramGateway:
             incident_id=incident_id,
             alert_category=alert_category,
             notification_type=notification_type,
-            requires_human_approval=requires_human_approval,
         )
 
         # 發送訊息