HEL-168: 公司端工作台待办按权威单边集合同步

确认成功后重拉 /api/company/workspace，去确认数字与本月待办共用同一口径；
新增公司端确认接口与 3→2→1→0 集成测试，失败/重复确认不误减。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

src/bank_importer/matching.py

@@ -1563,6 +1563,87 @@ def exposed_status(decision: sqlite3.Row | dict) -> str:
     return "unresolved"
 
 
+def company_pending_unilaterals(
+    connection: sqlite3.Connection, company_id: int
+) -> list[sqlite3.Row]:
+    """Authoritative pending unilateral queue for a company workspace.
+
+    Same set as company match-exceptions: active events whose current decision
+    is ``unresolved`` / ``needs_review`` and the company participates.
+    Parentheses on the company filter avoid OR/AND precedence bugs.
+    """
+    return connection.execute(
+        """
+        SELECT c.event_id, d.id AS decision_id, d.revision, d.classification,
+               d.pairing, d.amount, d.currency, d.effective_at, d.mode,
+               d.locked, d.rule_version, d.created_at,
+               payer.company_id AS payer_company_id,
+               payee.company_id AS payee_company_id,
+               payer.bank_account_id AS payer_account_id,
+               payee.bank_account_id AS payee_account_id,
+               cpayer.name AS payer_company_name,
+               cpayee.name AS payee_company_name,
+               (SELECT COUNT(*) FROM transfer_decision_observations o
+                WHERE o.decision_id = d.id) AS evidence_count
+        FROM current_transfer_decisions c
+        JOIN transfer_match_decisions d ON d.id = c.decision_id
+        JOIN canonical_transfer_events e ON e.id = c.event_id
+        LEFT JOIN transfer_decision_participants payer
+             ON payer.decision_id = d.id AND payer.role = 'payer'
+        LEFT JOIN transfer_decision_participants payee
+             ON payee.decision_id = d.id AND payee.role = 'payee'
+        LEFT JOIN companies cpayer ON cpayer.id = payer.company_id
+        LEFT JOIN companies cpayee ON cpayee.id = payee.company_id
+        WHERE e.lifecycle = 'active'
+          AND d.classification IN ('unresolved', 'needs_review')
+          AND (payer.company_id = ? OR payee.company_id = ?)
+        ORDER BY d.id DESC
+        """,
+        (company_id, company_id),
+    ).fetchall()
+
+
+def company_workspace_payload(
+    connection: sqlite3.Connection, company_id: int
+) -> dict[str, object]:
+    """Workspace counts + list share one authoritative unilateral queue."""
+    rows = company_pending_unilaterals(connection, company_id)
+    events = [
+        {
+            "event_id": row["event_id"],
+            "decision_id": row["decision_id"],
+            "revision": row["revision"],
+            "classification": row["classification"],
+            "pairing": row["pairing"],
+            "status": exposed_status(row),
+            "amount": row["amount"],
+            "currency": row["currency"],
+            "effective_at": row["effective_at"],
+            "mode": row["mode"],
+            "locked": bool(row["locked"]),
+            "own_company_id": company_id,
+            "counterparty_company_id": (
+                row["payee_company_id"]
+                if row["payer_company_id"] == company_id
+                else row["payer_company_id"]
+            ),
+            "counterparty_company_name": (
+                row["payee_company_name"]
+                if row["payer_company_id"] == company_id
+                else row["payer_company_name"]
+            ),
+            "evidence_count": row["evidence_count"],
+        }
+        for row in rows
+    ]
+    count = len(events)
+    return {
+        "pending_unilateral": count,
+        "pending_total": count,
+        "unilateral_events": events,
+    }
+
+
 # ---------------------------------------------------------------------------
 # API payload helpers
 # ---------------------------------------------------------------------------