feat(tkfb): 연차 데이터 정본 전환 — vacation_balance_details → sp_vacation_balances

대시보드 + 연간 연차 현황 페이지의 읽기를 tksupport 정본 테이블로 전환.
- dashboardModel: getVacationBalance worker_id → user_id, sp_vacation_balances
- dashboardController: worker_id 전달 제거, user_id 직접 사용
- vacationBalanceModel: 읽기 함수 3개 sp_vacation_balances로 전환
  (쓰기 함수 deductByPriority 등은 vacation_balance_details 유지)
- remaining_days: STORED GENERATED 대신 (total_days - used_days) AS 계산

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

system1-factory/api/models/vacationBalanceModel.js

@@ -13,14 +13,15 @@ const vacationBalanceModel = {
     const db = await getDb();
     const [rows] = await db.query(`
       SELECT
-        vbd.*,
-        vt.type_name,
-        vt.type_code,
-        vt.priority,
-        vt.is_special
-      FROM vacation_balance_details vbd
-      INNER JOIN vacation_types vt ON vbd.vacation_type_id = vt.id
-      WHERE vbd.user_id = ? AND vbd.year = ?
+        svb.id, svb.user_id, svb.vacation_type_id, svb.year,
+        svb.total_days, svb.used_days,
+        (svb.total_days - svb.used_days) AS remaining_days,
+        svb.balance_type, svb.expires_at, svb.notes,
+        svb.created_by, svb.created_at, svb.updated_at,
+        vt.type_name, vt.type_code, vt.priority, vt.is_special
+      FROM sp_vacation_balances svb
+      INNER JOIN vacation_types vt ON svb.vacation_type_id = vt.id
+      WHERE svb.user_id = ? AND svb.year = ?
       ORDER BY vt.priority ASC, vt.type_name ASC
     `, [userId, year]);
     return rows;
@@ -33,14 +34,16 @@ const vacationBalanceModel = {
     const db = await getDb();
     const [rows] = await db.query(`
       SELECT
-        vbd.*,
-        vt.type_name,
-        vt.type_code
-      FROM vacation_balance_details vbd
-      INNER JOIN vacation_types vt ON vbd.vacation_type_id = vt.id
-      WHERE vbd.user_id = ?
-        AND vbd.vacation_type_id = ?
-        AND vbd.year = ?
+        svb.id, svb.user_id, svb.vacation_type_id, svb.year,
+        svb.total_days, svb.used_days,
+        (svb.total_days - svb.used_days) AS remaining_days,
+        svb.balance_type, svb.expires_at,
+        vt.type_name, vt.type_code
+      FROM sp_vacation_balances svb
+      INNER JOIN vacation_types vt ON svb.vacation_type_id = vt.id
+      WHERE svb.user_id = ?
+        AND svb.vacation_type_id = ?
+        AND svb.year = ?
     `, [userId, vacationTypeId, year]);
     return rows;
   },
@@ -52,16 +55,17 @@ const vacationBalanceModel = {
     const db = await getDb();
     const [rows] = await db.query(`
       SELECT
-        vbd.*,
-        w.worker_name,
-        w.employment_status,
-        vt.type_name,
-        vt.type_code,
-        vt.priority
-      FROM vacation_balance_details vbd
-      INNER JOIN workers w ON vbd.user_id = w.user_id
-      INNER JOIN vacation_types vt ON vbd.vacation_type_id = vt.id
-      WHERE vbd.year = ?
+        svb.id, svb.user_id, svb.vacation_type_id, svb.year,
+        svb.total_days, svb.used_days,
+        (svb.total_days - svb.used_days) AS remaining_days,
+        svb.balance_type, svb.expires_at, svb.notes,
+        svb.created_by, svb.created_at, svb.updated_at,
+        w.worker_name, w.employment_status,
+        vt.type_name, vt.type_code, vt.priority
+      FROM sp_vacation_balances svb
+      INNER JOIN workers w ON svb.user_id = w.user_id
+      INNER JOIN vacation_types vt ON svb.vacation_type_id = vt.id
+      WHERE svb.year = ?
         AND w.employment_status = 'employed'
       ORDER BY w.worker_name ASC, vt.priority ASC
     `, [year]);