feat: 작업 관리 시스템 및 TBM 공정/작업 통합

## Backend Changes
- Create tasks table with work_type_id FK to work_types
- Add taskModel, taskController, taskRoutes for task CRUD
- Update tbmModel to support work_type_id and task_id
- Add migrations for tasks table and TBM integration

## Frontend Changes
- Create task management admin page (tasks.html, task-management.js)
- Update TBM modal to include work type (공정) and task (작업) selection
- Add cascading dropdown: work type → task selection
- Display work type and task info in TBM session cards
- Update sidebar navigation in all admin pages

## Database Schema
- tasks: task_id, work_type_id, task_name, description, is_active
- tbm_sessions: add work_type_id, task_id columns with FKs
- Foreign keys maintain referential integrity with work_types and tasks

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

api.hyungi.net/models/taskModel.js

@@ -0,0 +1,170 @@
+/**
+ * 작업 모델
+ *
+ * @author TK-FB-Project
+ * @since 2026-01-26
+ */
+
+const { getDb } = require('../db/connection');
+
+// ==================== 작업 CRUD ====================
+
+/**
+ * 작업 생성
+ */
+const createTask = async (taskData, callback) => {
+  try {
+    const db = await getDb();
+    const { work_type_id, task_name, description } = taskData;
+
+    const [result] = await db.query(
+      `INSERT INTO tasks (work_type_id, task_name, description, is_active)
+       VALUES (?, ?, ?, 1)`,
+      [work_type_id || null, task_name, description || null]
+    );
+
+    callback(null, result.insertId);
+  } catch (err) {
+    callback(err);
+  }
+};
+
+/**
+ * 전체 작업 목록 조회 (공정 정보 포함)
+ */
+const getAllTasks = async (callback) => {
+  try {
+    const db = await getDb();
+    const [rows] = await db.query(
+      `SELECT t.task_id, t.work_type_id, t.task_name, t.description, t.is_active,
+              t.created_at, t.updated_at,
+              wt.name as work_type_name, wt.category
+       FROM tasks t
+       LEFT JOIN work_types wt ON t.work_type_id = wt.id
+       ORDER BY wt.category ASC, t.task_id DESC`
+    );
+    callback(null, rows);
+  } catch (err) {
+    callback(err);
+  }
+};
+
+/**
+ * 활성 작업만 조회
+ */
+const getActiveTasks = async (callback) => {
+  try {
+    const db = await getDb();
+    const [rows] = await db.query(
+      `SELECT t.task_id, t.work_type_id, t.task_name, t.description,
+              wt.name as work_type_name, wt.category
+       FROM tasks t
+       LEFT JOIN work_types wt ON t.work_type_id = wt.id
+       WHERE t.is_active = 1
+       ORDER BY wt.category ASC, t.task_name ASC`
+    );
+    callback(null, rows);
+  } catch (err) {
+    callback(err);
+  }
+};
+
+/**
+ * 공정별 작업 목록 조회
+ */
+const getTasksByWorkType = async (workTypeId, callback) => {
+  try {
+    const db = await getDb();
+    const [rows] = await db.query(
+      `SELECT t.task_id, t.work_type_id, t.task_name, t.description, t.is_active,
+              t.created_at, t.updated_at,
+              wt.name as work_type_name, wt.category
+       FROM tasks t
+       LEFT JOIN work_types wt ON t.work_type_id = wt.id
+       WHERE t.work_type_id = ?
+       ORDER BY t.task_id DESC`,
+      [workTypeId]
+    );
+    callback(null, rows);
+  } catch (err) {
+    callback(err);
+  }
+};
+
+/**
+ * 단일 작업 조회
+ */
+const getTaskById = async (taskId, callback) => {
+  try {
+    const db = await getDb();
+    const [rows] = await db.query(
+      `SELECT t.task_id, t.work_type_id, t.task_name, t.description, t.is_active,
+              t.created_at, t.updated_at,
+              wt.name as work_type_name, wt.category
+       FROM tasks t
+       LEFT JOIN work_types wt ON t.work_type_id = wt.id
+       WHERE t.task_id = ?`,
+      [taskId]
+    );
+    callback(null, rows[0] || null);
+  } catch (err) {
+    callback(err);
+  }
+};
+
+/**
+ * 작업 수정
+ */
+const updateTask = async (taskId, taskData, callback) => {
+  try {
+    const db = await getDb();
+    const { work_type_id, task_name, description, is_active } = taskData;
+
+    const [result] = await db.query(
+      `UPDATE tasks
+       SET work_type_id = ?,
+           task_name = ?,
+           description = ?,
+           is_active = ?,
+           updated_at = NOW()
+       WHERE task_id = ?`,
+      [
+        work_type_id || null,
+        task_name,
+        description || null,
+        is_active !== undefined ? is_active : 1,
+        taskId
+      ]
+    );
+
+    callback(null, result);
+  } catch (err) {
+    callback(err);
+  }
+};
+
+/**
+ * 작업 삭제
+ */
+const deleteTask = async (taskId, callback) => {
+  try {
+    const db = await getDb();
+    const [result] = await db.query(
+      `DELETE FROM tasks WHERE task_id = ?`,
+      [taskId]
+    );
+    callback(null, result);
+  } catch (err) {
+    callback(err);
+  }
+};
+
+module.exports = {
+  createTask,
+  getAllTasks,
+  getActiveTasks,
+  getTasksByWorkType,
+  getTaskById,
+  updateTask,
+  deleteTask
+};