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/routes/taskRoutes.js

@@ -0,0 +1,27 @@
+// routes/taskRoutes.js
+const express = require('express');
+const router = express.Router();
+const taskController = require('../controllers/taskController');
+
+// CREATE 작업
+router.post('/', taskController.createTask);
+
+// READ ALL 작업
+router.get('/', taskController.getAllTasks);
+
+// READ ACTIVE 작업
+router.get('/active/list', taskController.getActiveTasks);
+
+// READ BY WORK TYPE (공정별)
+router.get('/by-work-type/:work_type_id', taskController.getTasksByWorkType);
+
+// READ ONE 작업
+router.get('/:id', taskController.getTaskById);
+
+// UPDATE 작업
+router.put('/:id', taskController.updateTask);
+
+// DELETE 작업
+router.delete('/:id', taskController.deleteTask);
+
+module.exports = router;