backup: 完成 HR_position_ 表格前綴重命名與欄位對照表整理

變更內容：
- 所有資料表加上 HR_position_ 前綴
- 整理完整欄位顯示名稱與 ID 對照表
- 模組化 JS 檔案 (admin.js, ai.js, csv.js 等)
- 專案結構優化 (docs/, scripts/, tests/ 等)

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

js/main.js

@@ -89,26 +89,26 @@ function setupFormListeners() {
         field.addEventListener('input', updatePreview);
     });
 
-    // 崗位類別變更
-    const positionCategory = document.getElementById('positionCategory');
+    // 崗位類別變更 (pos_category)
+    const positionCategory = document.getElementById('pos_category');
     if (positionCategory) {
         positionCategory.addEventListener('change', updateCategoryName);
     }
 
-    // 崗位性質變更
-    const positionNature = document.getElementById('positionNature');
+    // 崗位性質變更 (pos_type)
+    const positionNature = document.getElementById('pos_type');
     if (positionNature) {
         positionNature.addEventListener('change', updateNatureName);
     }
 
-    // 職務類別變更
-    const jobCategoryCode = document.getElementById('jobCategoryCode');
+    // 職務類別變更 (job_category)
+    const jobCategoryCode = document.getElementById('job_category');
     if (jobCategoryCode) {
         jobCategoryCode.addEventListener('change', updateJobCategoryName);
     }
 
-    // Toggle 開關變更
-    const hasAttendanceBonus = document.getElementById('hasAttendanceBonus');
+    // Toggle 開關變更 (job_hasAttBonus)
+    const hasAttendanceBonus = document.getElementById('job_hasAttBonus');
     if (hasAttendanceBonus) {
         hasAttendanceBonus.addEventListener('change', function() {
             const label = document.getElementById('attendanceLabel');
@@ -119,7 +119,8 @@ function setupFormListeners() {
         });
     }
 
-    const hasHousingAllowance = document.getElementById('hasHousingAllowance');
+    // Toggle 開關變更 (job_hasHouseAllow)
+    const hasHousingAllowance = document.getElementById('job_hasHouseAllow');
     if (hasHousingAllowance) {
         hasHousingAllowance.addEventListener('change', function() {
             const label = document.getElementById('housingLabel');