feat: P01/P02阶梯榫卯面承载+P03侧开式托架/P04加长避让重构，精简零件显示名并同步重建模型数据与查看器，清理历史文档

docs/travel.json

@@ -1,43 +1,43 @@
 [
  {
   "axis": "J1",
-  "lo": 0.0,
-  "hi": 179.0,
-  "continuous": false,
+  "lo": -180.0,
+  "hi": 180.0,
+  "continuous": true,
   "zero": 0.0,
-  "note": "正向 +179° / 反向 0°，总行程 179°（全对全动态扫描验证，含相邻件与电机）"
+  "note": "整周无干涉，可 360° 连续旋转（全对全动态扫描验证）"
  },
  {
   "axis": "J2",
-  "lo": -114.0,
-  "hi": 113.0,
+  "lo": -106.0,
+  "hi": 9.0,
   "continuous": false,
   "zero": 0.0,
-  "note": "正向 +113° / 反向 -114°，总行程 227°（全对全动态扫描验证，含相邻件与电机）"
+  "note": "正向 +9° / 反向 -106°，总行程 115°（全对全动态扫描验证，含相邻件与电机）"
  },
  {
   "axis": "J3",
-  "lo": -108.0,
-  "hi": 152.0,
-  "continuous": false,
+  "lo": -180.0,
+  "hi": 180.0,
+  "continuous": true,
   "zero": 0.0,
-  "note": "正向 +152° / 反向 -108°，总行程 260°（全对全动态扫描验证，含相邻件与电机）"
+  "note": "整周无干涉，可 360° 连续旋转（全对全动态扫描验证）"
  },
  {
   "axis": "J4",
   "lo": -121.0,
-  "hi": 121.0,
+  "hi": 16.0,
   "continuous": false,
   "zero": 0.0,
-  "note": "正向 +121° / 反向 -121°，总行程 242°（P07 L型圆弧立柱优化实测，物理极限 ±122.6°，零干涉）"
+  "note": "正向 +16° / 反向 -121°，总行程 137°（全对全动态扫描验证，含相邻件与电机）"
  },
  {
   "axis": "J5",
-  "lo": -89.0,
-  "hi": 89.0,
+  "lo": -95.0,
+  "hi": 34.0,
   "continuous": false,
   "zero": 0.0,
-  "note": "正向 +89° / 反向 -89°，总行程 178°（消除悬空块+R28相切大圆弧优化实测，物理极限 ±90.0°，零干涉）"
+  "note": "正向 +34° / 反向 -95°，总行程 129°（全对全动态扫描验证，含相邻件与电机）"
  },
  {
   "axis": "J6",