docs: add ETC-only vehicle recharge design/plan and refresh graphify

Persist the approved cutover spec and implementation plan; sync graphs after the ETC-only changes.

Co-authored-by: Cursor <cursoragent@cursor.com>

graphify-out/manifest.json

@@ -2708,8 +2708,8 @@
     "hash": "f6f61babff53057b40447bc0f0d919f8"
   },
   "/Users/zlwu/work/00code/shanxia2.0/web-admin/src/views/pl/vehicle-recharge-apply/columnFilterDefs.ts": {
-    "mtime": 1789173977.919259,
-    "hash": "6ef85cb3181984142e9847c77983fe68"
+    "mtime": 1789174078.6825767,
+    "hash": "3dcb948b597f8161f1fdae736f9e3056"
   },
   "/Users/zlwu/work/00code/shanxia2.0/web-admin/src/views/pl/freight/index.vue": {
     "mtime": 1788261905.0,