fix: resolve multiple miniprogram bugs and extend admin console

- fix manual bind stuck at BLE scan, redirect to bind-success
- add 15s timeout and stopScan to ble-connect
- add stopScan method to ble.js
- add back-to-home button on bind-success page
- fix field name in subscribe-plans (plan -> plan_type)
- fix history.js to handle created_at field
- fix index.js to handle device name field
- add subscription route alias in request.js
- extend admin cloud function from 1 to 9 actions
- add mock mode to admin-console request.js
- remove unused discover page and legacy record function

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

miniprogram/utils/request.js

@@ -80,6 +80,7 @@ var FUNC_MAP = {
   '/api/v1/device/unbind': { fn: 'device', action: 'unbind' },
   '/api/v1/device/list': { fn: 'device', action: 'list' },
   '/api/v1/device/detail': { fn: 'device', action: 'detail' },
+  '/api/v1/subscription': { fn: 'subscription', action: 'status' },
   '/api/v1/subscription/status': { fn: 'subscription', action: 'status' },
   '/api/v1/subscription/purchase': { fn: 'subscription', action: 'purchase' },
   '/api/v1/subscription/verify': { fn: 'subscription', action: 'verify' },