loading shifts (#3997)
* feat: implement real-time traffic monitoring and UI updates using a high-performance WebSocket hub and background job system
* feat: add bulk client management support and improve inbound data handling
* Fix bug
* **Fixes & Changes:**
1. **Fixed XPadding Placement Dropdown**:
- Added the missing `cookie` and `query` options to `xPaddingPlacement` (`stream_xhttp.html`).
- *Why:* Previously, users wanting `cookie` obfuscation were forced to use the `header` placement string. This caused Xray-core to blindly intercept the entire monolithic HTTP Cookie header, failing internal padding-length validations and causing the inbound to silently drop the connection.
2. **Fixed Uplink Data Placement Validation**:
- Replaced the unsupported `query` option with `cookie` in `uplinkDataPlacement`.
- *Why:* Xray-core's `transport_internet.go` explicitly forbids `query` as an uplink placement option. Selecting it from the UI previously sent a payload that would cause Xray-core to instantly throw an `unsupported uplink data placement: query` panic. Adding `cookie` perfectly aligns the UI with Xray-core restrictions.
### Related Issues
- Resolves #3992
* This commit fixes structural payload issues preventing XHTTP from functioning correctly and eliminates WebSocket log spam.
- **[Fix X-Padding UI]** Added missing `cookie` and `query` options to X-Padding Placement. Fixes the issue where using Cookie fallback triggers whole HTTP Cookie header interception and silent drop in Xray-core. (Resolves [#3992](https://github.com/MHSanaei/3x-ui/issues/3992))
- **[Fix Uplink Data Options]** Replaced the invalid `query` option with `cookie` in Uplink Data Placement dropdown to prevent Xray-core backend panic `unsupported uplink data placement: query`.
- **[Fix WebSockets Spam]** Boosted `maxMessageSize` boundary to 100MB and gracefully handled fallback fetch signals via `broadcastInvalidate` to avoid buffer dropping spam. (Resolves [#3984](https://github.com/MHSanaei/3x-ui/issues/3984))
* Fix
* gofmt
* fix(websocket): resolve channel race condition and graceful shutdown deadlock
* Fix: inbounds switch
* Change max quantity from 10000 to 500
* fix
